JP2005185028A - Monitoring system of low-voltage power distribution system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To monitor the system state of a low-voltage power distribution system, related to a monitoring system of the low-voltage power distribution system that monitors the low-voltage power distribution system, connected to a low-voltage consumer. <P>SOLUTION: A home server 22 connected to the Internet 3 and an electricity amount measuring device 21 that measures an electricity amount in a house are installed in side home of the low-voltage consumer 2, the home server 22 receives the measurement result from the electricity amount measuring device 21, and transmits the data to a low-voltage system monitor 1 via the Internet 3, as they are, or by processing them. The low-voltage system monitor 1 monitors the low-voltage customer 2 from the voltage value or the current value received from the low-voltage customer 2 and the state of a low-voltage power distribution line 4 connected to the low-voltage customer. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a low-voltage distribution system monitoring system that monitors a low-voltage distribution system to which low-voltage consumers are connected.

  In general, power is supplied from a high-voltage distribution line via a pole transformer to a low-voltage distribution system to which low-voltage consumers are connected. The high-voltage distribution system is remotely monitored and controlled by the distribution automation system, but the low-voltage distribution system is not remotely monitored and controlled, and is periodically inspected manually. From this, for example, when a power outage occurs, the power outage area is grasped by telephone contact from a low-voltage customer, and measures to recover from the power outage are taken.

Receiving a call from a low-voltage customer, searching for a power outage area based on the telephone number, grasping the state of the low-voltage distribution system laid in that area, and promptly responding appropriately to the low-voltage customer There are some (see, for example, Patent Document 1).
JP-A-9-182317 (FIG. 1)

  However, in the system of Patent Document 1, since a power failure state due to a grid fault occurring in a low voltage distribution system is searched for a power failure area only after receiving a call from a low voltage customer, the power failure is grasped before receiving a call. Can not do it.

  In addition, since the distribution automation system monitors the high-voltage distribution system, it can detect a power failure in the low-voltage distribution system due to a power failure that occurred in the high-voltage distribution system. When only a power failure occurs, the distribution automation system cannot grasp the state of the low-voltage distribution system.

  In addition, when receiving a call from a low-voltage customer, it is impossible to grasp whether the blackout of the low-voltage customer is due to an accident in the low-voltage distribution system or an accident caused by the home of the low-voltage customer.

  An object of the present invention is to monitor the amount of electricity of each low-voltage consumer of a low-voltage distribution system, and monitor the low-voltage distribution system capable of appropriately monitoring not only the low-demand consumer but also the state of the low-voltage distribution system to which the low-voltage consumer is connected. Is to provide a system.

  The low-voltage distribution system monitoring system according to the present invention measures the voltage in the home with an electric quantity measuring device arranged in the home of each low-voltage consumer connected to the low-voltage distribution system, and identifies each low-voltage consumer. A low-voltage customer identification number is assigned to a voltage value or a current value measured by an electric quantity measuring device and transmitted to a low-voltage system monitoring device via a public communication line from a home server in which a low-voltage customer identification number is stored in advance To do. The low-voltage system monitoring device receives the low-voltage customer identification number and voltage value transmitted from the home server of each low-voltage customer to the public communication line, and uses the received low-voltage customer identification number and voltage value to generate the low-voltage distribution system. Monitor.

  According to the present invention, an electrical quantity measuring device and a home server are installed in the homes of one or more low-voltage consumers connected to a low-voltage distribution system, and the voltage value of each low-voltage consumer measured by the electrical quantity measuring device. Is sent to the low-voltage system monitoring device, and the low-voltage system monitoring device monitors the status of the low-voltage distribution system to which the low-voltage customer is connected based on the voltage value of the low-voltage customer. I can grasp. Also, based on the information of a plurality of low-voltage customers, for example, whether a power outage that occurred in a certain low-voltage customer occurred in the low-voltage distribution system to which the low-voltage customer belongs, or occurred in the home of the low-voltage customer It can also be determined.

  FIG. 1 is a configuration diagram of a low-voltage distribution system monitoring system according to an embodiment of the present invention. The high-voltage distribution line 6 supplies power from the substation to the low-voltage distribution line 4 via the switch 7 and the transformer 5. The low-voltage distribution line 4 is connected from the high-voltage distribution line 6 through the switch 7 and the transformer 5, converted into a specified supply voltage by the transformer 5, and supplies power to the plurality of low-voltage consumers 2. The low-voltage customer 2 draws the low-voltage distribution line 4 and receives electric power through the distribution board 8 into the house. The distribution board 8 includes a current limiter (limiter).

