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JP4592710B2 - Accident location system - Google Patents

Accident location system Download PDF

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JP4592710B2
JP4592710B2 JP2007005972A JP2007005972A JP4592710B2 JP 4592710 B2 JP4592710 B2 JP 4592710B2 JP 2007005972 A JP2007005972 A JP 2007005972A JP 2007005972 A JP2007005972 A JP 2007005972A JP 4592710 B2 JP4592710 B2 JP 4592710B2
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accident
point
voltage
distribution line
information
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JP2008170381A (en
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通博 田所
耕二 前田
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Mitsubishi Electric Corp
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Description

この発明は、電力用の配電線における事故点の標定を行う事故点標定システムに関するものである。   The present invention relates to an accident point locating system for locating an accident point in a power distribution line.

従来の事故点標定システムでは、送電線の各端子の電圧情報および電流情報を取得して、これらの情報を電話回線など専用回線を利用して事故点標定演算手段に情報を伝送し、得られた電圧情報および電流情報から事故点までのインピーダンスや事故点までの無効電力を求めることで事故点の標定を行っている（例えば特開２００１−１３１９６号公報を参照）。   The conventional accident location system obtains voltage information and current information of each terminal of the transmission line, and transmits this information to the accident location calculation means using a dedicated line such as a telephone line. The fault point is determined by obtaining the impedance to the fault point and the reactive power to the fault point from the voltage information and the current information (see, for example, JP-A-2001-13196).

この従来の事故点標定システムを図２２により具体的に説明する。   This conventional accident location system will be described in detail with reference to FIG.

図２２において、対象となる送電線の構成は以下の通りである。端子１３０と端子１３２の間に１Ｌ系統の送電線１０１、２Ｌ系統の送電線１０２が設けられ、かつ、各系統の途中から端子１３４に分岐線１０３、１０４が設けられている。端子１３０には電源として発電機１０５が設けられ、また分岐端子１３４にも発電機１０６が設けられている。
各端には開閉器（ＣＢ）１２１〜１２６が設けられ、系統事故発生時には別に設けられる保護リレーからの指令で開放され、再閉路時間が経過すると再閉される。 In FIG. 22, the configuration of the target transmission line is as follows. Between the terminal 130 and the terminal 132, the 1L power transmission line 101 and the 2L power transmission line 102 are provided, and the branch lines 103 and 104 are provided at the terminal 134 from the middle of each system. The terminal 130 is provided with a generator 105 as a power source, and the branch terminal 134 is also provided with a generator 106.
At each end, switches (CB) 121 to 126 are provided, which are opened by a command from a protection relay provided separately when a system fault occurs, and are closed again when the reclosing time elapses.

事故点標定システムとして、端子１３０に親局１１２、分岐端１３４に子局１１０を設けている。親局１１２には１Ｌ，２Ｌ系統のＣＴ１４０，１４１およびＰＴ１４４，１４５のそれぞれから、３相電流情報および３相電圧情報が入力される。また、子局１１０にも１Ｌ，２Ｌ系統のＣＴ１４２，１４３およびＰＴ１４６，１４７のそれぞれから、３相電流情報および３相電圧情報が入力される。そして子局１１０から親局１１２へ、分岐端子１３４の電流情報等が専用回線１１４を経て伝送される。専用回線１１４は例として通常の４Ｗ方式（送信２本、受信２本のシリアル伝送）の電話回線が挙げられている。   As an accident point location system, a master station 112 is provided at a terminal 130 and a slave station 110 is provided at a branch end 134. The master station 112 receives three-phase current information and three-phase voltage information from each of the CTs 140 and 141 and PTs 144 and 145 of the 1L and 2L systems. The slave station 110 also receives three-phase current information and three-phase voltage information from the 1L and 2L CTs 142 and 143 and PTs 146 and 147, respectively. Then, current information and the like of the branch terminal 134 is transmitted from the slave station 110 to the master station 112 via the dedicated line 114. As an example of the dedicated line 114, a telephone line of a normal 4W system (serial transmission with two transmissions and two receptions) is cited.

事故点標定は、親局１１２に設けられた事故点標定演算回路で行われる。事故点標定演算回路では、自端（端子１３０）の電流状態とあらかじめ設定されている分岐端電流の整定値から事故点標定を行う。さらに子局１１０から受信する分岐端１３４の電流状態の実測値を用いて補正された事故点標定演算を行う。このように分岐端での廻り込み電流も加味した標定演算を行うことで事故点標定の精度を上げている。なお、ここでは事故点標定演算は事故点までの無効電力と単位長当りの無効電力の比から事故点を求める例であるが、事故点までのインピーダンスを求めるインピーダンス方式により事故点標定演算を行う場合も同様な構成でなされることが示されている。   The accident point location is performed by an accident point location calculation circuit provided in the master station 112. The fault point location calculation circuit performs fault point location from the current state of the terminal (terminal 130) and the preset value of the branch end current. Further, the accident point location calculation corrected using the actual measured value of the current state of the branch end 134 received from the slave station 110 is performed. In this way, the accuracy of the accident point location is improved by performing the location calculation in consideration of the sneak current at the branch end. The accident location calculation is an example of determining the accident point from the ratio of the reactive power up to the accident point and the reactive power per unit length. However, the accident point location calculation is performed using the impedance method for determining the impedance up to the accident point. It is shown that the case is also made with the same configuration.

特開２００１−１３１９６号公報（図１及びその説明）Japanese Patent Laid-Open No. 2001-13196 (FIG. 1 and description thereof)

前述の従来の送電線用事故点標定システムを配電系統に適用する場合には、送電系統と異なり配電系統には系統の随所で負荷や発電機等が接続されるため、系統インピーダンスが見かけ上一様ではなくなり、系統途中に接続される負荷容量や発電機容量が大きくなるほど事故点標定演算の誤差が増大する。   When the above-mentioned conventional fault location system for transmission lines is applied to a distribution system, unlike the transmission system, loads and generators are connected to the distribution system at various points in the system, so the system impedance is apparently uniform. As the load capacity or generator capacity connected in the middle of the system increases, the error of the fault location calculation increases.

この発明は、前述のような実情に鑑みてなされたもので、電力用の配電線における事故点を配電線電圧を利用して高精度に標定できるようにすることを目的とするものである。 The present invention has been made in view of the above circumstances, and an object of the present invention is to make it possible to highly accurately locate an accident point in a power distribution line by using a distribution line voltage .

この発明に係る事故点標定システムは、
配電線の各地点に対応して設けられ各地点の電圧を計測し配電線電圧の情報を出力する電圧計測手段、
前記配電線の各地点に対応して設けられ、事故発生時に事故発生情報を送信する事故検出手段からの事故発生情報に基づき事故時の前記電圧計測手段の出力である配電線電圧の情報を取得する複数の子局、
これら子局から前記配電線の各地点の前記配電線電圧情報を収集する親局、および
前記親局が前記各子局から収集した前記配電線の各地点の前記配電線電圧情報のうち事故点にむかって減少する関係にある複数の商用周波電圧から事故点を標定する事故点標定部を備えた事故点標定システムである。 The accident location system according to this invention is
Voltage measuring means provided corresponding to each point of the distribution line and measuring the voltage at each point and outputting information on the distribution line voltage,
Acquires information on the distribution line voltage that is the output of the voltage measurement means at the time of the accident based on the accident occurrence information from the accident detection means that is provided corresponding to each point of the distribution line and transmits the accident occurrence information at the time of occurrence of the accident Multiple slave stations,
A master station that collects the distribution line voltage information at each point of the distribution line from these slave stations, and an accident point in the distribution line voltage information at each point of the distribution line that the master station collects from each of the slave stations This is an accident point locating system including an accident point locating unit for locating an accident point from a plurality of commercial frequency voltages having a decreasing relationship.

この発明は、配電線の各地点に対応して設けられ各地点の電圧を計測し配電線電圧の情報を出力する電圧計測手段、前記配電線の各地点に対応して設けられ、事故発生時に事故発生情報を送信する事故検出手段からの事故発生情報に基づき事故時の前記電圧計測手段の出力である配電線電圧の情報を取得する複数の子局、これら子局から前記配電線の各地点の前記配電線電圧情報を収集する親局、および前記親局が前記各子局から収集した前記配電線の各地点の前記配電線電圧情報のうち事故点にむかって減少する関係にある複数の商用周波電圧から事故点を標定する事故点標定部を備えた事故点標定システムとしたので、商用周波電圧を利用した事故点標定システムを実現できると共に電力用の配電線における事故点を高精度に標定できる効果がある。 This invention is provided corresponding to each point of the distribution line, is provided corresponding to each point of the distribution line, voltage measuring means provided corresponding to each point of the distribution line and measuring the voltage of each point and outputting information of the distribution line voltage, at the time of occurrence of an accident A plurality of slave stations that acquire information on the distribution line voltage that is the output of the voltage measurement means at the time of the accident based on the accident occurrence information from the accident detection means that transmits the accident occurrence information, each point of the distribution line from these slave stations A plurality of master stations that collect the distribution line voltage information, and a plurality of the distribution line voltage information that the master station collects from each of the slave stations at a point of the distribution line that decreases toward an accident point. The accident point locating system is equipped with an accident point locating section that locates the accident point from the commercial frequency voltage. Therefore, an accident point locating system using commercial frequency voltage can be realized and the accident point on the power distribution line can be accurately Can be oriented There is a result.

実施の形態１．
以下この発明の実施の形態１を図１〜図３により説明する。図１は配電線における事故点標定システムの事例を示す図、図２は図１における親局の内部構成の事例を示す図、図３は図１における子局の内部構成の事例を示す図である。なお、各図中、同一符合は同一部分を示す。 Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to FIGS. 1 is a diagram showing an example of an accident point location system in a distribution line, FIG. 2 is a diagram showing an example of the internal configuration of the master station in FIG. 1, and FIG. 3 is a diagram showing an example of the internal configuration of the slave station in FIG. is there. In addition, in each figure, the same code | symbol shows the same part.

図１において、電源１は送電系統２を介して配電用変電所内の母線（以下「端子」と呼称する）３に接続されている。４は配電用変電所内の端子３から展開されている複数の高圧配電線の内の１つを示しており、分岐により４ａ，４ｂ，４ｃの３つの幹線から構成されている。ここで、配電用変電所とは、配電線が接続される端子を有する電気所のことである。   In FIG. 1, a power source 1 is connected to a bus (hereinafter referred to as “terminal”) 3 in a distribution substation via a power transmission system 2. Reference numeral 4 denotes one of a plurality of high-voltage distribution lines developed from the terminal 3 in the distribution substation, and is composed of three trunk lines 4a, 4b, and 4c by branching. Here, the distribution substation is an electric station having a terminal to which a distribution line is connected.

配電用変電所内には親局５が設けられ、配電線上には適度の間隔で複数個の子局６ａ〜６ｅが設けられている。また、事故点標定演算手段を備えた事故点標定部７が、親局５と情報伝送が可能なように接続されている。子局６ａ，６ｂ，・・・６ｅ，・・・および親局５は、配電線４および端子３の各地点電圧を計測するためのＰＴ（計器用変圧器）等の電圧計測手段（以下「ＰＴ」と記す）８ａ，８ｂ，・・・８ｆ，・・・から、対応するＰＴ設置点の配電線電圧の情報を入力する。子局６ａ，６ｂ，・・・６ｅ，・・・および親局５には、電力線搬送通信手段による通信信号を配電線４および端子３に対し注入したり抽出したりする信号結合器９ａ，９ｂ，・・・９ｆ，・・・が接続されている。   A master station 5 is provided in the distribution substation, and a plurality of slave stations 6a to 6e are provided at appropriate intervals on the distribution line. Further, an accident point locating unit 7 having an accident point locating calculation means is connected to the master station 5 so that information transmission is possible. The slave stations 6a, 6b,... 6e,... And the master station 5 are voltage measuring means (hereinafter referred to as “instrument transformers”) for measuring each point voltage of the distribution line 4 and the terminal 3. 8a, 8b,... 8f,..., Information on the distribution line voltage at the corresponding PT installation point is input. The slave stations 6a, 6b,... 6e,... And the master station 5 have signal couplers 9a, 9b for injecting and extracting communication signals from the power line carrier communication means to the distribution lines 4 and the terminals 3. ,... 9f,.

次に、親局５について説明する。図２において、親局５は、事故検出手段１１ｆ、電圧情報取得手段１２ｆ、電力線搬送通信手段１３ｆ、および事故点標定演算部７と情報伝送を行うための伝送手段１４から構成されている。   Next, the master station 5 will be described. In FIG. 2, the master station 5 includes an accident detection unit 11f, a voltage information acquisition unit 12f, a power line carrier communication unit 13f, and a transmission unit 14 for transmitting information with the accident point location calculation unit 7.

次に、子局について説明する。図３において、子局６ａは事故検出手段１１ａ、電圧情報取得手段１２ａ、および電力線搬送通信手段１３ａから構成されている。なお配電線上に複数個設けられている他の子局６ｂ，・・・６ｅ，・・・も、子局６ａと同じ構成である。   Next, the slave station will be described. In FIG. 3, the slave station 6a includes an accident detection means 11a, a voltage information acquisition means 12a, and a power line carrier communication means 13a. The other slave stations 6b, ... 6e, ... provided on the distribution line have the same configuration as the slave station 6a.

次に、動作について説明する。   Next, the operation will be described.

まず親局５の動作について説明する。図２において、事故検出手段１１ｆは例えば従来から用いられている不足電圧検出リレーと同様のもので、ＰＴ８ｆに接続され端子３の電圧を監視するとともに事故発生時には、図２に矢印２１ｆで示すように、事故発生情報を電圧情報収集装置１２ｆに送信する。電圧情報収集装置１２ｆはＰＴ８ｆに接続されており、事故検出手段１１ｆからの事故発生情報に基づき事故時の端子３の電圧情報を取得する。   First, the operation of the master station 5 will be described. In FIG. 2, the accident detection means 11f is similar to, for example, a conventional undervoltage detection relay, which is connected to the PT 8f and monitors the voltage at the terminal 3, and when an accident occurs, as shown by an arrow 21f in FIG. In addition, the accident occurrence information is transmitted to the voltage information collecting device 12f. The voltage information collecting device 12f is connected to the PT 8f, and acquires the voltage information of the terminal 3 at the time of the accident based on the accident occurrence information from the accident detection means 11f.

次に子局６ａの動作について説明する。図３において、事故検出手段１１ａは例えば従来から用いられている不足電圧検出リレーと同様のもので、ＰＴ８ａに接続され子局６ａが設置されている地点の配電線４の電圧を監視するとともに事故発生時には、図３に矢印２１ａで示すように、事故発生情報を電圧情報収集装置１２ａに送信する。電圧情報収集装置１２ａはＰＴ８ａに接続されており、事故検出手段１１ａからの事故発生情報に基づき事故時の配電線４の電圧情報を取得する。 A description will be given of the operation of Tsuginiko station 6 a. In FIG. 3, the accident detection means 11a is the same as a conventional undervoltage detection relay, for example, and monitors the voltage of the distribution line 4 at the point where the slave station 6a is connected to the PT 8a and the accident. At the time of occurrence, as shown by the arrow 21a in FIG. The voltage information collecting device 12a is connected to the PT 8a, and acquires the voltage information of the distribution line 4 at the time of the accident based on the accident occurrence information from the accident detection means 11a.