  In the house of the low-voltage consumer 2, the electricity quantity measuring device 21 for measuring the amount of electricity such as the voltage and current of the electric power supplied to the house, and the electricity quantity measured by the electricity quantity measuring device 21 are processed to the Internet. A home server 22 for transmitting to the low-voltage system monitoring device 1 via the network 3 and a home display terminal 23 for displaying and outputting the contents processed by the home server 22 as necessary are installed. Each of these devices includes a transmitting / receiving device capable of transmitting / receiving data between the devices. This transmission / reception apparatus may be either wired or wireless connection. However, in FIG. 1, for convenience of installation work and terminal movement, an example using wireless communication that allows mutual communication in the home is used. Show.

  The electrical quantity measuring device 21 is connected to the distribution board 8 in the house, measures a voltage value and a current value, and transmits the measured value to the home server 22 by wireless communication. The electric quantity receiving unit 24 of the home server 22 receives the measurement value from the electric quantity measuring device 21 and the state determining unit 25 performs state determination processing. For example, determination of a power failure of a consumer, determination of a power failure of a high-voltage distribution line, determination of eligibility of a customer's voltage, and the like are performed. Further, the low-voltage customer identification number stored in the low-voltage customer identification number storage unit 26 is taken out, and the voltage value and current value of the low-voltage customer measured by the electric quantity measuring device are transmitted to the public communication line by the home state transmission unit 27. To the low-voltage system monitoring device 1 via the Internet network 3.

  In addition, although illustration is abbreviate | omitted, the home server 22 is equipped with the battery for enabling data transmission to the low voltage | pressure system monitoring apparatus 1 at the time of a power failure. Thus, the home server 22 can communicate even during a power failure. Further, the connection between the home server 22 and the low-voltage system monitoring device 1 may be a continuous connection or a dial-up connection of the Internet network 3, but a continuous connection environment is preferable in consideration of real-time monitoring.

  As will be described later, the in-home display terminal 23 displays a message to the low-voltage customer 2 at the time of a power failure due to an accident of the high-voltage distribution line 6 or a restoration procedure in the case where only the home of the home server 22 is out of power. It is a terminal for displaying guidance such as. As long as the home display terminal 23 is a terminal having means for communicating with the home server 22, the type of display terminal such as a personal computer or a PDA is not limited.

  FIG. 2 is a configuration diagram of the low-voltage system monitoring device in the low-voltage distribution system monitoring system according to the embodiment of the present invention. Data transmitted from home servers 22 installed in a plurality of low-voltage customers 2 via the Internet network 3 is received by the response receiving unit 10 of the low-voltage system monitoring device 1, and the received data is the low-voltage customer information matching unit. 11 is input. The low-voltage customer information matching unit 11 stores the received measurement value of the amount of electricity in the measurement value database 16 together with the low-voltage customer identification number.

  The low-voltage customer database 14 stores a low-voltage customer identification number, a name and address of the low-voltage customer, a supply transformer identification number, and a distance from the supply transformer to the customer. Further, the transformer database 15 stores the address where the supply transformer connected to the low voltage consumer is installed. Further, the map database 17 stores map data of the low voltage distribution system including the customer and the vicinity of the supply substation.

  The low-voltage customer information collating unit 11 is based on the low-voltage customer identification number received from the home server 22 of the plurality of low-voltage customers 2, the supply transformer identification number belonging to the low-voltage customer identification number, the name of the low-voltage customer, Necessary data such as the address and the distance from the supply transformer is taken out from the low voltage customer database 14, and the address of the supply transformer is taken out from the transformer database 15.

  And the low voltage | pressure system state determination part 12 lists all the low voltage | pressure customers who have a power failure from each data taken out by the low voltage | pressure customer information collation part 11, and the blackout customer data output part 13 of the said blackout customer's Map data centered on the address and geographic data centered on the address of the supply transformer are extracted from the map database 17, and a list of blackout customers, a map centered on the address of the blackout customer, and the supply transformer The display unit 18 displays a map centering on the installation location. The display unit 18 may be any display device that can display the display items. For example, a dedicated terminal such as a CRT, a browser Web access from a personal computer, or a portable terminal such as a PDA can be used. The type is not limited.

  FIG. 3 is an explanatory diagram of the low-pressure customer database 14. The low-voltage consumer database 14 stores the name and address of the low-voltage consumer from the low-voltage consumer identification number, the identification number of the supply transformer that supplies power to the low-voltage consumer, and the distance from the supply transformer to the consumer. Database. That is, as long as the low-voltage customer identification number transmitted from the home server 22 can be grasped when a power outage occurs in the house, the low-voltage customer information collating unit 11 can search and collate the low-voltage customer from the low-voltage customer database 14. Therefore, it is possible to instantly grasp the address of the low-voltage customer where the power failure has occurred. Therefore, it is possible to shorten the time required for recovery from power failure.

  FIG. 4 is an explanatory diagram of the transformer database 15. The transformer database 15 is a database that stores the address where the supply transformer is installed in association with the transformer identification number. By searching and collating the low voltage consumer identification number transmitted from the home server 22 with this transformer database 15, it is possible to instantly grasp the address of the supply transformer to the low voltage consumer where a power failure has occurred. Therefore, it is possible to reduce the time required for power failure recovery even when a home power failure occurs.

  FIG. 5 is an explanatory diagram of the measurement value database 16. The measurement value database 16 is a database that stores the electric quantity measurement value transmitted from the home server 22 in association with the low-pressure customer identification number. At the time of reception from the home server 22, the voltage value or current value, which is an electric quantity, is stored in the measurement value database 16, and the measurement value is read from the low-voltage system state determination unit 12 to determine the system state in the house.

  FIG. 6 is a flowchart showing the processing contents of the home server 22 in Embodiment 1 of the present invention, and FIG. 7 is a flowchart showing the processing contents of the low-voltage system monitoring device 1 in Embodiment 1 of the present invention. In the first embodiment, the voltage value of the low voltage consumer is transmitted from the home server 22 provided in each low voltage consumer 2, and the state of the low voltage distribution system is determined based on the voltage value of the low voltage consumer in the low voltage system monitoring device 1. Are to be monitored.

  In the home server 22, as shown in FIG. 6, first, when the state determination unit 25 receives a voltage value from the electrical quantity measuring device 21 (S 11), the low-voltage customer identification stored in the low-voltage customer identification number storage unit 26. The number is taken out, and the low voltage customer identification number is added to the received voltage value and transmitted to the low voltage system monitoring apparatus 1 via the Internet network 3 by the in-home state transmission unit 27 (S12).

  As shown in FIG. 7, the low-voltage system monitoring apparatus 1 receives the voltage value and the low-voltage customer identification number from the home server 22 (S21), searches the low-voltage customer database 14 for the low-voltage customer identification number, A low-voltage consumer having a customer identification number is specified, a voltage value is stored in the measurement value database 16 (S22), and the system state of the low-voltage distribution system is determined from the voltage value received by the low-voltage system state determination unit 12 (S23). .

  According to the first embodiment, the voltage measured in the home of the low-voltage consumer 2 is transmitted from the home server 22 to the low-voltage system monitoring device 1 via the Internet network 3. Can be grasped, and the system state of the low-voltage distribution system can be monitored.

  FIG. 8 is a flowchart showing the processing contents of the home server 22 in Embodiment 2 of the present invention. In the second embodiment, in addition to the first embodiment, the home server 22 determines whether or not a power failure has occurred in the low-pressure consumer 2.

  In FIG. 8, when the home server 22 receives a voltage value from the electricity quantity measuring device 21 (S31), the home server 22 determines whether or not a power failure has occurred or has recovered from the received voltage value (S32). When it did, the flag and low voltage | pressure customer identification number showing a power failure or a return are transmitted to the low voltage | pressure system monitoring apparatus 1 (S33).

  Whether or not a power failure has occurred is determined by detecting that the voltage value measured by the electrical quantity measuring device 21 is 0 V or less than a predetermined low voltage. If it is determined that there is a power failure, a flag indicating no voltage is set, and a low-voltage consumer identification number is transmitted to the low-voltage system monitoring device 1 via the Internet 3 together with the information.

  In the low-voltage system monitoring device 1, the low-voltage customer identification number is compared with the low-voltage customer address, name, and transformer identification number supplied to the low-voltage customer. Each time it is sent, it immediately detects low-voltage customers who are out of power.

  According to the second embodiment, the home server 22 determines whether or not a power failure has occurred, and transmits it to the low-voltage system monitoring device 1. Therefore, the low-voltage system monitoring device 1 can immediately detect a low-voltage customer in which a power failure has occurred. it can.