親局５と子局６ａは、それぞれに設けられた電力線搬送通信手段１３ｆ，１３ａにより、高圧配電線４を介して通信ができる。より詳細には、親局４に設けられた電力線搬送通信手段１３ｆと子局に設けられた電力線搬送通信手段１３ａは、それぞれに接続される信号結合器９ｆと９ａを経て高圧配電線４を介して通信ができる。これにより子局６ａの電圧情報取得手段１２ａで取得された事故時の電圧情報は、この電力線搬送通信手段１３により親局５に伝送される。   The master station 5 and the slave station 6a can communicate with each other via the high-voltage distribution line 4 by the power line carrier communication means 13f and 13a provided respectively. More specifically, the power line carrier communication means 13f provided in the master station 4 and the power line carrier communication means 13a provided in the slave station are connected to the high voltage distribution line 4 via signal couplers 9f and 9a connected to the power station carrier communication means 13f. Can communicate. Thereby, the voltage information at the time of the accident acquired by the voltage information acquisition means 12a of the slave station 6a is transmitted to the master station 5 by the power line carrier communication means 13.

他の子局６ｂ，・・・６ｅ，・・・の各々の電圧情報取得手段１２ｂ，・・・１２ｅ，・・・で取得された事故時の配電線各地の電圧情報も、同様に電力線搬送手段１３により親局５に伝送される。   The voltage information of each part of the distribution line at the time of the accident acquired by the voltage information acquisition means 12b of each of the other slave stations 6b,... 6e,. It is transmitted to the master station 5 by means 13.

親局５は自局で取得した事故時の端子３の電圧情報と、各子局６ａ，６ｂ，・・・６ｅ，・・・から伝送されてきた事故時の配電線４の各地の電圧情報を伝送手段１４を通じて事故点標定演算手段をそなえた事故点標定演算部７へ伝送する。事故点標定演算部７において親局５および子局６ａ，６ｂ，・・・６ｅ，・・・で取得された事故時の電圧情報を元に事故点の標定演算がなされる。事故時の配電線４各地の電圧情報から事故点を標定する原理は後述の実施の形態３以降で詳述する。   The master station 5 obtains the voltage information of the terminal 3 at the time of the accident acquired by the own station, and the voltage information of each part of the distribution line 4 at the time of the accident transmitted from each of the slave stations 6a, 6b,. Is transmitted to the accident point location calculation unit 7 having the accident point location calculation means through the transmission means 14. The accident point location calculation unit 7 calculates the accident point location based on the voltage information at the time of the accident acquired at the master station 5 and the slave stations 6a, 6b,... 6e,. The principle of locating the accident point from the voltage information of each part of the distribution line 4 at the time of the accident will be described in detail in Embodiment 3 and later.

このように、この発明の実施の形態１は、配電用変電所内に設けられた親局５に電圧情報取得手段と電力線搬送通信手段１３ｆを設けるとともに、配電線上に適度な間隔で複数地点に子局６ａ，６ｂ，・・・６ｅ，・・・を設け各子局にも電圧情報取得手段と電力線搬送通信手段１３ａを設けるように構成し、親局５の電力線搬送通信手段１３ｆ、各子局６ａ，６ｂ，・・・６ｅ，・・・の電力線搬送通信手段１３ａおよび配電線４を介して各子局から電力線搬送通信により親局で収集した事故時の配電線各地の電圧情報から、事故点標定演算部７で事故点の標定演算により事故点を標定するようにしたもので、電圧情報のみで事故点標定演算を行うことから、配電系統に随所に接続される負荷の容量や発電機の容量、系統インピーダンス等、の変動要素に殆ど影響されずに精度良く事故点を標定することができる。   As described above, in the first embodiment of the present invention, the voltage information acquisition means and the power line carrier communication means 13f are provided in the master station 5 provided in the distribution substation, and at a plurality of points at appropriate intervals on the distribution line. Stations 6a, 6b,... 6e,... Are provided so that each slave station is also provided with voltage information acquisition means and power line carrier communication means 13a. 6a, 6b,... 6e,... From the voltage information of each part of the distribution line at the time of the accident collected at the master station by the power line carrier communication from each slave station via the power line carrier communication means 13a and the distribution line 4. The point location calculation unit 7 is used to determine the accident point by the location calculation of the accident point. Since the fault point location calculation is performed using only the voltage information, the capacity of the load connected to the distribution system and the generator Capacity, system impedance, etc. Can without being influenced almost the variables to locating accurately the fault point.

また、配電線上に適度な間隔で複数地点に子局６ａ，６ｂ，・・・６ｅ，・・・を設けても、各子局から電力線搬送通信により親局５で事故時の配電線各地の電圧情報を収集することから電圧情報の伝送に専用回線が不要である。
従って、この発明の実施の形態１によれば簡単な構成で精度の高い配電線用事故点標定システムが得られる。 In addition, even if the slave stations 6a, 6b,... 6e,... Are provided at a plurality of points on the distribution line at appropriate intervals, each of the distribution lines at the time of the accident at the master station 5 by the power line carrier communication from each slave station. Since voltage information is collected, a dedicated line is not required for transmission of voltage information.
Therefore, according to the first embodiment of the present invention, a highly accurate distribution line fault location system with a simple configuration can be obtained.

なお、親局５と各子局６ａ，６ｂ，・・・６ｅ，・・・間の通信形態については、各子局６ａ，６ｂ，・・・６ｅ，・・・と親局５とが直接通信する形態や、例えば子局６ｂが情報を一度子局６ａに伝送し子局６ａがその情報を親局５に伝送するような、途中に他の子局で情報を中継して親局５と通信する形態、親局５、各子局６ａ，６ｂ，・・・６ｅ，・・・の任意の中間点に中継局を設けて通信する形態、等、各種の通信形態があり、電圧情報の通信は特別な通信形態に依存することなく前述の効果を呈する。 As for the communication form between the master station 5 and each slave station 6a, 6b,... 6e,..., Each slave station 6a, 6b,. forms of communication, for example the slave stations 6a transmits a slave station 6b information once the child station 6a is such as to transmit the information to the master station 5, the master station 5 relays the information by other slave station in the middle There are various communication modes, such as a mode of communicating with a master station 5 and a mode of communicating by providing a relay station at any intermediate point between the master station 5 and each of the slave stations 6a, 6b,... 6e,. The above-mentioned communication exhibits the above-mentioned effect without depending on a special communication form.

なお、本実施の形態１は、前述のように、概念的には、配電線用事故点標定装置において、配電用変電所内に設けられた親局に、事故検出手段と電圧情報取得手段と電力線搬送通信手段を備えると共に、前記配電用変電所より展開される高圧配電線上の複数地点に設けられた子局に事故検出手段と電圧情報取得手段と前記高圧配電線を介して前記変電所に設けられた該親局と通信ができる電力線搬送通信手段とそれぞれ備え、前記配電線の事故発生時に、前記親局ならびに前記子局の電圧情報取得手段からの電圧情報を取り込むことにより事故点標定を行う標定演算手段を備えた配電線用事故点標定装置である。
また、更に上位概念では、配電線の各地点に対応して設けられ対応地点の配電線の事故時の電圧情報を得る複数の子局、これら子局から前記配電線の各地点の電圧情報を収集する親局、および前記親局が収集した前記配電線の各地点の電圧情報のうち事故点にむかって減少する関係にある複数の電圧を見出してそれら電圧から事故点を標定する事故点標定部を備えた事故点標定システムである。
なお、事故点標定部７は、Ｆａｕｌｔ Ｌｏｃａｔｏｒとも言われ、その略称ＦＬを図中の該当ブロック内に表記してある。
また、事故検出手段１１はＦａｕｌｔ Ｄｅｔｅｃｔｏｒとも言われ、その略称ＤＬを図中の該当ブロック内に表記してある。
また、電圧情報取得手段１２は、Ｄａｔａ Ａｃｑｕｉｓｉｔｉｏｎ Ｕｎｉｔとも言われ、その略称ＤＡＵを図中の該当ブロック内に表記してある。
また、電力線搬送通信手段１３は、Ｐｏｗｅｒ Ｌｉｎｅ Ｃｏｍｍｕｎｉｃａｔｉｏｎ ｍｅａｎｓとも言われ、その略称ＰＬＣを図中の該当ブロック内に表記してある。
また、零点検出手段１６は、Ｚｅｒｏ ｐｏｉｎｔ Ｄｅｔｅｃｔｏｒとも言われ、その略称ＺＤを図中の該当ブロック内に表記してある。
また、フィルタ手段は、Ｆｉｌｔｅｒ ｍｅａｎｓとも言われ、その略称ＦＩＬを図中の該当ブロック内に表記してある。 As described above, the first embodiment conceptually includes an accident detection means, a voltage information acquisition means, and a power line in a master station provided in the distribution substation. Provided in the substation through the accident detection means, voltage information acquisition means, and the high-voltage distribution line in the slave station provided at a plurality of points on the high-voltage distribution line deployed from the distribution substation Power line carrier communication means capable of communicating with the master station, and fault location by taking in voltage information from the voltage information acquisition means of the master station and the slave station when an accident occurs in the distribution line It is an accident point locating device for distribution lines provided with a locating calculation means.
Furthermore, in a higher level concept, a plurality of slave stations that are provided corresponding to each point of the distribution line and obtain voltage information at the time of the distribution line at the corresponding point, voltage information at each point of the distribution line from these slave stations Accident point locating that finds a plurality of voltages that have a decreasing relationship toward the accident point from the voltage information of each point of the distribution line collected by the master station and identifies the accident point from those voltages. It is an accident location system with a part.
The accident point locator 7 is also called a “Fault Locator”, and the abbreviation FL is shown in the corresponding block in the figure.
Moreover, the accident detection means 11 is also called a Fault Detector, and the abbreviation DL is indicated in the corresponding block in the drawing.
Moreover, the voltage information acquisition means 12 is also called Data Acquisition Unit, and the abbreviation DAU is described in the corresponding block in the drawing.
Moreover, the power line carrier communication means 13 is also called Power Line Communication means, and its abbreviation PLC is shown in the corresponding block in the figure.
The zero point detection means 16 is also called a zero point detector, and its abbreviation ZD is shown in the corresponding block in the figure.
The filter means is also called a filter mean, and the abbreviation FIL is shown in the corresponding block in the figure.

実施の形態２．
以下、この発明の実施の形態４を、配電線における事故点標定システムの他の事例を示す図４により説明する。 Embodiment 2. FIG.
Hereinafter, Embodiment 4 of this invention is demonstrated with reference to FIG. 4 which shows the other example of the accident point location system in a distribution line.

図４において電源１、送電系統２、配電用変電所内の端子３、配電用変電所内の端子３から展開されている複数の高圧配電線の内の１つの配電線４、配電用変電所内に設けられた親局５、端子３の電圧を計測するＰＴ８ｆ、親局５に備えられた電力線搬送通信手段による通信信号を配電線４に対し注入したり抽出したりする信号結合器９ｆは、図１で示たものとそれぞれ同じである。２１２は上記の配電用変電所内の端子３から展開されている複数の高圧配電線の内の別のひとつの配電線、２１３は同じく上記の配電用変電所内に設けられた親局、２１４は端子３の電圧を計測するＰＴ、２１５は親局２１３に備えられた電力線搬送通信手段による通信信号を配電線２１２に対し注入したり抽出したりする信号結合器を示す。   In FIG. 4, a power supply 1, a power transmission system 2, a terminal 3 in a distribution substation, a single distribution line 4 of a plurality of high-voltage distribution lines deployed from a terminal 3 in the distribution substation, and a distribution substation A signal coupler 9f for injecting and extracting a communication signal from the power line carrier communication means provided in the master station 5 to the distribution line 4 is shown in FIG. Are the same as those shown in. 212 is another distribution line among the plurality of high-voltage distribution lines developed from the terminal 3 in the distribution substation, 213 is a master station provided in the distribution substation, and 214 is a terminal. Reference numeral PT 215 for measuring the voltage 3 indicates a signal coupler for injecting and extracting a communication signal from the power line carrier communication means provided in the master station 213 to the distribution line 212.

また、他の電源２０１は送電系統２０２を介して配電用変電所内の端子２０３に接続されている。２０４は配電用変電所内の端子２０３から展開されている複数の高圧配電線の内の他の１つの配電線、２０５は配電用変電所内に設けられた親局、２０６は端子２０３から展開される複数の高圧配電線の内の別の１つの配電線、２０７は配電用変電所内に設けられた他の親局、２０８は端子２０３の電圧を計測するためのＰＴ、２０９は親局２０５に備えられた電力線搬送通信手段による通信信号を配電線２０４に対し注入したり抽出したりする信号結合器、２１０は端子２０３の電圧を計測するためのＰＴ、２１１は親局２０７に備えられた電力線搬送通信手段による通信信号を配電線２０６に対し注入したり抽出したりする信号結合器を示す。   The other power source 201 is connected to a terminal 203 in the distribution substation via a power transmission system 202. 204 is another distribution line among the plurality of high-voltage distribution lines deployed from the terminal 203 in the distribution substation, 205 is a master station provided in the distribution substation, and 206 is deployed from the terminal 203. Another distribution line among the plurality of high-voltage distribution lines, 207 is another master station provided in the distribution substation, 208 is a PT for measuring the voltage at the terminal 203, and 209 is provided in the master station 205. A signal coupler for injecting and extracting a communication signal from the power line carrier communication means provided to the distribution line 204, 210 for PT for measuring the voltage of the terminal 203, and 211 for a power line carrier provided in the master station 207. The signal coupler which injects and extracts the communication signal by a communication means with respect to the distribution line 206 is shown.

なお、図４では図１で示した配電線４に設けられた子局６ａ，・・・が省略されているが、各配電線２０４，２０６，２１２には、配電線４に設けられた子局６ａ，・・・同じように複数の子局が備えられており、これら子局ならびに親局２０５，２０７，２１３の構成はそれぞれ図３、図２に示したものと同様である。   4, the slave stations 6a,... Provided on the distribution line 4 shown in FIG. 1 are omitted, but each distribution line 204, 206, 212 has a child provided on the distribution line 4. Stations 6a,... Are similarly provided with a plurality of slave stations, and the configurations of these slave stations and the master stations 205, 207, 213 are the same as those shown in FIGS.

次に動作について説明する。   Next, the operation will be described.