  FIG. 9 is a flowchart showing the processing contents of the low-voltage system monitoring device 1 according to the third embodiment of the present invention. In the third embodiment, in addition to the second embodiment, a low-voltage consumer in which a power failure has occurred is displayed together with map information.

  In FIG. 9, the voltage value and the low-voltage customer identification number are received from the home server 22 (S41), the low-voltage customer identification number is searched from the low-voltage customer database 14 and the low-voltage customer with the low-voltage customer identification number is specified. Then, the voltage value is stored in the measured value database 16 (S42), and the system state of the low-voltage distribution system is determined from the voltage value received by the low-voltage system state determination unit 12 (S43). Then, the address of the low-voltage customer who has lost power is specified from the low-voltage customer database 14 based on the low-voltage customer identification number (S44), and the electronic map information is acquired from the map database 17 centering on the address of the low-voltage customer. 18 (S45).

  According to the third embodiment, since the electronic map is cut out and displayed in an arbitrary size specified in advance on the display unit 18 of the low-voltage system monitoring device 1 around the address of the low-voltage customer who has lost power, the low-voltage system monitoring device 1 It is possible to visually recognize the low-voltage customer who has a power failure on the side, together with the map information.

  FIG. 10 is a flowchart showing the processing contents of the low-voltage system monitoring device 1 according to the fourth embodiment of the present invention. In the fourth embodiment, in addition to the second embodiment, a transformer that supplies power to a low-voltage consumer in which a power failure has occurred is displayed together with map information.

  In FIG. 10, the voltage value and the low-voltage customer identification number are received from the home server 22 (S51), the low-voltage customer identification number is searched from the low-voltage customer database 14 and the low-voltage customer with the low-voltage customer identification number is specified. Then, the voltage value is stored in the measurement value database 16 (S52), and the system state of the low-voltage distribution system is determined from the voltage value received by the low-voltage system state determination unit 12 (S53). Then, based on the low voltage customer identification number, the identification number of the supply transformer supplying power to the low voltage consumer who has failed due to the power failure is specified from the low voltage customer database 14, and the supply transformer identification number is determined from the transformer database 16. Search and specify the address of the transformer (S54). Electronic map information is acquired from the map database 17 centering on the address of the transformer and displayed on the display unit 18.

  According to the fourth embodiment, the display unit 18 of the low-voltage system monitoring device 1 displays an electronic map with an arbitrary size designated in advance, centering on the installation location of the transformer. It is possible to display a transformer that supplies power to the low-voltage consumer 2 in which the power is generated together with the map information. Therefore, it is possible to quickly respond to the cause investigation of the power failure.

  FIG. 11 is a flowchart showing the processing contents of the low-voltage system monitoring device 1 according to the fifth embodiment of the present invention. In the fifth embodiment, in addition to the second embodiment, when the power failure information of the low voltage consumer is received, the distance from the position where the transformer supplying power to the low voltage consumer is installed to the low voltage consumer is determined. Collation is performed, and the power failure range of the low voltage distribution system to which power is supplied from the transformer is detected.

  In FIG. 11, the voltage value and the low-voltage customer identification number are received from the home server 22 (S61), the low-voltage customer identification number is searched from the low-voltage customer database 14 and the low-voltage customer with the low-voltage customer identification number is specified. Then, the voltage value is stored in the measurement value database 16 (S62), and the system state of the low-voltage distribution system is determined from the voltage value received by the low-voltage system state determination unit 12 (S63). Then, the supply transformer identification number is searched from the low voltage customer database 14 based on the low voltage customer identification number, the supply transformer supplying power to the low voltage customer who has failed is identified (S64), and the supply transformer identification Low voltage customers supplied from the same transformer as the number are searched from the low voltage customer database 14, and steps S66 to S69 are repeated for the number of search results (S65).

  That is, the low voltage consumer identification number of the low voltage consumer is searched from the measurement value database 16 to obtain a voltage value to determine whether or not there is a power failure (S66). The distance from the transformer is taken out (S67), and it is determined whether the distance to the supply transformer is the shortest among the low-voltage consumers connected to the same transformer (S68). The accident point is updated assuming that there is an accident point before or after the customer. An accident point is detected by repeating this for the low-voltage consumer connected to the same transformer (S69).