配電線４で事故が発生した場合は、実施形態１で既に説明したように、親局５は自局で取得した事故時の端子３の電圧情報と、配電線４に設けられた各子局６から伝送されてきた事故時の配電線４の電圧情報を伝送手段を通じて事故点標定演算手段をそなえた事故点標定演算部７へ伝送する。事故点標定演算部７において親局５および各子局で取得された事故時の配電線各地の電圧情報を元に事故点の標定演算がなされる。   When an accident occurs in the distribution line 4, as already described in the first embodiment, the master station 5 obtains the voltage information of the terminal 3 at the time of the accident acquired by the own station and each slave station provided in the distribution line 4. The voltage information of the distribution line 4 at the time of an accident transmitted from 6 is transmitted through the transmission means to the accident point location calculation unit 7 provided with the accident point location calculation means. The accident point location calculation unit 7 calculates the location of the accident point based on the voltage information of each part of the distribution line at the time of the accident acquired by the master station 5 and each slave station.

配電線２１２で事故が発生した場合は、上記と同様、親局２１３は自局で取得した事故時の端子３の電圧情報と、配電線２１２に設けられた図示していない各子局から伝送されてきた事故時の配電線２１２の電圧情報を伝送手段を通じて事故点標定演算手段をそなえた事故点標定演算部７へ伝送する。事故点標定演算部７において親局２１３および各子局で取得された事故時の配電線２１２の各地点の電圧情報を元に事故点の標定演算がなされる。   When an accident occurs in the distribution line 212, the master station 213 transmits the voltage information of the terminal 3 at the time of the accident acquired by the own station and each slave station (not shown) provided in the distribution line 212 in the same manner as described above. The transmitted voltage information of the distribution line 212 at the time of the accident is transmitted to the accident point locating calculation unit 7 provided with the accident point locating calculating means through the transmission means. The accident point location calculation unit 7 calculates a fault point based on the voltage information of each point on the distribution line 212 obtained at the master station 213 and each slave station.

配電線２０４で事故が発生した場合も同様な動作となり、親局２０５は自局で取得した事故時の端子２０３の電圧情報と、配電線２０４に設けられた図示していない各子局から伝送されてきた事故時の配電線２０４の電圧情報を伝送手段を通じて事故点標定演算手段をそなえた事故点標定演算部７へ伝送する。事故点標定演算部７において親局２０５および各子局で取得された事故時の配電線２０４の各地点の電圧情報を元に事故点の標定演算がなされる。   When an accident occurs in the distribution line 204, the same operation is performed, and the master station 205 transmits the voltage information of the terminal 203 at the time of the accident acquired by the own station and each slave station (not shown) provided in the distribution line 204. The voltage information of the distribution line 204 at the time of the accident that has been transmitted is transmitted to the accident point location calculation unit 7 provided with the accident point location calculation unit through the transmission unit. The accident point location calculation unit 7 calculates the fault point location based on the voltage information of each point on the distribution line 204 obtained at the master station 205 and each slave station.

このようにこの発明の実施の形態２によれば、事故標定演算部７を、複数の配電系統２０４，２０６，２１２，・・・で共有することで、簡単な構成でより広域の事故監視が可能となる。この場合の事故点標定演算部７は、端子３を有する配電用変電所内、あるいは配電用変電所外の他の場所の何れに設置してもよい。   As described above, according to the second embodiment of the present invention, the accident orientation calculation unit 7 is shared by the plurality of power distribution systems 204, 206, 212,. It becomes possible. In this case, the accident point location calculation unit 7 may be installed either in the distribution substation having the terminal 3 or in another place outside the distribution substation.

なお図４では各配電線４，２１２それぞれに親局５，２１３を設けているが、配電線４と２１２は端子３を介して電気的につながっていることから、例えば配電線２１２に設けられた子局と親局５が配電線搬送通信手段を通じて通信することも可能である。この場合には親局は、親局５だけに集約することが出来、さらに簡単な構成となる。同様に端子２０３における配電系統も例えば親局２０５を代表として集約することが可能となり、さらに簡単な構成となる。
なお、本実施の形態は、前述のように、概念的には、前記標定演算手段は前記配電用変電所とは異なる地点に設けられるとともに、前記配電線の事故発生時には前記親局ならびに前記子局の電圧情報取得手段からの電圧情報を前記親局を介して前記標定演算手段に取り込むことを特徴とする配電線用事故点標定装置である。
また、更に上位概念では、前記親局が複数設けられ、これら各親局が収集した前記配電線の各地点の電圧情報のうち事故点にむかって減少する関係にある複数の電圧を見出しそれら電圧から事故点を標定する事故点標定システムである。 In FIG. 4, the master stations 5 and 213 are provided for the respective distribution lines 4 and 212. However, since the distribution lines 4 and 212 are electrically connected via the terminal 3, for example, the distribution lines 4 and 212 are provided on the distribution line 212. It is also possible for the slave station and the master station 5 to communicate with each other through the distribution line transfer communication means. In this case, the master station can be aggregated only in the master station 5, and the configuration becomes simpler. Similarly, the power distribution system at the terminal 203 can be aggregated with the master station 205 as a representative, for example, and the configuration is further simplified.
In the present embodiment, as described above, conceptually, the orientation calculation means is provided at a point different from the distribution substation, and the master station and the child are at the time of occurrence of an accident in the distribution line. An accident point locating device for distribution lines, wherein voltage information from a voltage information obtaining unit of a station is taken into the orientation calculating unit via the master station.
Further, in a higher level concept, a plurality of the master stations are provided, and a plurality of voltages having a relationship that decreases toward the accident point are found out of the voltage information at each point of the distribution line collected by each of the master stations. This is an accident point locating system for locating accident points.

実施の形態３．
以下、この発明の実施の形態３を、電圧情報のみから事故点評定する原理を説明するための配電線各地の電圧の状態を示す図５および図６によって説明する。図５および図６において、横軸は子局と端子（母線）との間の距離であり、縦軸は計測される電圧を表示する。各子局の電圧は、横軸の決まった位置にプロットされることになる。
本実施の形態３では、事故時の電圧情報を実効値として事故点標定演算処理を行う場合について説明する。 Embodiment 3 FIG.
Hereinafter, Embodiment 3 of the present invention will be described with reference to FIGS. 5 and 6 showing voltage states at various points in the distribution line for explaining the principle of evaluating an accident point from voltage information alone. 5 and 6, the horizontal axis represents the distance between the slave station and the terminal (bus), and the vertical axis represents the measured voltage. The voltage of each slave station is plotted at a fixed position on the horizontal axis.
In the third embodiment, a case will be described in which accident point location calculation processing is performed using voltage information at the time of an accident as an effective value.

図５に、まず参考として●印で正常時（事故が発生する以前）の各電圧をＶｆ’およびＶａ’，Ｖｂ’，・・・Ｖｅ’・・・で示している。実際にはこれらの電圧値は配電系統の負荷などにより基準値に対しある許容幅で分布しているが、ここでは簡単のため均一の電圧値で示している。
事故時の動作を、前述の図１における記号Ｆの位置で事故が生じた場合について以下にず５により説明する。なお、図５では配電系統を直接接地系として説明する。 In FIG. 5, for reference, each voltage at normal time (before an accident occurs) is indicated by Vf ′ and Va ′, Vb ′,... Ve ′. Actually, these voltage values are distributed with a certain tolerance with respect to the reference value due to the load of the distribution system, etc., but are shown here as uniform voltage values for simplicity.
The operation at the time of the accident will be described with reference to 5 in the case where an accident occurs at the position of the symbol F in FIG. In FIG. 5, the power distribution system is described as a direct grounding system.

図５で○印で示されるＶｆは親局５で、Ｖａ，Ｖｂ，・・・Ｖｅ，・・・は各子局６ａ，６ｂ，・・・６ｅ，・・・で、それぞれ同時刻に取得された事故時の電圧実効値を示している。事故時の配電線電圧は、図５に破線で例示してあるように配電用変電所の端子電圧Ｖｆより事故点にむかって低下していく（配電線の電圧は事故点に近づくほど低くなる）（例えば、Ｖａの測定点はＶｆの測定点より事故点に近く、Ｖｂの測定点はＶａの測定点より事故点に近いので、計測電圧Ｖｆ＞計測電圧Ｖａ＞計測電圧Ｖｂとなる）ので、破線で示す電圧の変化を確認することで図式的表現から配電線電圧が事故点電圧になる特異点を見出し事故点を標定することが可能である。つまり、電圧が最も低いＶｅから端子３へむかう経路上にある電圧Ｖａ，Ｖｂと端子電圧（母線電圧）Ｖｆとを線形近似した破線で示す電圧の推定線を用いて図式的表現から配電線電圧が事故点電圧になる特異点を見出し事故点を標定することが可能である。 Vf indicated by a circle in FIG. 5 is the master station 5, and Va, Vb,... Ve,... Are acquired at the same time by the slave stations 6a, 6b,. It shows the effective voltage value at the time of accident. The distribution line voltage at the time of the accident decreases from the terminal voltage Vf of the distribution substation toward the accident point as illustrated by the broken line in FIG. 5 (the voltage of the distribution line becomes lower as the accident point is approached). (For example, since the measurement point of Va is closer to the accident point than the measurement point of Vf, and the measurement point of Vb is closer to the accident point than the measurement point of Va, measurement voltage Vf> measurement voltage Va> measurement voltage Vb) By confirming the change of the voltage indicated by the broken line, it is possible to find the singular point where the distribution line voltage becomes the fault point voltage from the schematic representation and to determine the fault point. That is, the distribution line is represented from a schematic representation using a voltage estimation line indicated by a broken line obtained by linear approximation of the voltages V a and Vb on the path from the lowest voltage Ve to the terminal 3 and the terminal voltage (bus voltage) Vf. It is possible to find the singular point where the voltage becomes the accident point voltage and to determine the accident point.

図５の事例では、事故時の同時刻における配電線各地の電圧Ｖｆ，Ｖａ，Ｖｂを結ぶ直線（図示破線）は直線であるので、例えばこれら電圧Ｖａ，Ｖｂ，・・・Ｖｅ，・・・の各値の差から、一次式あるいは近似一次式ｙ＝−ａｘ＋Ｖｆ（但し、Ｖｆは端子３の電圧、ｘは端子からの距離、ｙは配電線の任意の地点の電圧）の傾きａを導出し、事故点電圧がほぼ零となる点を特異点とし事故点として推定する場合はｙ＝０となるｘを求めることで事故点を標定することが可能である。
ここで、一次式は事例であり、一次式以外の微分その他の数学的手法により、事故時の同時刻における配電線各地の電圧Ｖａ，Ｖｂ，・・・Ｖｅ，・・・から事故点を推定することもできる。図５では、電圧が最低のＶｅの地点から端子への経路上に無いＶｃとＶｄを電圧の近似式を求める上で使用しないが、Ｖｅから、端子３への経路からの分岐の位置の電圧として使用して電圧の近似式を求めてもよい。
なお、事故点標定に用いる電圧値であるが、地絡事故、短絡事故など事故の様相に応じ相電圧実効値、線間電圧実効値を使い分けるとよい。 In the example of FIG. 5, since the straight lines (broken lines in the figure) connecting the voltages Vf, Va, Vb at various points in the distribution line at the same time at the time of the accident are straight lines, for example, these voltages Va, Vb,. From the difference between these values, the slope a of the linear expression or approximate primary expression y = −ax + Vf (where Vf is the voltage at the terminal 3, x is the distance from the terminal, and y is the voltage at any point on the distribution line) is derived. When the point where the accident point voltage is almost zero is assumed as a singular point, the accident point can be determined by obtaining x where y = 0.
Here, the primary expression is an example, and the accident point is estimated from the voltages Va, Vb,... Ve,. You can also In FIG. 5 , Vc and Vd that are not on the path from the point of Ve having the lowest voltage to the terminal are not used in calculating the approximate expression of the voltage, but the voltage at the branch position from the path from Ve to the terminal 3 is not used. May be used to obtain an approximate expression for the voltage.
In addition, although it is a voltage value used for fault location, it is good to use a phase voltage effective value and a line voltage effective value properly according to the situation of accidents, such as a ground fault accident and a short circuit accident.

次に、事故点の抵抗（例えば地絡抵抗値）などが大きい場合は事故点標定演算結果に誤差が含まれるケースが想定される。図６はこの様子を示したものである。なお、図６において、図５と同じ電圧および同じの内容については図５と同一の記号あるいは同一の符号を付してある。   Next, when the resistance at the accident point (for example, ground fault resistance value) is large, a case where an error is included in the accident point location calculation result is assumed. FIG. 6 shows this state. In FIG. 6, the same voltage and the same contents as those in FIG. 5 are denoted by the same symbols or the same symbols as those in FIG. 5.

事故点に比較的大きな抵抗値が存在する場合、事故中には図６にＶＦＲとして示される残留電圧が事故点に生じる。 If a relatively large resistance value exists at the accident point, a residual voltage indicated as V FR in FIG. 6 is generated at the accident point during the accident.

この場合、前述のように図式的表現から配電線の残留電圧がほぼ零となる地点を特異点として標定すると図６に一点鎖線で示した標定をおこない誤差が生じる。これを補正する方法としては、同じく図６で破線で図式的に示しているように事故点より下流にある子局で得られた電圧情報Ｖｅを用いて補正することが可能である。換言すれば、補正する方法としては、同じく図６で破線で図式的に示しているように配電線か各地の電圧を端子３からの距離に応じて近似する線上に無く、最低の電圧の情報（ほぼ零ではない）が得られる地点の電圧（図６ではＶｅ）を用いて補正することが可能である。これは、事故点より下流にある配電線の各地点の電圧は、事故点の電圧とほぼ等しくなることによる。   In this case, as described above, if the point where the residual voltage of the distribution line is almost zero is determined as a singular point from the schematic representation, the determination indicated by the one-dot chain line in FIG. 6 is performed and an error occurs. As a method of correcting this, it is possible to correct using the voltage information Ve obtained at the slave station downstream from the accident point as schematically shown by the broken line in FIG. In other words, as a correction method, the voltage of the distribution line is not on the line that approximates the distance from the terminal 3 according to the distance from the terminal 3 as shown schematically by the broken line in FIG. It is possible to correct using the voltage (Ve in FIG. 6) at a point where (not nearly zero) is obtained. This is because the voltage at each point of the distribution line downstream from the accident point is almost equal to the voltage at the accident point.

図６の場合、簡単のため負荷などによる配電線の電圧変化が小さいとして電圧情報Ｖｅより水平に伸ばした破線と、電圧情報Ｖｂ，Ｖａ，Ｖｆを外挿した破線との交点を特異点とし事故点を標定しているが、経験的に得られている電力需要に基づき電圧情報Ｖｅより引き出す破線に想定される電力と配電線路定数から求まる適度な傾斜（電圧降下）を設けて特異点をもとめ事故点標定しても良い。つまり、負荷などによる配電線の電圧変化を模擬できる場合は、そのような模擬も考慮して特異点を求めて事故点を標定してもよい。   In the case of FIG. 6, for the sake of simplicity, it is assumed that the change in voltage of the distribution line due to the load is small and the intersection of the broken line extending horizontally from the voltage information Ve and the broken line extrapolating the voltage information Vb, Va, Vf is an singular point. Although the points are standardized, a moderate slope (voltage drop) obtained from the power assumed by the broken line drawn from the voltage information Ve and the distribution line constant based on the power demand obtained empirically and the singular point is obtained Accident point location may be used. That is, when the voltage change of the distribution line due to a load or the like can be simulated, the singular point may be obtained in consideration of such a simulation to determine the accident point.

なお、非接地系の配電系の場合についてはこの発明は短絡事故点評定に関するものになる。
なお、本実施の形態３は、前述のように、概念的には、前述の実施の形態１〜２において、電圧が漸減する方向に見て事故点より下流側の子局の電圧情報により補正して事故点を標定する事故点標定システムである。 In the case of a non-grounded distribution system, the present invention relates to short-circuit fault point evaluation.
As described above, the third embodiment is conceptually corrected by the voltage information of the slave station downstream of the accident point in the direction in which the voltage gradually decreases in the first and second embodiments. This is an accident point locating system for locating accident points.

実施の形態４．
以下、この発明の実施の形態４を、図７〜図１０により説明する。図７は親局の他の事例を示す図、図８は子局の他の事例を示す図、および図９は事故時の電圧・電流の波形を示す図、図１０は配電線各地の電圧の他の状態を示す図で、本実施の形態４における事故点評定の仕方を説明するための図である。
本実施の形態では、前述の実施の形態３の場合と同じく事故点の抵抗（例えば地絡抵抗値）などが大きく事故点標定演算結果に誤差が含まれることが想定される場合における該抵抗値の影響を低減する方法として、事故時の電圧情報として電圧情報取得地点での電流零時点の電圧瞬時値を用いる場合について説明する。 Embodiment 4 FIG.
The fourth embodiment of the present invention will be described below with reference to FIGS. 7 is a diagram showing another example of the master station, FIG. 8 is a diagram showing another example of the slave station, FIG. 9 is a diagram showing voltage / current waveforms at the time of the accident, and FIG. 10 is a voltage at each part of the distribution line. It is a figure which shows other states, and is a figure for demonstrating the method of accident point rating in this Embodiment 4. FIG.
In the present embodiment, as in the case of the above-described third embodiment, the resistance value in the case where the resistance at the accident point (for example, the ground fault resistance value) is large and an error is assumed to be included in the accident point location calculation result. As a method of reducing the influence of the above, a case will be described in which the voltage instantaneous value at the time of zero current at the voltage information acquisition point is used as voltage information at the time of the accident.

先ず、親局について図７で説明する。５’は本実施の形態に係る親局を示しており図２の親局５と比べ零点検出手段１６ｆが備わった点が異なる。１５ｆは端子３の電流を計測するＣＴで零点検出手段１６ｆに接続される。事故時に電圧情報収集装置１２ｆは、零点検出手段１６ｆから伝送される零点検出信号２２ｆに基づき、ＰＴ８ｆを介して電流零点時の端子３の電圧瞬時値を取得する。   First, the master station will be described with reference to FIG. Reference numeral 5 'denotes a master station according to the present embodiment, which is different from the master station 5 of FIG. 2 in that a zero point detecting means 16f is provided. Reference numeral 15f denotes a CT for measuring the current at the terminal 3, and is connected to the zero point detecting means 16f. At the time of the accident, the voltage information collecting device 12f acquires the instantaneous voltage value of the terminal 3 at the current zero point via the PT 8f based on the zero point detection signal 22f transmitted from the zero point detection means 16f.

次に、子局について図８で説明する。６ａ’は本実施の形態に係る子局を示しており図３の子局６と比べ零点検出手段１６ａが備わった点が異なる。１５ａは配電線４の電流を計測するＣＴで零点検出手段１６ａに接続される。事故時に電圧情報収集装置１２ａは、零点検出手段１６ａから伝送される零点検出信号２２ａに基づき、ＰＴ８ａを介して電流零点時の配電線４の電圧瞬時値を取得する。なお図１で説明した他の子局６ｂ，・・・６ｅ，・・・も本実施の形態４では前記子局６ａ’と同様の構成を有する子局とする。   Next, the slave station will be described with reference to FIG. Reference numeral 6a 'denotes a slave station according to the present embodiment, which is different from the slave station 6 of FIG. 3 in that the zero point detecting means 16a is provided. A CT 15a for measuring the current of the distribution line 4 is connected to the zero point detection means 16a. In the event of an accident, the voltage information collecting device 12a acquires the instantaneous voltage value of the distribution line 4 at the current zero point via the PT 8a based on the zero point detection signal 22a transmitted from the zero point detection means 16a. The other slave stations 6b,... 6e,... Described in FIG. 1 are also slave stations having the same configuration as the slave station 6a 'in the fourth embodiment.

次に電流零点時の電圧瞬時値を用いることにより事故点抵抗の影響を低減できる原理について説明する。
図９は配電線４上の事故点より端子側に位置する任意の地点における事故時の電流ＩＦおよび電圧ＶＦを簡単に示している。一般的には配電線路のリアクタンス成分により図に示すように電流ＩＦと電圧ＶＦは同位相ではなく遅れ電流位相となる。
電圧ＶＲおよび電圧ＶＸは事故時の電圧ＶＦを抵抗成分とリアクタンス成分に分解したものであり、図６で示したような事故抵抗により発生する事故時の残留電圧ＶＦＲは抵抗成分である電圧ＶＲに含まれる。 Next, the principle that the influence of the fault point resistance can be reduced by using the instantaneous voltage value at the current zero point will be described.
FIG. 9 simply shows the current IF and voltage V F at the time of an accident at an arbitrary point located on the terminal side of the accident point on the distribution line 4. Generally, the current IF and the voltage V F are not in phase but in a delayed current phase as shown in the figure due to the reactance component of the distribution line.
The voltage V R and the voltage V X are obtained by decomposing the voltage V F at the time of the accident into a resistance component and a reactance component, and the residual voltage V FR at the time of the accident generated by the accident resistance as shown in FIG. 6 is a resistance component. included in a certain voltage V R.

図９より明らかなように電流ＩＦが零点となる瞬間は電圧ＶＦに含まれる抵抗成分ＶＲは零となりリアクタンス成分ＶＸのみが存在する。したがって事故点標定に用いる電圧情報を電流零点における電圧瞬時値とすることで事故点抵抗値により生じる事故点の残留電圧ＶＦＲの影響を低減することが可能となり、図５と同様の事故点標定演算が図１０に破線で示すように電圧瞬時値の変化を確認することで図式的表現から配電線電圧が事故点電圧（ほぼ零）になる特異点を見出し事故点を標定することが可能である。このように電流零点時における電圧瞬時値を事故点標定演算に用いることで事故抵抗等の影響を低減でき精度良く標定できる。
なお、本実施の形態４は、前述のように、概念的には、前述の実施の形態１〜３において前記電圧情報が電流零点で計測した電圧情報である事故点標定システムである。 Moment the obvious way current I F from FIG. 9 is zero is the resistance component V R contained in the voltage V F is present only becomes zero reactance component V X. Therefore, by making the voltage information used for fault point location the instantaneous voltage value at the current zero point, it is possible to reduce the influence of the residual voltage V FR at the fault point caused by the fault point resistance value. It is possible to find the singular point where the distribution line voltage becomes the fault point voltage (nearly zero) from the schematic representation and identify the fault point by checking the change of the instantaneous voltage value as shown by the broken line in FIG. is there. Thus, by using the instantaneous voltage value at the time of the current zero for the accident point location calculation, the influence of the accident resistance or the like can be reduced and the location can be accurately performed.
As described above, the fourth embodiment is an accident point locating system that is conceptually the voltage information measured at the current zero point in the first to third embodiments.

実施の形態５．
以下、この発明の実施の形態５を、図１１により説明する。図１１は図６と同様な配電線各地の電圧の状態を示す図で、本実施の形態５における事故点評定の仕方を説明するための図である。 Embodiment 5 FIG.
The fifth embodiment of the present invention will be described below with reference to FIG. FIG. 11 is a diagram showing the voltage states at various locations on the distribution line similar to FIG. 6, and is a diagram for explaining the method of accident point evaluation in the fifth embodiment.

本実施の形態５は、複数の子局で得られたデータの信頼性を向上するものであり、以下具体的に説明する。   The fifth embodiment improves the reliability of data obtained by a plurality of slave stations, and will be specifically described below.

系統事故検出から、保護用開閉器が開放されるまでには一般的に３〜５サイクル（１サイクル＝１／商用周波数［秒］）の時間を要する。この期間中に各子局でデータを複数回取得し事故点標定演算部７（図１，図４参照）へ送付し、複数組のデータを元に事故点を標定するようにしたものである。
例えば親局は図２において、事故検出手段１１ｆからの事故発生情報に基づき、電圧情報収集装置１２ｆで複数回、例えば１サイクルの間隔をあけて２回、事故時の端子３の電圧情報を取得する。
同様に子局も図３において事故検出手段１１ａからの事故発生情報に基づき、電圧情報収集装置１２ａで複数回（親局と時間間隔、例えば１サイクルの間隔、をあけて２回）、事故時の配電線４の電圧情報を取得する。これら取得した電圧情報は、前述の各実施の形態と同様、事故点標定部７に転送される。 In general, it takes 3 to 5 cycles (1 cycle = 1 / commercial frequency [second]) from detection of a system fault until the protective switch is opened. During this period, data is acquired multiple times at each slave station and sent to the accident point location calculation unit 7 (see FIGS. 1 and 4), and the accident points are determined based on a plurality of sets of data. .
For example, in FIG. 2, based on the accident occurrence information from the accident detection means 11f, the master station acquires the voltage information of the terminal 3 at the time of the accident multiple times, for example, twice at intervals of one cycle by the voltage information collecting device 12f. To do.
Similarly, in FIG. 3, based on the accident occurrence information from the accident detection means 11a, the slave station uses the voltage information collecting device 12a a plurality of times (two times at intervals of the parent station, for example, one cycle). The voltage information of the distribution line 4 is acquired. The acquired voltage information is transferred to the accident point location unit 7 as in the above-described embodiments.

図１１は、図５と同様、図１の記号Ｆの位置で事故が生じたときの事故点標定の様相を示している。図１１でも配電系統は直接接地系として説明している。
図１１において、○印で示されるＶｆcは親局５で、Ｖａc，Ｖｂc，・・・Ｖｅcは各子局６ａ，６ｂ・・・６ｅで、それぞれ取得された事故時の電圧実効値を示している。
また△印で示されるＶｆtは親局５で、Ｖａt，Ｖｂt，・・・Ｖｅtは各子局６ａ，６ｂ，・・・６ｅで、それぞれ取得された事故時の電圧実効値であり、前記○印の電圧情報取得後、一定間隔（例えば１サイクル）後に取得された電圧情報を示している。 FIG. 11 shows the aspect of the accident point location when an accident occurs at the position of the symbol F in FIG. 1, as in FIG. Also in FIG. 11, the power distribution system is described as a direct grounding system.
In FIG. 11, Vfc indicated by a circle is the master station 5, and Vac, Vbc,... Vec are the slave stations 6a, 6b,. Yes.
Vft indicated by Δ is the master station 5, and Vat, Vbt,... Vet are the effective voltage values at the time of the accident respectively acquired by the slave stations 6a, 6b,. The voltage information acquired after a certain interval (for example, one cycle) after acquiring the voltage information of the mark is shown.

事故時の配電線電圧は配電用変電所の端子電圧Ｖｆより事故点にむかってＶａ，Ｖｂと順次低下していくので同図に破線、一点鎖線で示すように電圧の変化を確認することで図式的表現から配電線電圧が事故点電圧になる特異点を見出し事故点を標定することが可能である。
図５では事故点電圧がほぼ零となる点を特異点とし事故点として推定している。
図１１の場合、○印の電圧情報から標定される事故点(○)と、△印の電圧情報から標定さられる事故点(△)の間に事故点が存在する可能性が高いことが期待される。このような標定される事故点のばらつきは、事故時の電圧情報には事故直後の過渡現象が含まれるために生じる。ここで述べたように複数組の電圧情報を元に事故点を標定することで、このようなばらつきを加味した標定が可能となる。 The distribution line voltage at the time of the accident gradually decreases to Va and Vb from the terminal voltage Vf of the distribution substation toward the accident point, so by confirming the voltage change as shown by the broken line and the alternate long and short dash line in the figure It is possible to find the singular point where the distribution line voltage becomes the fault point voltage from the schematic representation and to determine the fault point.
In FIG. 5, the point where the accident point voltage becomes almost zero is assumed as a singular point and estimated as an accident point.
In the case of FIG. 11, it is expected that there is a high possibility that an accident point exists between the accident point (◯) determined from the voltage information indicated by ○ and the accident point (Δ) determined from the voltage information indicated by Δ. Is done. Such a variation in the determined accident point occurs because the voltage information at the time of the accident includes a transient phenomenon immediately after the accident. As described here, the fault point is determined based on a plurality of sets of voltage information, so that it is possible to perform the determination in consideration of such variations.

なお、データの取得間隔を例えば半サイクル以下とすれば３〜５回以上の電圧情報を基に標定することも可能である。事故点評定に用いる電圧値は地絡事故、短絡事故など事故の様相に応じ相電圧実効値、線間電圧実効値を使い分けるとよい。また非接地系統においては本実施の形態は短絡事故点標定に関するものとなる。
なお、本実施の形態１は、前述のように、概念的には、前述の実施の形態１〜４において、事故時の最初の測定による前記配電線の各地点の電圧情報による事故点標定と、前記最初の測定時点より所定時間後に測定した各地点の電圧情報による事故点標定とを行う事故点標定システムである。 In addition, if the data acquisition interval is set to, for example, a half cycle or less, it is possible to standardize based on voltage information of 3 to 5 times or more. It is recommended that the voltage value used for the accident point evaluation is selected according to the phase voltage effective value and the line voltage effective value depending on the state of the accident such as a ground fault or short circuit accident. In the case of a non-grounded system, this embodiment relates to short-circuit fault location.
In addition, as described above, the first embodiment is conceptually the fault point location based on the voltage information of each point of the distribution line by the first measurement at the time of the accident in the first to fourth embodiments. An accident point locating system that performs fault point locating based on voltage information at each point measured after a predetermined time from the first measurement time point.

実施の形態６．
以下、この発明の実施の形態６を図１２および図１３により説明する。図１２は他の配電系における事故点標定システムの事例を示す図、図１３は配電線各地の電圧の他の状態を示す図で、本実施の形態６における事故点評定の仕方を説明するための図である。 Embodiment 6 FIG.
A sixth embodiment of the present invention will be described below with reference to FIGS. FIG. 12 is a diagram illustrating an example of an accident point locating system in another distribution system, and FIG. 13 is a diagram illustrating another state of voltages at various locations in the distribution line, in order to explain the method of rating an accident point in the sixth embodiment. FIG.

本実施の形態６は、配電系統に分散型電源などの可変電源端が存在するときの事故点評定の事例であり、以下具体的に説明する。   The sixth embodiment is an example of accident point evaluation when a variable power source such as a distributed power source exists in the power distribution system, and will be specifically described below.