  The detection of the accident point is based on the distance to the transformer of the low-voltage customer where power failure has not occurred and the low-voltage customer where power failure occurs. The distance to the transformer is compared, and it is determined that there is a cause of the power outage before or after the low voltage consumer closest to the transformer.

  According to the fifth embodiment, a power outage area is detected using a power outage state or a charge state of a plurality of low voltage consumers connected to the transformer, and a position where the power outage is detected in the low voltage distribution system supplied from the transformer is detected. Can be detected properly.

  FIG. 12 is a flowchart showing the processing contents of the low-voltage system monitoring apparatus 1 in Embodiment 6 of the present invention. In the sixth embodiment, in addition to the second embodiment, when the power failure information of the low-voltage consumer is received, the low-voltage consumer of non-power failure (charging) connected to the transformer supplying power to the low-voltage consumer is searched. Then, check the distance from the location where the transformer is installed to the low-voltage consumer with no power outage (charging) and the distance to the low-voltage consumer with power outage. It is determined whether there is a power outage caused by the facility.

  In FIG. 12, the voltage value and the low voltage customer identification number are received from the home server 22 (S71), the low voltage customer identification number is searched from the low voltage customer database 14 and the low voltage customer with the low voltage customer identification number is specified. Then, the voltage value is stored in the measured value database 16 (S72), and the system state of the low-voltage distribution system is determined from the voltage value received by the low-voltage system state determination unit 12 (S73). Then, the supply transformer identification number is retrieved from the low voltage customer database 14 based on the low voltage customer identification number, the supply transformer supplying power to the low voltage customer who has failed is identified (S74), and the supply transformer identification is identified. Low voltage customers supplied from the same transformer as the number are searched from the low voltage customer database 14, and steps S76 to S79 are repeated for the number of search results (S75).

  That is, the low voltage consumer identification number of the low voltage consumer is searched from the measurement value database 16 to obtain a voltage value and determine whether or not the charging is performed (S76). The distance from the device is taken out (S77), and it is determined whether or not the charged low-voltage customer is closer to the transformer than the low-voltage customer where the power failure occurred (S78). It is determined that the cause of the power failure of the low-voltage customer is that occurred in the home of the low-voltage customer (S79).

  According to Example 6, since it is possible to determine whether the power outage is only in the home of the low voltage customer or the power outage due to the equipment of the low voltage distribution line, when there is a power outage inquiry from the low voltage customer to the power company, You can immediately answer whether the cause of the power outage is in a higher-order system than the low-voltage power distribution system or in the home of the low-voltage customer. In addition, when there is a cause in the home of the low-voltage customer, it is possible to omit the worker dispatched from the power company from going to a wasteful investigation.

  FIG. 13 is a flowchart showing the processing contents of the home server 22 in Embodiment 7 of the present invention, and FIG. 14 is a flowchart showing the processing contents of the low-voltage system monitoring device 1 in Embodiment 7 of the present invention. In the seventh embodiment, in addition to the first embodiment, the home server 22 determines whether or not the voltage value measured by the electrical quantity measuring device 1 satisfies the specified voltage. The low-voltage system monitoring device 1 receives the specified voltage deviation information of the low-voltage consumer in addition to the low-voltage consumer identification number and voltage value so that the processing for the specified voltage deviation can be performed.

  As shown in FIG. 13, the home server 22 receives the voltage value from the electrical quantity measuring device 21 (S81), and determines whether the received voltage value deviates from the specified value or returns from the specified value deviation. When the occurrence of the specified value deviation or the return from the specified value deviation is made (S82), a flag indicating the occurrence or return of the specified value deviation and the low-pressure customer identification number are transmitted to the low-voltage system monitoring device 1 (S83).

  As shown in FIG. 14, the low-voltage system monitoring device 1 receives from the home server 22 a flag indicating the occurrence or return of the specified value and the low-pressure customer identification number (S91), and sets the low-voltage customer identification number as the low-voltage customer identification number. A search is made from the database 14 to identify a low voltage consumer (S92), and processing for supply voltage deviation is performed (S93). Since the processing for the supply voltage deviation cannot be solved in the low-voltage distribution system, it is notified by notifying the system monitoring the high-voltage distribution system and adjusting the supply voltage.

  According to the seventh embodiment, since the low-voltage customer identification number deviating from the specified voltage is transmitted from the home server 22, it is possible to immediately detect that the supply voltage value has fallen below the specified supply voltage value. For this reason, it is possible to immediately adjust the voltage in the high-voltage distribution system that is the supply source of the low-voltage consumer that deviates from the specified supply voltage value. Therefore, stable power supply can be performed in real time.