図１２において３０１は例えばディーゼル発電機などの分散型電源で、配電系統の幹線４ａの図中右端付近に接続されている。なお、図１２において、図１と同一または相当部分には図１と同一の符号を付してある。
図１３は前述の実施の形態１と同様の手順で取得した電圧情報を示したもので、図５と同様、まず参考として●印で正常時（事故が発生する以前）の各電圧をＶｆ’，Ｖａ’・・・Ｖｅ’で示している。実際にはこれらの電圧値は配電系統の負荷などにより基準値に対しある許容幅で分布しているが、ここでは簡単のため均一の電圧値で示している。 In FIG. 12, reference numeral 301 denotes a distributed power source such as a diesel generator, which is connected near the right end of the main line 4a of the distribution system in the figure. In FIG. 12, the same reference numerals as those in FIG.
FIG. 13 shows voltage information obtained by the same procedure as in the first embodiment. As in FIG. 5, first, as a reference, each voltage at normal time (before an accident occurs) is indicated by Vf ′. , Va ′... Ve ′. Actually, these voltage values are distributed with a certain tolerance with respect to the reference value due to the load of the distribution system, etc., but are shown here as uniform voltage values for simplicity.

事故時の動作として、図１２の記号Ｆ’の位置で事故が生じた場合について説明する。
図１３で○印で示されるＶｆは親局５で、Ｖａ，・・・Ｖｅは各子局６ａ，・・・６ｅで、それぞれ取得された事故時の電圧実効値を示している。事故時の配電線電圧は配電用変電所の端子電圧Ｖｆより事故点にむかってＶａ，Ｖｂと順次低下していくので、図５では配電系統を直接接地系として説明する。同図に破線で示すように電圧の変化を確認することで図式的表現から配電線電圧が事故点電圧になる特異点を見出し事故点を標定することが可能である。 As an operation at the time of an accident, a case where an accident occurs at the position of the symbol F ′ in FIG. 12 will be described.
Vf indicated by a circle in FIG. 13 is the master station 5, and Va,... Ve are the slave station 6a,. Since the distribution line voltage at the time of the accident gradually decreases toward Va and Vb from the terminal voltage Vf of the distribution substation toward the accident point, the distribution system will be described as a direct grounding system in FIG. By confirming the change in voltage as indicated by the broken line in the figure, it is possible to find a singular point where the distribution line voltage becomes the fault point voltage from the schematic representation and to determine the fault point.

即ち、事故点評定部７において、親局で計測の電圧Ｖｆと子局６ａで計測した電圧Ｖａとから事故点を評定すると共に、子局６ｃで計測した電圧Ｖｃと子局６ｂで計測した電圧Ｖｂとから事故点を標定する。つまり、配電線における事故点Ｆ’の一方の側の配電線各地の電圧から事故点を標定すると共に、配電線における事故点Ｆ’の他方の側の配電線各地の電圧からも事故点を標定することで、事故点をより的確に標定することができる。換言すれば、電圧が最も低くなる地点よりよりも端子３から遠い側により高い電圧の地点がある場合には、最も低い電圧情報の地点から端子３とは反対側にあるより高い電圧情報がある地点への経路上にある配電線の各地点での電圧を近似する式も求め、それも用いて事故点を標定することで、事故点をより的確に標定することができる。
なお、図１３では事故点電圧がほぼ零となる点を特異点とし事故点として推定している。
なお、事故点標定に用いる電圧値であるが、地絡事故、短絡事故など事故の様相に応じ相電圧実効値、線間電圧実効値を使い分けるとよい。
なお、非接地系の場合についてはこの発明は短絡事故点評定に関するものになる。
なお、本実施の形態６は、前述のように、概念的には、前述の実施の形態１〜５において、配電線における事故点の一方の側の配電線各地の電圧から事故点標定を行うと共に、配電線における事故点の他方の側の配電線各地の電圧からも事故点を標定する事故点標定システムである。
なお、ＶｄはＶｅよりも端子３からの距離は遠いが、Ｖｃよりも端子側で分岐した幹線上にあるので、端子３から近い側にあると判断する。 That is, the accident point rating unit 7 evaluates the accident point from the voltage Vf measured at the master station and the voltage Va measured at the slave station 6a, and the voltage Vc measured at the slave station 6c and the voltage measured at the slave station 6b. Accident points are determined from Vb. In other words, the fault point is determined from the voltage at each side of the distribution line on the one side of the fault point F ′ on the distribution line, and the fault point is also determined from the voltage at the other side of the distribution line on the other side of the fault point F ′ on the distribution line. By doing so, the accident point can be more accurately located. In other words, if there is a higher voltage point on the side farther from the terminal 3 than the point where the voltage is lowest, there is higher voltage information on the opposite side of the terminal 3 from the lowest voltage information point. By calculating an equation that approximates the voltage at each point of the distribution line on the route to the point, and using it to determine the accident point, the accident point can be determined more accurately.
In FIG. 13, the point where the accident point voltage is almost zero is assumed as a singular point and estimated as the accident point.
In addition, although it is a voltage value used for fault location, it is good to use a phase voltage effective value and a line voltage effective value properly according to the situation of accidents, such as a ground fault accident and a short circuit accident.
In the case of a non-grounding system, the present invention relates to short-circuit fault point evaluation.
In addition, as described above, in the sixth embodiment, conceptually, in the first to fifth embodiments described above, the fault point is determined from the voltages at the distribution lines on one side of the fault point in the distribution line. At the same time, it is an accident point locating system for locating the accident point from the voltage of each part of the distribution line on the other side of the accident point in the distribution line.
Note that Vd is far from the terminal 3 than Ve, but is on the trunk branched on the terminal side from Vc, so it is determined that it is closer to the terminal 3.

実施の形態７． Embodiment 7. FIG.

以下、この発明の実施の形態７を図１４により説明する。図１４は配電線各地の電圧の他の状態を示す図で、本実施の形態７における事故点評定の仕方を説明するための図である。   A seventh embodiment of the present invention will be described below with reference to FIG. FIG. 14 is a diagram illustrating another state of voltages at various points in the distribution line, and is a diagram for explaining a method of accident point evaluation according to the seventh embodiment.

本実施の形態７では、実施形態３において標定演算手段に取り込まれる電圧情報が電力線搬送通信手段による通信が確立できなくなる等の原因で欠損となった場合に、該情報欠損状況も加味して事故点を標定する方法について説明する。   In the seventh embodiment, when the voltage information taken into the orientation calculation means in the third embodiment is lost due to the failure to establish communication by the power line carrier communication means, the accident is also considered with the information loss situation. A method for locating the points will be described.

事故時の電圧情報は事故発生中に電力線搬送通信手段で伝送する場合と、事故発生後従来例で記述したように保護リレーにより系統端部の開閉器が開放動作を行った後に電力線搬送通信手段で伝送する場合が想定される。電力線搬送通信が確立できない可能性としては、例えば事故発生中であれば事故点が通信の障害となる可能性がある。また開閉器解放後に伝送する場合では事故が永久事故などの場合同じく事故点が通信の障害となる可能性がある。このような場合は得られた電圧情報から事故点標定演算を行うこととなるが、情報欠損状況も加味して事故点を標定する方法について述べる。   Voltage information at the time of the accident is transmitted by the power line carrier communication means during the accident occurrence, and after the accident occurs, the power line carrier communication means after the switch at the end of the system is opened by the protective relay as described in the conventional example It is assumed that data will be transmitted using As a possibility that the power line carrier communication cannot be established, for example, if an accident occurs, the accident point may become a communication failure. In the case of transmission after the switch is released, if the accident is a permanent accident or the like, the accident point may become a communication failure. In such a case, an accident point location calculation is performed from the obtained voltage information. A method for locating the accident point will be described in consideration of the information loss situation.

図１４は前述の実施形態３で述べた図５と同じケースにおける電圧実効値の取得状況を示す。ただし図１４においては電圧情報Ｖｅが情報欠損となっている。得られた電圧情報Ｖｂ，Ｖａ，Ｖｆにより標定される事故点は電圧情報Ｖｅが欠損しているため、図５のように事故点残留電圧の影響は補正できず、図式的表現から図１４に示す事故点（補正前）となる。図１４のように事故点評定部７で標定された事故点の位置が、情報欠損となっている子局（このばあい６ｅ）の「端子−子局間距離」より離れている場合は、事故により情報欠損となっていると仮定し事故点位置を子局６ｅの「端子-子局間距離」位置に相当する図１４の事故点（補正後）のように事故点評定部７で補正することが可能となる。
なお、本実施の形態７は、前述のように、概念的には、前述の実施の形態１〜６において、前記標定演算手段に取り込まれる電圧情報が前記電力線搬送通信手段による通信が確立しなくて欠損となった場合には、該情報欠損状況も加味して事故点を標定するようにした配電線用事故点標定装置である。
また、更に上位概念では、前述の実施の形態１〜６において、事故により電圧情報が欠損した子局の位置により補正して事故点を標定する事故点標定システムである。 FIG. 14 shows the acquisition state of the effective voltage value in the same case as FIG. 5 described in the third embodiment. However, in FIG. 14, the voltage information Ve is missing information. Since the fault information determined by the obtained voltage information Vb, Va, Vf lacks the voltage information Ve, the influence of the fault point residual voltage cannot be corrected as shown in FIG. The accident point shown (before correction). As shown in FIG. 14, when the position of the accident point determined by the accident point rating unit 7 is far from the “terminal-slave station distance” of the slave station (in this case, 6e) that is missing information, Assuming that information has been lost due to an accident, the accident point position is corrected by the accident point evaluation unit 7 as shown in the accident point (after correction) in FIG. 14 corresponding to the “distance between terminals and slave stations” position of the slave station 6e. It becomes possible to do.
As described above, in the seventh embodiment, conceptually, in the first to sixth embodiments described above, the voltage information taken into the orientation calculation unit does not establish communication by the power line carrier communication unit. In this case, the accident point locating device for distribution lines is adapted to determine the accident point in consideration of the information loss situation.
Further, the higher level concept is the accident point locating system that corrects the position of the slave station in which the voltage information is lost due to the accident in the above-described first to sixth embodiments and locates the accident point.

実施の形態８．
以下、この発明の実施の形態８を、図１５〜図１７により説明する。図１５は親局および各子局での各使用搬送波周波数の周波数帯域を配電線上の各局と対応付けて示す図、図１６は親局の内部構成を示す図、図１７は子局の内部構成を示す図である。
本実施の形態では、電力線搬送通信手段の搬送波の周波数帯域を複数の通信帯域に分割して、複数に分割した通信帯域を複数の子局に設けられた電力線搬送通信手段にそれぞれ割り当てる場合について説明する。 Embodiment 8 FIG.
Embodiment 8 of the present invention will be described below with reference to FIGS. FIG. 15 is a diagram showing the frequency band of each carrier frequency used in the master station and each slave station in association with each station on the distribution line, FIG. 16 is a diagram showing the internal configuration of the master station, and FIG. 17 is the internal configuration of the slave station FIG.
In the present embodiment, the case where the carrier frequency band of the power line carrier communication means is divided into a plurality of communication bands, and the divided communication bands are respectively assigned to the power line carrier communication means provided in the plurality of slave stations. To do.

図１５において、電源１、送電系統２、配電用変電所内の端子３、高圧配電線４、事故点標定演算手段を備えた事故点標定部７は図１と同様である。５”は配電用変電所内に設けられた親局である。配電線上の複数個の子局６ａ”・・・６ｅ”の内部構成は、図１７に代表的に例示する子局６”の構成となっている。配電線４および端子３の電圧を計測するためのＰＴ８ａ・・・８ｆは、各子局６ａ”・・・６ｅ”および親局５”に接続されている。後述する電力線搬送通信手段による通信信号を配電線４および端子３に対し注入したり抽出したりする信号結合器９ａ・・・９ｆは、各子局６ａ”・・・６ｅ”および親局５“に接続されている。 In FIG. 15, the power point 1, the power transmission system 2, the terminal 3 in the distribution substation, the high voltage distribution line 4, and the accident point location unit 7 including the accident point location calculation means are the same as those in FIG. 5 "is a master station provided in power distribution substations. Plurality of slave stations 6a distribution lines" · · · 6e "internal configuration of the slave station 6 illustrating representatively in FIG. 1 7" of It has a configuration. PT 8a... 8f for measuring the voltage of distribution line 4 and terminal 3 are connected to each slave station 6a "... 6e" and master station 5 ". Communication signal by power line carrier communication means to be described later Are coupled to the distribution line 4 and the terminal 3, and signal couplers 9a to 9f are connected to the slave stations 6a "to 6e" and the master station 5 ".

親局５”について説明する。図１６において、配電用変電所内の端子３、高圧配電線４、親局５”に設けられたは事故検出手段１１ｆ、電圧情報取得手段１２ｆ、電力線搬送通信手段１３ｆ、事故点標定演算手段を備えた事故点標定演算部７と情報伝送を行うための伝送手段１４は図２と同様である。親局５”にはフィルタ手段１７ｆが設けられている。   The master station 5 ″ will be described. In FIG. 16, the accident detection means 11f, voltage information acquisition means 12f, and power line carrier communication means 13f provided in the terminal 3, the high-voltage distribution line 4, and the master station 5 ″ in the distribution substation. The accident point location calculation unit 7 provided with the accident point location calculation means and the transmission means 14 for transmitting information are the same as in FIG. The master station 5 ″ is provided with filter means 17f.

子局６”について説明する。図１７において、配電線４、子局６ａ”に備えられた事故検出手段１１ａ、電圧情報取得手段１２ａ、電力線搬送通信手段１３ａは図３と同様である。子局６ａ”にはフィルタ手段１７ａが設けられている。なお配電線上に複数個設けられている他の子局６ｂ”・・・６ｅ”も子局６ａ”と同じ構成となっている。   The slave station 6 ″ will be described. In FIG. 17, the accident detection means 11a, the voltage information acquisition means 12a, and the power line carrier communication means 13a provided in the distribution line 4 and the slave station 6a ″ are the same as those in FIG. The slave station 6a ″ is provided with filter means 17a. The other slave stations 6b ″... 6e ″ provided on the distribution line have the same configuration as the slave station 6a ″.