  FIG. 15 is a flowchart showing the processing contents of the home server according to the eighth embodiment of the present invention. In the eighth embodiment, in addition to the first embodiment, when the home server 22 assigns a low voltage consumer identification number to the voltage value measured by the electric quantity measuring device 21 and transmits it to the public communication line, the low voltage consumer's It is determined whether or not the connected high-voltage distribution line has a power failure. If the high-voltage distribution line has a power failure, the voltage value and the low-voltage customer identification number measured by the electric quantity measuring device 21 are used as the low-voltage system. The information is not transmitted to the monitoring device 1.

  In FIG. 15, a voltage value is received from the electrical quantity measuring device 21 (S101), the power supply state of the supply section to the low voltage consumer of the high voltage distribution system is acquired from the low voltage system monitoring device 1 (S102), and the power supply state Is determined whether or not a power failure has occurred in the high-voltage distribution system (S103), and the voltage value of the low-voltage consumer is transmitted to the low-voltage system monitoring device 1 only when a power failure has not occurred (S104). . That is, when the high-voltage distribution line has a power failure, the voltage measured on the low-voltage consumer side and the low-voltage demand identification number are not transmitted from the home server 22 to the low-voltage system monitoring device 1.

  According to Example 8, when the cause of the power failure occurring in the low-voltage customer is the high-voltage distribution line, data is not transmitted from the low-voltage customer. It can be avoided that transmissions are concentrated in the low-voltage system monitoring device 1 and a load is applied to the system.

  FIG. 16 is a flowchart showing the processing contents of the home server according to the ninth embodiment of the present invention. In the ninth embodiment, in addition to the eighth embodiment, when the high-voltage distribution line has a power failure, a message indicating that a power failure has occurred due to a high-voltage distribution line failure in a battery-equipped display terminal installed in the house of a low-voltage consumer. Is displayed and output.

In FIG. 16, the voltage value is received from the electrical quantity measuring device 21 (S111),
The power supply state of the supply section to the low voltage consumer of the high voltage distribution system is acquired from the low voltage system monitoring device 1 (S112), and it is determined whether or not a power failure has occurred in the high voltage distribution system based on the power supply state. (S113) A message is displayed on the home display terminal 23 that can be transmitted from the home server 22 only when a power failure has occurred (S114). As a message in this case, a message such as “The current power outage is due to a high voltage distribution system fault. Please wait for a while” is displayed.

  According to the ninth embodiment, when the high-voltage distribution line has a power failure, a message indicating a power failure due to a high-voltage distribution line accident is provided to the home display terminal 23 installed in the low-voltage consumer house. The customer can understand the cause of the power outage without inquiring of the power company.

  FIG. 17 is a flowchart showing the processing contents of the home server 22 in Embodiment 10 of the present invention, and FIG. 18 is a flowchart showing the processing contents of the low-voltage system monitoring apparatus 1 in Embodiment 10 of the present invention. In the tenth embodiment, in addition to the first embodiment, the electric quantity measuring device 21 measures the current in the house, and the home server 22 assigns a low voltage consumer identification number to the current value measured by the electric quantity measuring device 21. The low-voltage system monitoring device 1 determines the transformer that supplies power to the low-voltage consumer in advance corresponding to the low-voltage consumer identification number, and is connected to the same transformer. The load of the transformer is calculated based on the current value of each low-voltage consumer, and the utilization factor of the transformer is calculated.

  As shown in FIG. 17, the home server 22 receives the current value from the electricity quantity measuring device 21 (S121), and transmits the received current value and the low-voltage customer identification number to the low-voltage system monitoring device 1 (S122).

  As shown in FIG. 18, in the low-voltage system monitoring apparatus 1, when the current value and the low-voltage customer identification number of the low-voltage consumer are received from the home server 22, the number of transformers registered in the transformer database 15 corresponds to step S 132. To S135 are repeated (S131). And the low voltage | pressure customer supplied from the same transformer is searched from the low voltage | pressure customer database 14, and step S133 to step S134 is repeated by the number of the search results (S132).

  That is, the low voltage consumer identification number of the low voltage consumer is searched from the measured value data 16 to acquire the current value (S133), and the load applied to the transformer is totaled (S134). By repeating this for the low-voltage consumers connected to the same transformer, the total load applied to the transformer is calculated. And the utilization factor is computed from the load for every transformer (S135).

  In this way, the current is measured on the low-voltage consumer side, transmitted from the home server to the low-voltage system monitoring device 1 at regular intervals, and supplied to the low-voltage customer identification number and the low-voltage customer on the low-voltage system monitoring device 1 side. It is determined that power is supplied from a transformer having the same identification number. And the load of a transformer is calculated based on the electric current value of the low voltage consumer connected to the same transformer, and the utilization factor of a transformer is calculated.

  According to the tenth embodiment, since the transformer load is calculated based on the current value of the low-voltage consumer connected to the same transformer and the transformer usage rate is calculated, the usage rate can be recognized for each transformer. It is possible to predict the time for inspection and replacement of the transformer based on the utilization rate.

  FIG. 19 is a flowchart showing the processing contents of the low-voltage system monitoring apparatus 1 in Embodiment 11 of the present invention. In Example 11, in addition to Example 10, the load of each transformer is compared with the total current value of each low-voltage consumer connected to each transformer, and the difference in load is calculated. Is.

  In FIG. 19, when the current value and the low voltage customer identification number of the low voltage consumer are received from the home server 22, the processes from step S142 to step S146 are repeated for the number of transformers registered in the transformer database 15. And the low voltage | pressure consumer supplied from the same transformer is searched from the low voltage | pressure customer database 14, and step S143 to step S144 is repeated by the number of the search results.

  That is, the low voltage consumer identification number of the low voltage consumer is searched from the measurement value database 16 to acquire the current value (S142), and the load applied to the transformer is totaled (S144). By repeating this for the low-voltage consumers connected to the same transformer, the total load applied to the transformer is calculated. And the load of the said transformer is received from another system, The difference of the load of the said transformer received by the sum total of the load calculated by step S144 and step S145 is calculated (S146). At this time, if the difference is large, it can be determined whether wasteful power is consumed or stolen.

  According to the eleventh embodiment, the load of the transformer can be received from another system, and compared with the sum of the current values of a plurality of low-voltage consumers connected to the transformer, the difference in the load can be detected. As a result, it is possible to detect power used without knowing from the low-voltage distribution system, for example, theft.

The block diagram of the low voltage | pressure distribution system monitoring system concerning embodiment of this invention. The block diagram of the low voltage | pressure system monitoring apparatus in the low voltage | pressure distribution system monitoring system concerning embodiment of this invention. Explanatory drawing of the low voltage | pressure customer database in embodiment of this invention. Explanatory drawing of the transformer database in embodiment of this invention. Explanatory drawing of the measured value database in embodiment of this invention. The flowchart which shows the processing content of the home server in Example 1 of this invention. The flowchart which shows the processing content of the low voltage | pressure system monitoring apparatus in Example 1 of this invention. The flowchart which shows the processing content of the home server in Example 2 of this invention. The flowchart which shows the processing content of the low voltage | pressure system monitoring apparatus in Example 3 of this invention. The flowchart which shows the processing content of the low voltage | pressure system monitoring apparatus in Example 4 of this invention. The flowchart which shows the processing content of the low voltage | pressure system monitoring apparatus in Example 5 of this invention. The flowchart which shows the processing content of the low voltage | pressure system monitoring apparatus in Example 6 of this invention. The flowchart which shows the processing content of the home server in Example 7 of this invention. The flowchart which shows the processing content of the low voltage | pressure system monitoring apparatus in Example 7 of this invention. The flowchart which shows the processing content of the home server in Example 8 of this invention. The flowchart which shows the processing content of the home server in Example 9 of this invention. The flowchart which shows the processing content of the home server in Example 10 of this invention. The flowchart which shows the processing content of the low voltage | pressure system monitoring apparatus in Example 10 of this invention. The flowchart which shows the processing content of the low voltage | pressure system monitoring apparatus in Example 11 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Low voltage system monitoring apparatus, 2 ... Low voltage consumer, 3 ... Internet, 4 ... Low voltage distribution line, 5 ... Transformer, 6 ... High voltage distribution line, 7 ... Switch, 8 ... Distribution board, 9 ... 10, ... Response receiving unit, 11 ... low-voltage customer information verification unit, 12 ... low-voltage system state determination unit, 13 ... blackout customer data output unit, 14 ... low-voltage customer database, 15 ... transformer database, 16 ... measurement value database, 17 DESCRIPTION OF SYMBOLS ... Map database, 18 ... Display part, 21 ... Electric quantity measuring device, 22 ... Home server, 23 ... In-home display terminal, 24 ... Electric quantity receiving part, 25 ... State determination part, 26 ... Low voltage consumer identification number storage part