図１５には、電力線搬送通信手段１３の搬送波の周波数帯域を複数の通信帯域ｆ１・・・ｆ５に分割して、複数に分割したこれら通信帯域を複数の子局６ａ”・・・６ｅ”に設けられた電力線搬送通信手段にそれぞれ割り当てられている様子を示している。ここでは一例として子局６ａ”に帯域ｆ５が、６ｂ”に帯域ｆ４が、６ｃ”に帯域ｆ２が、６ｄ”に帯域ｆ３が、６ｅ”に帯域ｆ１がそれぞれ割り当てられている。これら割り当てられた通信帯域の信号のみを電力線搬送通信手段に送受信可能とするフィルタ手段１７ａ・・・１７ｅが各子局にそれぞれ備えらえており、各子局６ａ”・・・６ｅ”に設けられた電力線搬送通信手段はそれぞれ割り当てられた通信帯域で互いに干渉しあうことなく親局５”に設けられた電力線搬送通信手段１３ｆと同時に通信することが可能となる。   In FIG. 15, the frequency band of the carrier wave of the power line carrier communication means 13 is divided into a plurality of communication bands f1... F5, and these divided communication bands are divided into a plurality of slave stations 6a ″. It shows a state where the power line carrier communication means provided is assigned to each. Here, as an example, the band f5 is allocated to the slave station 6a ″, the band f4 is allocated to 6b ″, the band f2 is allocated to 6c ″, the band f3 is allocated to 6d ″, and the band f1 is allocated to 6e ″. Filter units 17a... 17e that enable transmission / reception of only signals in the communication band to / from the power line carrier communication means are provided in each of the slave stations, and the power line carrier communication provided in each of the slave stations 6a ″. The means can communicate simultaneously with the power line carrier communication means 13f provided in the master station 5 ″ without interfering with each other in the assigned communication bands.

同時に通信できることにより通信時間の短縮化が可能であり、事故中に電圧情報を転送する場合など限られた時間で情報を伝送する場合に、より有益となる。   Communication time can be shortened by being able to communicate at the same time, which is more useful when information is transmitted in a limited time such as when voltage information is transferred during an accident.

フィルタ手段１７は当該通信帯域だけを通過させる帯域フィルタでよいが、通信帯域ｆ１やｆ５などの場合は低域通過フィルタ、高域通過フィルタなどでも良い。また図１５の例のような場合、親局５”には特にフィルタ手段１７ｆを備えていなくても同様の効果が得られる。   The filter unit 17 may be a band filter that allows only the communication band to pass. However, in the case of the communication band f1 or f5, a low-pass filter, a high-pass filter, or the like may be used. In the case of the example of FIG. 15, the same effect can be obtained even if the master station 5 ″ is not particularly provided with the filter means 17f.

また電力線搬送通信手段１３の通信帯域は広いほど多数の通信帯域に分割できる可能性が高くなるので、いわゆる広帯域（ブロードバンド）通信タイプの電力線搬送通信手段のほうが比較的容易に本実施の形態の効果を得やすい。   Further, the wider the communication band of the power line carrier communication means 13, the higher the possibility that it can be divided into a large number of communication bands. Therefore, the power line carrier communication means of the so-called broadband communication type is relatively easy. Easy to get.

なお、本実施の形態８は、前述の実施の形態１〜７の何れにも、また、他の事故点標定システムにも適用できる。
また、本実施の形態１は、前述のように、概念的には、前述の実施の形態１〜７において、前記電力線搬送通信手段の搬送波の周波数帯域を複数の通信帯域に分割して、該複数に分割した通信帯域を前記複数の子局に設けられた電力線搬送通信手段にそれぞれ割り当てるとともに当該通信帯域の信号のみを電力線搬送通信手段に送受信可能とするフィルタ手段を前記複数の子局にそれぞれ備え、前記複数の子局に設けられた電力線搬送通信手段はそれぞれ割り当てられた通信帯域で同時に前記親局に設けられた電力線搬送通信手段と通信する配電線用事故点標定装置である。
また、更に上位概念では、前述の実施の形態１〜７において、前記親局で収集される前記各子局の電圧情報の各搬送周波数を何れも異なる周波数とする事故点標定システムである。 The eighth embodiment can be applied to any of the first to seventh embodiments described above and also to other accident point locating systems.
Further, as described above, the first embodiment is conceptually divided into a plurality of communication bands by dividing the frequency band of the carrier wave of the power line carrier communication means in the first to seventh embodiments. Each of the plurality of slave stations is provided with filter means for allocating the divided communication bands to the power line carrier communication means provided in the plurality of slave stations and enabling transmission / reception of only signals in the communication band to the power line carrier communication means. The power line carrier communication means provided in the plurality of slave stations is an accident point locating device for distribution lines that communicates with the power line carrier communication means provided in the master station at the same time in each assigned communication band.
Further, the higher level concept is an accident point locating system in which the carrier frequencies of the voltage information of each slave station collected in the master station are different frequencies in the first to seventh embodiments.

実施の形態９．
次に、複数の子局に設けられた電力線搬送通信手段に割り当てられる通信帯域の割り振り方について説明する。 Embodiment 9 FIG.
Next, a method for allocating communication bands assigned to power line carrier communication means provided in a plurality of slave stations will be described.

図１５では子局６ａ”に周波数帯域ｆ５を、６ｂ”に周波数帯域ｆ４を、６ｃ”に周波数帯域ｆ２を、６ｄ”に周波数帯域ｆ３を、６ｅ”に周波数帯域ｆ１を割り当ててあるが、配電線が絶縁電線や被覆電線の場合は、端子３−子局６”間の距離が遠くなるほど、より低周波の通信帯域となるように、つまりｆ１＜ｆ２＜ｆ３＜ｆ４＜ｆ５となるように周波数帯域を割り当てるほうが好ましい。   In FIG. 15, the frequency band f5 is allocated to the slave station 6a ″, the frequency band f4 is allocated to 6b ″, the frequency band f2 is allocated to 6c ″, the frequency band f3 is allocated to 6d ″, and the frequency band f1 is allocated to 6e ″. When the electric wire is an insulated wire or a covered electric wire, the farther the distance between the terminal 3 and the slave station 6 ″ is, the lower the communication band is, that is, f1 <f2 <f3 <f4 <f5. It is preferable to assign a frequency band.

電力線搬送通信における搬送信号の減衰要因には種々考えられるが、そのひとつに配電線が絶縁電線や被覆電線のように絶縁物で覆われている場合の誘電体損があげられる。誘電体損は搬送周波数に比例するため、誘電体損を小さくするためには前述のように電圧情報の通信距離が遠くなるほど低周波の通信帯域が割り当てられるようにしたほうが電力線搬送通信手段の通信帯域をより有効に活用することができる。
なお、本実施の形態９は、前述のように、概念的には、前述の実施の形態１〜８において、前記複数の子局に設けられた電力線搬送通信手段に割り当てられる通信帯域は、親局に設けられた電力線搬送通信手段に対し、その通信距離が遠くなるほど低周波の通信帯域が割り当てられるようにした配電線用事故点標定装置である。
なお、前述の実施の形態では、電圧情報を電圧の実効値とした場合を例示したが、電圧の瞬時値、その他の値としてもよい。 There are various causes for the attenuation of the carrier signal in the power line carrier communication, and one of them is a dielectric loss when the distribution line is covered with an insulator such as an insulated wire or a covered wire. Since the dielectric loss is proportional to the carrier frequency, in order to reduce the dielectric loss, it is better to allocate a low frequency communication band as the communication distance of voltage information becomes longer as described above. Bandwidth can be utilized more effectively.
As described above, in the ninth embodiment, conceptually, in the first to eighth embodiments, the communication band allocated to the power line carrier communication means provided in the plurality of slave stations is the parent band. This is a distribution line accident point locating device in which a low-frequency communication band is assigned to a power line carrier communication means provided in a station as the communication distance increases.
In the above-described embodiment, the case where the voltage information is the effective value of the voltage is exemplified, but an instantaneous value of the voltage or other values may be used.

実施の形態１０．
以下、この発明の実施の形態１０を、親局と保護リレーとを機能的に関連付けた事例を示す図１８により説明する。 Embodiment 10 FIG.
A tenth embodiment of the present invention will be described below with reference to FIG. 18 showing an example in which a master station and a protection relay are functionally associated.

前述の実施の形態１においては親局５に事故検出手段１１ｆを設けた場合を例示したが、事故検出手段１１ｆを設ける代わりに配電用変電所内に設けられている保護リレーの動作信号を事故点標定システムの事故検出信号２１ｆとして用いても同様の効果が得られる。その事例が本実施の形態１０であり、図１８に示すように、図２に例示した親局５に加え、配電用変電所に設けられ事故検出手段１１ｆ’を有する従来の保護リレー３００を備えている。前記事故検出手段１１ｆ’には、前記保護リレー３００用のＰＴ（計器用変圧器）８ｆ’の出力が入力される。前記ＰＴ８ｆ’は前記端子（母線）の電圧を計測するものである。
なお、事故検出手段１１ｆ’は、Ｆａｕｌｔ Ｄｅｔｅｃｔｏｒ（略称ＦＤ）とも言われ、図１８では略称ＦＤをブロック内に表記してある。 In the first embodiment described above, the case where the accident detection means 11f is provided in the master station 5 is exemplified. However, instead of providing the accident detection means 11f, the operation signal of the protection relay provided in the distribution substation is used as the accident point. The same effect can be obtained even if it is used as the accident detection signal 21f of the orientation system. An example of this is the tenth embodiment. As shown in FIG. 18, in addition to the master station 5 illustrated in FIG. 2, a conventional protection relay 300 having an accident detection means 11f ′ provided in the distribution substation is provided. ing. The accident detection means 11f ′ receives the output of the PT (instrument transformer) 8f ′ for the protection relay 300. The PT 8 f ′ measures the voltage at the terminal (bus).
The accident detection means 11f ′ is also referred to as “Fault Detector” (abbreviation FD). In FIG. 18, the abbreviation FD is shown in the block.

本実施の形態１０の場合、図２と異なり親局５には事故検出手段１１ｆが設けられていない。つまり、親局５に必要な事故検出手段は、保護リレー３００に具備されている事故検出手段１１ｆ’の出力を利用する構成としてある。   In the case of the tenth embodiment, unlike FIG. 2, the master station 5 is not provided with the accident detection means 11f. In other words, the accident detection means necessary for the master station 5 is configured to use the output of the accident detection means 11 f ′ provided in the protection relay 300.

次に動作について説明する。   Next, the operation will be described.

図１８において、事故検出手段１１ｆ’は、例えば従来から用いられている不足電圧検出装置と同様のもので、ＰＴ８ｆ’に接続され端子３の電圧を監視するとともに事故発生時にはその発生を検出する。この事故検出手段１１ｆ’の事故検出情報を矢印２１ｆ’で示すように、親局５の電圧情報収集装置１２ｆへも送信することで親局５は前述の実施の形態１と同様な動作を行うことができ、前述の実施の形態１と同様の効果が得られ、しかも事故点標定システムはその親局５に事故検出手段１１ｆを設けなくて済む分安価に構成できる。 In FIG. 18, an accident detection means 11f ′ is the same as a conventional undervoltage detection device, for example, and is connected to PT8f ′ to monitor the voltage at the terminal 3 and detects the occurrence of an accident. 'The fault detection information of the arrow 2 1f' accident detecting means 11f as shown in, the master station 5 is the same as in the first embodiment operates in also transmitted to the voltage information collection device 12f of the master station 5 The same effects as those of the first embodiment can be obtained, and the accident point locating system can be constructed at a low cost because the master station 5 does not need to provide the accident detection means 11f.

実施の形態１１．
以下、この発明の実施の形態１１を、親局と保護リレーとを機能的に関連付けた他の事例を示す図１９により説明する。 Embodiment 11 FIG.
The eleventh embodiment of the present invention will be described below with reference to FIG. 19 showing another example in which the master station and the protection relay are functionally associated.

前述の実施の形態１０では、親局５のＰＴ８ｆを、親局専用に設けた事例を示してあるが、本実施の形態１１では、図１９に示すように、親局専用のＰＴ８ｆを設けずに、保護リレー３００のＰＴ８ｆ’を親局５の電圧情報取得装置として利用するようにしたものである。即ち、本実施の形態１１は、保護リレー３００のＰＴ８ｆ’を、保護リレー３００と事故点標定システムの親局５とに兼用するものである。 In Embodiment 10 described above, the PT 8f master station 5, but are shown examples provided in the master station only, the present embodiment 11, as shown in FIG. 19, the master station dedicated PT 8f Without being provided, PT 8f ′ of the protection relay 300 is used as a voltage information acquisition device of the master station 5. That is, in the eleventh embodiment, PT 8f ′ of the protection relay 300 is used both as the protection relay 300 and the master station 5 of the accident point location system.

本実施の形態１１によれば、前述の実施の形態１０に比べ、事故点標定システムは、その親局５に専用のＰＴ８ｆを設けなくて済む分安価に構成できる。 According to the eleventh embodiment, compared with the tenth embodiment described above, the accident point location system can be configured at a lower cost because the dedicated station 8 does not need to be provided with a dedicated PT 8f.

実施の形態１２．
以下、この発明の実施の形態１２を、親局と保護リレーとを機能的に関連付けた更に他の事例を示す図２０により説明する。 Embodiment 12 FIG.
The twelfth embodiment of the present invention will be described below with reference to FIG. 20 showing still another example in which the master station and the protection relay are functionally associated.

前述の実施の形態１においては親局５に電圧情報収集手段１２ｆを設けた場合を例示したが、電圧情報収集手段１２ｆを設ける代わりに配電用変電所内に設けられている保護リレーの電圧情報収集機能を事故点標定システムの電圧情報収集手段１２ｆとして用いても同様の効果が得られる。その事例が本実施の形態１２である。   In the first embodiment described above, the case where the voltage information collecting unit 12f is provided in the master station 5 is illustrated. However, instead of providing the voltage information collecting unit 12f, the voltage information collection of the protection relay provided in the distribution substation is performed. The same effect can be obtained even when the function is used as the voltage information collecting means 12f of the accident point location system. This case is the twelfth embodiment.

図２０において、４００は配電用変電所内に設けられている保護リレーで、ＡＤ変換（Ａｎａｌｏｇ ｔｏ Ｄｉｇｉｔａｌ Ｃｏｎｖｅｒｔｅｒ（略称Ａ／Ｄ））機能を含む電圧情報取込手段３５１と、この電圧情報取込手段３５１で取り込んだ電圧情報を演算処理する演算処理装置３５２と、事故検出手段３５３とを有している。
前記演算処理装置３５２は、保護リレー４００のリレー演算機能と前述の実施の形態１における電圧情報取得手段１２ｆの機能とを有している。
従って、前述の図２と異なり、事故点標定システムの親局５には事故検出手段１１ｆおよび電圧情報取得手段１２ｆは設けられていない。
なお、電圧情報取込手段３５１は、図２０における該当ブロック内にＡ／Ｄと表記してある。 In FIG. 20, reference numeral 400 denotes a protection relay provided in the distribution substation, voltage information capturing means 351 including an AD conversion (Analog to Digital Converter (abbreviated as A / D)) function, and this voltage information capturing means. An arithmetic processing unit 352 that performs arithmetic processing on the voltage information acquired in 351 and an accident detection unit 353 are provided.
The arithmetic processing unit 352 has the relay arithmetic function of the protection relay 400 and the function of the voltage information acquisition unit 12f in the first embodiment.
Therefore, unlike FIG. 2 described above, the master station 5 of the accident point location system is not provided with the accident detection means 11f and the voltage information acquisition means 12f.
The voltage information capturing means 351 is indicated as A / D in the corresponding block in FIG.

次に動作について説明する。   Next, the operation will be described.