Claims (11)

  An electrical quantity measuring device that is arranged in the home of each low-voltage consumer connected to the low-voltage power distribution system and measures the voltage in the home, and a low-voltage consumer identification number for identifying each low-voltage consumer is stored in advance. A home server that assigns the low-voltage consumer identification number to the voltage value measured by the electrical quantity measuring device and transmits it to the public communication line, and the low-voltage demand transmitted from the home server of each low-voltage consumer to the public communication line A low voltage distribution system monitoring system comprising: a low voltage system monitoring device that receives a house identification number and a voltage value and monitors the low voltage distribution system using the received low voltage customer identification number and voltage value.   The home server determines whether or not there is a power failure based on the voltage value measured by the electrical quantity measuring device, and if it is a power failure, transmits that fact to the public communication line. 2. The low-voltage distribution system monitoring system according to claim 1, wherein in addition to the house identification number and voltage value, the power failure information of the low-voltage consumer is also received.   The low-voltage system monitoring device stores the address of the low-voltage customer in advance corresponding to the low-voltage customer identification number, and when receiving the power failure information of the low-voltage customer, the low-voltage customer address is centered. 3. The low voltage distribution system monitoring system according to claim 2, wherein the electronic map is cut out and displayed at a predetermined size.   The low-voltage system monitoring device stores an address of a transformer that supplies power to the low-voltage consumer in advance corresponding to the low-voltage consumer identification number, and receives the power outage information of the low-voltage consumer 3. The low voltage distribution system monitoring system according to claim 2, wherein an electronic map centering on the address of the transformer is cut out and displayed in a predetermined size.   When the low-voltage system monitoring device receives the power outage information of the low-voltage consumer, the distance from the position where the transformer supplying power to the low-voltage consumer is installed to the low-voltage consumer, The low voltage distribution system monitoring system according to claim 2, wherein a power failure range of the low voltage distribution system to which electric power is supplied from the transformer is detected.   When the low-voltage system monitoring device receives the power failure information of the low-voltage customer, the low-voltage system monitoring device searches for a non-power failure low-voltage customer connected to a transformer supplying power to the low-voltage customer, and the transformer is Collate the distance from the installed location to the non-blackout low-voltage consumer and the distance to the blackout low-voltage customer to determine whether the power outage is only in the home of the low-voltage customer or due to the equipment of the low-voltage distribution line The low-voltage distribution system monitoring system according to claim 2, wherein:   The home server determines whether or not the voltage value measured by the electrical quantity measuring device satisfies a specified voltage, and when it deviates from the specified voltage, transmits the fact to the public communication line, and the low voltage system 2. The low-voltage distribution system monitoring system according to claim 1, wherein the monitoring device receives not only the low-voltage consumer identification number and the voltage value but also information on a predetermined voltage deviation of the low-voltage consumer.   When the home server assigns the low-voltage consumer identification number to the voltage value measured by the electricity quantity measuring device and transmits the voltage to a public communication line, the high-voltage distribution line connected to the low-voltage consumer If the high-voltage distribution line is out of power, the voltage value measured by the electricity quantity measuring device and the low-voltage consumer identification number are not transmitted to the public communication line. The low-voltage distribution system monitoring system according to claim 1, wherein   When the high-voltage distribution line has a power failure, the home server displays and outputs a message indicating that a power failure has occurred due to a high-voltage distribution line accident in a battery built-in display terminal installed in a low-voltage consumer's house. The low-voltage distribution system monitoring system according to claim 8.   The electrical quantity measuring device measures the current in the house, and the home server assigns the low voltage consumer identification number to the current value measured by the electrical quantity measuring device and transmits it to a public communication line, and the low voltage system The monitoring device discriminates a transformer that supplies power to the low voltage consumer in advance corresponding to the low voltage consumer identification number, and based on a current value of each low voltage consumer connected to the same transformer. The low voltage distribution system monitoring system according to claim 1, wherein the utilization factor of the transformer is calculated by calculating a load of the transformer. The low-voltage system monitoring device compares a load of each transformer with a total current value of each low-voltage consumer connected to each transformer, and calculates a difference in load. Item 11. The low-voltage distribution system monitoring system according to Item 10.

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