図２０において、事故検出手段３５３は、例えば従来から用いられている不足電圧検出装置と同様のもので、ＰＴ８ｆ’’に接続され端子３の電圧をＡ／Ｄ変換機能を含む電圧情報取込手段３５１で取り込み、演算処理装置３５２で処理された電圧情報を監視するとともに事故発生時には、事故発生を検出する。この事故検出手段３５３による事故検出の情報を
矢印２１ｆ’’で示すように、演算処理装置３５２へ送信し事故発生時の電圧情報を取得し矢印３２１で示すように親局５に送信することで、親局５は、前述の実施の形態１の場合と同様な動作を行うことが出来、前述の実施の形態１と同様な効果が得られる。 In FIG. 20, an accident detection means 353 is similar to, for example, a conventional undervoltage detection device, and is connected to PT8f ″ and voltage information fetching means including an A / D conversion function for the voltage at the terminal 3 is used. The voltage information acquired by 351 and processed by the arithmetic processing unit 352 is monitored, and when an accident occurs, the occurrence of the accident is detected. As shown by the arrow 21f ″, the information of the accident detection by the accident detection means 353 is transmitted to the arithmetic processing unit 352, the voltage information at the time of the occurrence of the accident is acquired, and transmitted to the master station 5 as indicated by the arrow 321. The master station 5 can perform the same operation as in the first embodiment, and the same effect as in the first embodiment can be obtained.

実施の形態１３．
以下、この発明の実施の形態１３を、親局と保護リレーとを機能的に関連付けた更に他の事例を示す図２１により説明する。 Embodiment 13 FIG.
A thirteenth embodiment of the present invention will be described below with reference to FIG. 21 showing still another example in which a master station and a protection relay are functionally associated.

前述の実施の形態１においては事故点標定部７を事故点標定システム専用の事故点標定部７として設けた場合を例示したが、事故点標定システム専用の事故点標定部７を設ける代わりに配電用変電所内に設けられている保護リレーの演算処理部を事故点標定システムの事故点標定部として用いても同様の効果が得られる。その事例が本実施の形態１３であり、図２１に示すように、図２に例示した親局５に加え、図２に例示した親局５に加え、ＡＤ変換機能を含む電圧情報取込手段３５１と、この電圧情報取込手段３５１で取り込んだ電圧情報を演算処理する演算処理装置３５２と、事故検出手段３５３とを具備した保護リレー４００を備えている。
前記演算処理装置３５２は、保護リレー４００のリレー演算機能と前述の実施の形態１における事故点標定部７の機能とを有している。
従って、前述の図２と異なり、事故点標定システムの親局５に付属する事故点標定部７は設けられていない。 In the first embodiment, the accident point locating unit 7 is provided as the accident point locating unit 7 dedicated to the accident point locating system. However, instead of providing the accident point locating unit 7 dedicated to the accident point locating system, power distribution is possible. The same effect can be obtained even if the arithmetic processing unit of the protection relay provided in the substation is used as the accident point locating unit of the accident point locating system. This example is the thirteenth embodiment. As shown in FIG. 21, in addition to the master station 5 illustrated in FIG. 2, in addition to the master station 5 illustrated in FIG. 351, an arithmetic processing unit 352 that performs arithmetic processing on the voltage information acquired by the voltage information acquisition unit 351, and a protection relay 400 including an accident detection unit 353.
The arithmetic processing unit 352 has the relay arithmetic function of the protection relay 400 and the function of the accident point locating unit 7 in the first embodiment.
Therefore, unlike the above-described FIG. 2, the accident location module 7 attached to the master station 5 of the accident location system is not provided.

次に動作について説明する。   Next, the operation will be described.

図２１において、事故検出手段３５３による事故発生情報に基づき各子局６ａ，６ｂ，６ｃ，６ｄ，６ｅ，・・・（図１参照）から収集される配電線４の各地点の電圧情報、親局５で収集される端子３の電圧情報が伝送手段１４を介して伝送するところまでは前述の実施の形態１と同様である。図２１に示す構成例では、破線４５４で示してあるように、伝送手段１４を介して事故時の電圧情報は、配電用変電所に設けられた保護リレー４００の演算処理部３５２へ伝送される。この演算処理部３５２において親局５および子局６ａ，６ｂ，６ｃ，６ｄ，６ｅ，・・・で取得された事故時の電圧情報を元に事故点の標定演算を行うことで前述の実施の形態１の場合と同じ効果が得られる。   21, the voltage information of each point of the distribution line 4 collected from each of the slave stations 6a, 6b, 6c, 6d, 6e,... (See FIG. 1) based on the accident occurrence information by the accident detection means 353, the parent The process up to the point where the voltage information of the terminal 3 collected at the station 5 is transmitted via the transmission means 14 is the same as in the first embodiment. In the configuration example shown in FIG. 21, as indicated by a broken line 454, voltage information at the time of the accident is transmitted to the arithmetic processing unit 352 of the protection relay 400 provided in the distribution substation via the transmission means 14. . In this calculation processing unit 352, the fault point is determined based on the voltage information at the time of the accident acquired at the master station 5 and the slave stations 6a, 6b, 6c, 6d, 6e,. The same effect as in the case of Form 1 can be obtained.

なお、前述の実施の形態１〜１３では事故点標定部７に各子局６ａ，６ｂ，６ｃ，６ｄ，６ｅ，・・・の位置情報、例えば変電所から子局までのまでの配電線に沿った距離情報を持たせておくことで、前述の事故点標定がより容易に実現可能となる。   In the above-described first to thirteenth embodiments, the accident point locating unit 7 is provided with position information of each slave station 6a, 6b, 6c, 6d, 6e,..., For example, a distribution line from the substation to the slave station. By having distance information along, the above-mentioned accident location can be realized more easily.

なお、前述の実施の形態では各子局の電圧情報を収集する通信方式の事例としてＦＤ（Ｆｒｅｑｕｅｎｃｙ Ｄｉｖｉｓｉｏｎ）方式の場合を例示したが、ＴＤ（Ｔｉｍｅ Ｄｉｖｉｓｉｏｎ）方式やポーリング方式などの他の通信方式を使用してもよい。ただ、電圧情報を配電線を介して伝送するＰＬＣ（Ｐｏｗｅｒ Ｌｉｎｅ Ｃｏｍｍｕｎｉｃａｔｉｏｎ）方式の場合は、事故時に配電線の遮断器が開き配電線が電力系統から切り離された場合はその後は切り離された配電線を介しては電圧情報を伝送できなくなるため、原理的に伝送時間が少なくて済むＦＤ方式の方が好ましい。ＰＬＣではなく専用の通信ネットワークを使用する場合は、何れの通信方式であってもよい。   In the above-described embodiment, the case of the FD (Frequency Division) method is illustrated as an example of the communication method for collecting voltage information of each slave station. However, other communication methods such as a TD (Time Division) method and a polling method are used. May be used. However, in the case of PLC (Power Line Communication) that transmits voltage information through the distribution line, if the distribution line breaker opens and the distribution line is disconnected from the power system in the event of an accident, then the disconnected distribution line Since the voltage information cannot be transmitted through the FD method, the FD method, which requires less transmission time in principle, is preferable. When a dedicated communication network is used instead of the PLC, any communication method may be used.

前述の図１〜２１及びそれらの説明により実質的に例示されているように、前述の図１〜２１の技術は従来技術に比べ、以下の１〜２０の技術的特異点がある。   As substantially exemplified by the above-described FIGS. 1 to 21 and the description thereof, the technique of FIGS. 1 to 21 has the following technical singularities of 1 to 20 as compared with the prior art.

技術的特異点１
配電線の各地点に対応して設けられ対応地点の配電線の事故時の電圧情報を得る複数
の子局、これら子局から前記配電線の各地点の電圧情報を収集する親局、および前記
親局が収集した前記配電線の各地点の電圧情報のうち事故点にむかって減少する関係
にある複数の電圧を見出しそれら電圧から事故点を標定する事故点標定部を備えた事故点標定システムで
ある。 Technical singularity 1
A plurality of slave stations that are provided corresponding to each point of the distribution line and obtain voltage information at the time of the distribution line at the corresponding point, a master station that collects voltage information at each point of the distribution line from these slave stations, and Accident point locating system equipped with an accident point locating unit that finds a plurality of voltages that have a decreasing relationship toward the accident point from the voltage information of each point of the distribution line collected by the master station, and locates the accident point from these voltages It is.

技術的特異点２
技術的特異点１の事故点標定システムにおいて、事故点標定システムの機能の少なく
とも一部が配電線保護リレーに持たせてあることを特徴とする事故点標定システムで
ある。 Technical singularity 2
In the accident point locating system of technical singularity 1, the accident point locating system is characterized in that at least part of the function of the accident point locating system is provided to the distribution line protection relay.

技術的特異点３
技術的特異点１および技術的特異点２の何れか一の事故点標定システムにおいて、前
記親局が複数設けられ、これら各親局が収集した前記配電線の各地点の電圧情報のう
ち事故点にむかって減少する関係にある複数の電圧を見出しそれら電圧から事故点を
標定することを特徴とする事故点標定システムである。 Technical singularity 3
In the fault location system of either technical singularity 1 or technical singularity 2, there are a plurality of the above master stations, and the voltage information of each point of the distribution line collected by each of these master stations. It is an accident point locating system characterized by finding a plurality of voltages that have a decreasing relationship toward the accident point and locating the accident point from those voltages.

技術的特異点４
技術的特異点１および技術的特異点２の何れか一の事故点標定システムにおいて、電
圧が減少する方向に見て事故点より下流側の子局の電圧情報により補正して事故点を
標定することを特徴とする事故点標定システムである。 Technical singularity 4
In the fault location system of either technical singularity 1 or technical singularity 2, the accident point is determined by correcting it with the voltage information of the slave station downstream from the accident point when the voltage decreases. It is an accident location system characterized by

技術的特異点５
技術的特異点１および技術的特異点２の何れか一の事故点標定システムにおいて、前
記電圧情報は電流零点で計測した電圧情報であることを特徴とする事故点標定システ
ムである。 Technical singularity 5
In the accident point locating system according to any one of the technical singularity 1 and the technical singularity 2, the voltage information is voltage information measured at a current zero point.

技術的特異点６
技術的特異点１および技術的特異点２の何れか一の事故点標定システムにおいて、事
故時の最初の測定による前記配電線の各地点の電圧情報による事故点標定と、前記最
初の測定時点より所定時間後に測定した各地点の電圧情報による事故点標定とを行う
ことを特徴とする事故点標定システムである。 Technical singularity 6
In the fault location system of either technical singularity 1 or technical singularity 2, the fault location by the voltage information at each point of the distribution line by the first measurement at the time of the accident and the first measurement This is an accident location system that performs accident location using voltage information at each location measured after a predetermined time.

技術的特異点７
技術的特異点１および技術的特異点２の何れか一の事故点標定システムにおいて、配
電線における事故点の一方の側の配電線各地の電圧から事故点標定を行うと共に、配
電線における事故点の他方の側の配電線各地の電圧からも事故点を標定することを特
徴とする事故点標定システムである。 Technical singularity 7
In the fault location system of either technical singularity 1 or technical singularity 2, the fault location is determined from the voltage on each side of the distribution line on the one side of the distribution line and the accident point on the distribution line. This is an accident point locating system characterized by locating the accident point from the voltage on the other side of the distribution line.

技術的特異点８
技術的特異点１および技術的特異点２の何れか一の事故点標定システムにおいて、事
故により電圧情報が欠損した子局の位置により補正して事故点を標定することを特徴
とする事故点標定システムである。 Technical singularity 8
Accident point characterized in that in the accident point locating system of either technical singularity 1 or technical singularity 2, the accident point is determined by correcting the position of the slave station where voltage information is lost due to an accident. It is an orientation system.

技術的特異点９
技術的特異点１および技術的特異点２の何れか一の事故点標定システムにおいて、前
記親局で収集される前記各子局の電圧情報の各搬送周波数を何れも異なる周波数とす
ることを特徴とする事故点標定システムである。 Technical singularity 9
In the accident location system of any one of technical singularity 1 and technical singularity 2, each carrier frequency of the voltage information of each slave station collected by the master station should be a different frequency. Is an accident location system.

技術的特異点10
配電線の各地点に設置され設置地点における配電線の事故時の電圧情報を得る複数の
子局と、これら子局から前記配電線の各地点の同時刻での電圧情報を収集し設置地点
における配電線の事故時の電圧情報を得る親局と、前記親局が収集した前記配電線の
各地点の電圧情報を用いて事故点を標定する事故点標定部とを備えた事故点標定シス
テムである。 Technical singularity 10
Multiple slave stations that are installed at each point of the distribution line and obtain voltage information at the time of the distribution line accident at the installation point, and collect voltage information at the same time at each point of the distribution line from these slave stations, and at the installation point An accident point locating system comprising a master station that obtains voltage information at the time of an accident on a distribution line and an accident point locating unit that locates an accident point using the voltage information of each point of the distribution line collected by the parent station It is.

技術的特異点11
技術的特異点10の事故点標定システムにおいて、前記事故点標定部が、最も低い電圧
情報の地点から配電用変電所に向かう経路上にある配電線の地点の電圧情報からこの
経路上にある配電線の各地点の電圧を求める式を導出し、この式を用いて事故点を標
定することを特徴とする事故点標定システムである。 Technical singularity 11
In the accident point locating system of technical singularity 10, the accident point locating unit is assigned to the distribution information on the route from the voltage information of the distribution line on the route from the lowest voltage information point to the distribution substation. This is an accident point locating system characterized by deriving an equation for determining the voltage at each point of the wire and using this equation to locate the accident point.

技術的特異点12
技術的特異点10および技術的特異点11の何れか一の事故点標定システムにおいて、前
記親局が複数設けられ、前記事故点標定部が複数の前記親局で共有されることを特徴
とする事故点標定システムである。 Technical singularity 12
In the accident point locating system according to any one of the technical singularity 10 and the technical singularity 11, a plurality of the master stations are provided, and the accident point locating unit is shared by the plurality of master stations. It is an accident location system.

技術的特異点13
技術的特異点11の事故点標定システムにおいて、前記事故点標定部が、最も低い電圧情報がほぼ零でない場合に、最も低い電圧情報の前記子局の設置地点を用いて補正して事故点を標定することを特徴とする事故点標定システムである。 Technical singularity 13
In the accident point locating system of technical singularity 11, the accident point locator corrects the accident point by using the location of the slave station with the lowest voltage information when the lowest voltage information is not nearly zero. It is an accident location system characterized by locating.

技術的特異点14
技術的特異点10および技術的特異点11の何れか一の事故点標定システムにおいて、前記子局及び親局が、配電線を流れる電流が零かどうかを検出する零点検出手段を有し、前記零点検出手段が零電流を検出した時点の電圧情報を取得することを特徴とする事故点標定システムである。 Technical singularity 14
In the accident location system of any one of the technical singularity 10 and the technical singularity 11, the slave station and the master station have zero point detection means for detecting whether or not the current flowing through the distribution line is zero, An accident point locating system characterized in that voltage information at the time when a zero point detecting means detects zero current is acquired.

技術的特異点15
技術的特異点10ないし技術的特異点14の何れか一の事故点標定システムにおいて、事故時の複数時点での電圧情報を取得して、複数時点での電圧情報を用いて事故点を標定することを特徴とする事故点標定システムである。 Technical singularity 15
In the accident point locating system of any one of technical singularity 10 to technical singularity 14, acquire voltage information at multiple points in time of the accident, and pinpoint the accident point using the voltage information at multiple points in time This is an accident location system.

技術的特異点16
技術的特異点11の事故点標定システムにおいて、前記事故点標定部が、最も低い電圧情報の地点よりも配電用変電所から遠い地点により高い電圧情報がある場合には、最も低い電圧情報の地点から配電用変電所とは反対側にあるより高い電圧情報がある地点への経路上にある配電線お各地点での電圧を求める式を導出し、この式も用いて事故点を標定することを特徴とする事故点標定システムである。 Technical singularity 16
In the fault location system of technical singularity 11, if the fault location unit has higher voltage information at a point farther from the distribution substation than the lowest voltage information point, the lowest voltage information point Deriving formulas to find the voltage at each point on the distribution line on the route to the point with higher voltage information on the opposite side of the distribution substation, and using this formula also to locate the accident point Is an accident location system.

技術的特異点17
技術的特異点10ないし技術的特異点16の何れか一の事故点標定システムにおいて、情報欠損である前記子局が存在し、標定された事故点の位置が情報欠損である前記子局の設置地点よりも遠い場合は、情報欠損である前記子局の設置地点を事故点とすることを特徴とする事故点標定システムである。 Technical singularity 17
In the accident location system of any one of the technical singularity 10 to the technical singularity 16, there is the slave station that is information-deficient, and the location of the faulty location that is standardized is the installation of the slave station that is information-deficient In the case of an accident point locating system, when the location is farther than a point, the location where the slave station where information is missing is set as an accident point.

技術的特異点18
技術的特異点10ないし技術的特異点17の何れか一の事故点標定システムにおいて、前記子局と前記親局との間の通信を配電線を介して行うことを特徴とする事故点標定システムである。 Technical singularity 18
Accident point locating system according to any one of technical singularity 10 to technical singularity 17, characterized in that communication between the slave station and the master station is performed via a distribution line. It is.

技術的特異点19
技術的特異点18の事故点標定システムにおいて、前記子局が通信に使用する搬送波の周波数を前記子局ごとに異なる周波数とすることを特徴とする事故点標定システムである。 Technical singularity 19
In the accident point locating system of the technical singular point 18, the accident point locating system is characterized in that the frequency of the carrier used by the slave station for communication is different for each slave station.

技術的特異点20
技術的特異点18の事故点標定システムにおいて、前記子局が通信に使用する搬送波の周波数を親局から遠い前記子局ほど小さくすることを特徴とする事故点標定システムである。 Technical singularity 20
In the accident point locating system at the technical singular point 18, the accident point locating system is characterized in that the frequency of the carrier used by the slave station for communication is made smaller as the slave station is farther from the master station.

なお、図１〜図２１において、同一または相当部分には同一符号を付してある。   1 to 21, the same or corresponding parts are denoted by the same reference numerals.

この発明の実施の形態１を示す図で、配電系統の一例および事故点標定のシステム構成の一例を示す図である。It is a figure which shows Embodiment 1 of this invention, and is a figure which shows an example of a system configuration | structure of an example of a power distribution system, and an accident point location. この発明の実施の形態１を示す図で、図１における親局の構成の一例を示す図である。It is a figure which shows Embodiment 1 of this invention, and is a figure which shows an example of a structure of the master station in FIG. この発明の実施の形態１を示す図で、図１における子局の構成の一例を示す図である。It is a figure which shows Embodiment 1 of this invention, and is a figure which shows an example of a structure of the sub_station | mobile_unit in FIG. この発明の実施の形態２を示す図で、配電線における事故点標定システムの他の事例を示す図図である。It is a figure which shows Embodiment 2 of this invention, and is a figure which shows the other example of the accident point location system in a distribution line. この発明の実施の形態３を示す図で、事故点標定システムの動作概念の一例を説明する図である。It is a figure which shows Embodiment 3 of this invention, and is a figure explaining an example of the operation | movement concept of an accident point location system. この発明の実施の形態３を示す図で、事故点に残留電圧が生じる場合の事故点標定システムの動作の概念を説明する図である。It is a figure which shows Embodiment 3 of this invention, and is a figure explaining the concept of operation | movement of the accident point location system in case a residual voltage arises in an accident point. この発明の実施の形態４を示す図で、親局の他の構成例を示す図である。It is a figure which shows Embodiment 4 of this invention, and is a figure which shows the other structural example of a master station. この発明の実施の形態４を示す図で、子局の他の構成例を示す図である。It is a figure which shows Embodiment 4 of this invention, and is a figure which shows the other structural example of a slave station. この発明の実施の形態４を示す図で、事故時の電圧・電流の波形の例を示す図である。It is a figure which shows Embodiment 4 of this invention, and is a figure which shows the example of the waveform of the voltage and electric current at the time of an accident. この発明の実施の形態４を示す図で、事故点標定システムの動作概念の他の例を説明する図である。It is a figure which shows Embodiment 4 of this invention, and is a figure explaining the other example of the operation | movement concept of an accident point location system. この発明の実施の形態５を示す図で、事故点標定システムの動作概念の更に他の例を説明する図である。It is a figure which shows Embodiment 5 of this invention, and is a figure explaining the further another example of the operation | movement concept of an accident point location system. この発明の実施の形態６を示す図で、配電系統の他の例および事故点標定のシステム構成の他の例を示す図である。It is a figure which shows Embodiment 6 of this invention, and is a figure which shows the other example of the system configuration | structure of another example of a power distribution system, and an accident point location. この発明の実施の形態６を示す図で、図１２における事故点標定システムの動作概念の一例を説明する図である。It is a figure which shows Embodiment 6 of this invention, and is a figure explaining an example of the operation | movement concept of the accident point location system in FIG. この発明の実施の形態７を示す図で、事故点標定システムの動作概念の更に他の例を説明する図である。It is a figure which shows Embodiment 7 of this invention, and is a figure explaining the further another example of the operation | movement concept of an accident point location system. この発明の実施の形態８を示す図で、配電系統の一例および事故点標定のシステム構成の一例と事故点標定情報の搬送波との関係の一例を示す図である。It is a figure which shows Embodiment 8 of this invention, and is a figure which shows an example of the relationship between an example of a power distribution system, an example of the system configuration | structure of accident point location, and the carrier wave of accident point location information. この発明の実施の形態８を示す図で、図１５における親局の構成の一例を示す図である。It is a figure which shows Embodiment 8 of this invention, and is a figure which shows an example of a structure of the main | base station in FIG. この発明の実施の形態８を示す図で、図１５における子局の構成の一例を示す図である。It is a figure which shows Embodiment 8 of this invention, and is a figure which shows an example of a structure of the sub_station | mobile_unit in FIG. この発明の実施の形態１０を示す図で、親局と保護リレーとを機能的に関連付けた事例を示す図である。It is a figure which shows Embodiment 10 of this invention, and is a figure which shows the example which linked | related the master station and the protection relay functionally. この発明の実施の形態１１を示す図で、親局と保護リレーとを機能的に関連付けた他の事例を示す図である。It is a figure which shows Embodiment 11 of this invention, and is a figure which shows the other example which functionally linked the master station and the protection relay. この発明の実施の形態１２を示す図で、親局と保護リレーとを機能的に関連付けた更に他の事例を示す図である。It is a figure which shows Embodiment 12 of this invention, and is a figure which shows the further another example which linked | related the master station and the protection relay functionally. この発明の実施の形態１３を示す図で、親局と保護リレーとを機能的に関連付けた更に他の事例を示す図である。It is a figure which shows Embodiment 13 of this invention, and is a figure which shows the further another example which linked | related the master station and the protection relay functionally. 従来の方式を示す構成図である。It is a block diagram which shows the conventional system.

符号の説明Explanation of symbols

３ 端子、 ４ 配電線、
５ 親局、 ６ 子局、
７ 事故点標定部、 ８ ＰＴ（電圧計測手段）、
９ 信号結合器、 １１ 事故検出手段、
１２ 電圧情報取得手段、 １３ 電力線搬送通信手段、
１５ ＣＴ、 １６ 零点検出手段、
１７ フィルタ手段、 ２１ 事故検出信号、
２２ 零点検出信号、 Ｆ 配電線上の事故点、
３００，４００ 保護リレー。 3 terminals, 4 distribution lines,
5 master stations, 6 slave stations,
7 accident location part, 8 PT (voltage measuring means),
9 signal coupler, 11 accident detection means,
12 voltage information acquisition means, 13 power line carrier communication means,
15 CT, 16 Zero point detection means,
17 Filter means, 21 Accident detection signal,
22 Zero point detection signal, F Accident point on distribution line,
300,400 Protection relay.

Claims (9)

配電線の各地点に対応して設けられ各地点の電圧を計測し配電線電圧の情報を出力する電圧計測手段、
前記配電線の各地点に対応して設けられ、事故発生時に事故発生情報を送信する事故検出手段からの事故発生情報に基づき事故時の前記電圧計測手段の出力である配電線電圧の情報を取得する複数の子局、
これら子局から前記配電線の各地点の前記配電線電圧情報を収集する親局、および
前記親局が前記各子局から収集した前記配電線の各地点の前記配電線電圧情報のうち事故点にむかって減少する関係にある複数の商用周波電圧から事故点を標定する事故点標定部を備えた事故点標定システム。 Voltage measuring means provided corresponding to each point of the distribution line and measuring the voltage at each point and outputting information on the distribution line voltage,
Acquires information on the distribution line voltage that is the output of the voltage measurement means at the time of the accident based on the accident occurrence information from the accident detection means that is provided corresponding to each point of the distribution line and transmits the accident occurrence information at the time of occurrence of the accident Multiple slave stations,
A master station that collects the distribution line voltage information at each point of the distribution line from these slave stations, and an accident point in the distribution line voltage information at each point of the distribution line that the master station collects from each of the slave stations An accident point locating system equipped with an accident point locating unit that locates an accident point from a plurality of commercial frequency voltages that have a decreasing relationship. 請求項１に記載の事故点標定システムにおいて、
前記親局が母線に対応して設けられ、事故発生時に事故発生情報を送信する事故検出手段からの事故発生情報に基づき事故時の前記母線電圧の情報を取得し、
事故点標定部は前記母線電圧および前記配電線電圧情報のうち事故点にむかって減少する関係にある複数の電圧実効値または電流零点における電圧瞬時値から事故点を標定する
ことを特徴とする事故点標定システム。 In the accident location system according to claim 1,
The master station is provided corresponding to the bus, and acquires the bus voltage information at the time of the accident based on the accident occurrence information from the accident detection means that transmits the accident occurrence information at the time of the accident,
An accident point locating unit locates an accident point from a plurality of effective voltage values or instantaneous voltage values at a current zero point that are reduced toward the accident point among the bus voltage and the distribution line voltage information. Pointing system. 請求項２に記載の事故点標定システムにおいて、
前記子局は、前記事故検出手段からの事故発生情報及び前記配電線電圧の情報を取得する電圧情報取得手段を備え、前記事故検出手段及び電圧情報取得手段が共通の電圧計測手段からの出力配電線電圧を入力し、
前記親局は、前記事故検出手段からの事故発生情報及び前記母線電圧の情報を取得する電圧情報取得手段を備え、前記事故検出手段及び電圧情報取得手段が共通の電圧計測手段からの出力母線電圧を入力する
ことを特徴とする事故点標定システム。 In the accident location system according to claim 2,
The slave station includes an accident occurrence information from the accident detection means and voltage information acquisition means for acquiring information on the distribution line voltage, and the accident detection means and the voltage information acquisition means are connected to an output distribution from a common voltage measurement means. Enter the wire voltage,
The master station includes an accident occurrence information from the accident detection means and voltage information acquisition means for acquiring the bus voltage information, and the accident detection means and the voltage information acquisition means are output bus voltages from a common voltage measurement means. Accident point locating system characterized by inputting. 請求項１〜請求項３の何れか一に記載の事故点標定システムにおいて、
前記親局が複数設けられ、これら各親局が収集した前記配電線の各地点の電圧情報のうち事故点にむかって減少する関係にある複数の前記電圧から事故点を標定する
ことを特徴とする事故点標定システム。 In the accident point location system according to any one of claims 1 to 3 ,
A plurality of the master stations are provided, and the fault point is determined from a plurality of the voltages that are reduced toward the fault point among the voltage information of each point of the distribution line collected by each of the master stations. Accident location system. 請求項１〜請求項３の何れか一に記載の事故点標定システムにおいて、
電圧が減少する方向に見て事故点より下流側の子局の電圧情報により補正して事故点を標定する
ことを特徴とする事故点標定システム。 In the accident point location system according to any one of claims 1 to 3 ,
An accident point locating system characterized in that the point of an accident is determined by correcting with the voltage information of a slave station downstream from the point of the accident as seen in the direction in which the voltage decreases. 請求項１〜請求項３の何れか一に記載の事故点標定システムにおいて、
事故時の最初の測定による前記配電線の各地点の前記電圧による事故点標定と、前記最初の測定時点より所定時間後に測定した各地点の前記電圧による事故点標定とを行う
ことを特徴とする事故点標定システム。 In the accident point location system according to any one of claims 1 to 3 ,
A fault point locating by the first of the voltage of each point of the distribution line by measuring the time of the accident, and performs the fault point locating by the first of the voltage of each point measured after a predetermined time from the measurement time Accident location system. 請求項１〜請求項３の何れか一に記載の事故点標定システムにおいて、
配電線における事故点の一方の側の配電線各地の前記電圧から事故点標定を行うと共に、
配電線における事故点の他方の側の配電線各地の前記電圧からも事故点を標定する
ことを特徴とする事故点標定システム。 In the accident point location system according to any one of claims 1 to 3 ,
It performs fault point locating from the voltage of the distribution line all over one side of the fault point in the power distribution line,
An accident point locating system characterized by locating an accident point from the above-mentioned voltages at various points on the other side of the distribution line. 請求項１〜請求項３の何れか一に記載の事故点標定システムにおいて、
事故により電圧情報が欠損した子局の位置により補正して事故点を標定する
ことを特徴とする事故点標定システム。 In the accident point location system according to any one of claims 1 to 3 ,
An accident point locating system characterized by locating an accident point by correcting it according to the position of a slave station whose voltage information is lost due to an accident. 請求項１〜請求項３の何れか一に記載の事故点標定システムにおいて、
前記親局で収集される前記各子局の電圧情報の各搬送周波数を何れも異なる周波数とすることを特徴とする事故点標定システム。 In the accident point location system according to any one of claims 1 to 3 ,
An accident point locating system, wherein each carrier frequency of the voltage information of each slave station collected by the master station has a different frequency.
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