JP3619522B2 - Substation cooling system - Google Patents
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- 238000001816 cooling Methods 0.000 title claims description 189
- 239000000498 cooling water Substances 0.000 claims description 219
- 239000002826 coolant Substances 0.000 claims description 59
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- 238000004804 winding Methods 0.000 claims description 16
- 239000003507 refrigerant Substances 0.000 claims description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 238000005338 heat storage Methods 0.000 claims description 11
- 238000005086 pumping Methods 0.000 claims description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 230000001172 regenerating effect Effects 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims 6
- 239000012212 insulator Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 239000012774 insulation material Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
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Description
技術分野
本発明は変電所冷却システムに係り、特に、変電所、例えば地下変電所に設置される変圧器を過負荷運転した場合に生じる変圧器構造物の温度上昇を抑制するものに好適な変電所冷却システムに関する。
背景技術
近年、都心部に設置される変電所の変圧器は防災上不燃化が要求され、また、電力需要の増大から大容量化、さらに、設置場所の確保が困難となってきているので、小型化の要求も強く、変圧器をビル等の地下に設置する例が多くなってきている。また、エネルギーの有効利用の観点から、変圧器等で発生する熱をできるだけ高温で回収し、ビル設備の給湯や暖房等の熱源に利用する場合も増加している。
一般に、変圧器をビル等の地下に設置する場合には、変圧器構造物で発生する熱を変圧器を冷却する冷却媒体に伝達すると共に、水冷式冷却器を介して冷却水に伝達し、この冷却水をポンプによりビルの屋上等に設置した冷却塔へ汲み上げ、冷却塔で冷却した後、変圧器の水冷式冷却へ戻す構成を採っている。排熱利用する場合には、変圧器用水冷式冷却器から冷却塔へ汲み上げる冷却水の一部を給湯等の熱負荷側へ分岐することもある。
また、変電所では、複数の変圧器を設置する例が多いが、ここで、ある変圧器が故障したり、運転不可能になった場合に、他の変圧器を一時的に過負荷運転せざるを得ない場合がある。変圧器を過負荷運転すると、変圧器巻線に流れる電流が増大してしまう結果、変圧器の発熱量が増加し、このため変圧器巻線等の構造物やこれら構造物に接触している絶縁物，構造物を冷却する冷却媒体やこの冷却媒体を冷やす冷却水の温度が上昇する。特に、絶縁物は温度が過度に高くなると寿命が短くなり、信頼性が低下する。
このような状況を想定し、従来は、過負荷運転による温度に耐える耐熱絶縁材料を使用するか、あるいは使用する絶縁材料の耐熱温度以下に温度上昇を抑えるような、余裕のある変圧器の設計をしている。高温度に耐える絶縁材料は一般に高価であり、また、構造物の温度上昇を抑える余裕のある設計では、巻線の断面積を大きくし電流密度を下げる設計をすることになり、変圧器全体の体積や重量が大きくなる。
また、変圧器の過負荷対応策として、変圧器用の冷却器の他に、変圧器冷却媒体の貯蔵槽を設け、変圧器の過負荷運転時に冷却器から戻る冷却媒体に、前記貯蔵槽の低温の冷却媒体を一部混合させ、変圧器へ入る冷却媒体の温度を下げることが特開昭59−5607号公報で提案されている。
しかしながら、この例では、過負荷運転する場合の時間や発熱量を考慮すると、貯蔵槽は相当大きな体積になり大きなスペースが必要になる。また、熱容量を考慮すると、冷却媒体は液状の場合に限られ、冷却媒体がガスであるガス絶縁変圧器の場合に適用することはほとんど不可能である。
本発明は上述の点に鑑みなされたもので、その目的とするところは、地下変電所等に設置される変圧器からの熱を有効に給湯等に利用できる温度で熱回収できる条件を維持させつつ変圧器が小型化できることは勿論、変圧器を一時的に過負荷運転する場合でも構造物の温度上昇を過度に大きくすることなく、絶縁物の寿命を短縮させない変電所冷却システムを提供するにある。
発明の開示
本発明は、巻線や鉄心を含み冷却媒体で冷却される変圧器本体，該変圧器本体の冷却媒体を冷却する水冷式冷却器，該水冷式冷却器と前記変圧器本体とを接続する配管，該配管の途中に設置され、前記冷却媒体を循環させる冷媒循環機，前記水冷式冷却器からの冷却水を冷却する冷却塔，該冷却塔と前記水冷式冷却器とを接続する配管，該配管の途中に設置され、前記冷却水を循環させる冷却水循環ポンプからなる変圧器冷却系統と、
地下ケーブルが配設されている洞道，該洞道及び前記地下ケーブルを冷却するための低温冷却水と洞道及び前記地下ケーブルを冷却した後に排出される高温冷却水とを蓄える蓄冷熱槽，該蓄冷熱槽と配管により接続され、蓄冷熱槽からの高温冷却水を冷却し低温冷却水として該蓄冷熱槽に戻す冷凍機からなる洞道冷却系統とを備え、
変圧器の過負荷運転時に前記蓄冷熱槽に蓄えられている低温冷却水の一部を、前記変圧器冷却系統の水冷式冷却器へ入る配管の途中に導く手段を有することを特徴とする。
これにより、地下変電所等に設置される変圧器からの熱を有効に給湯等に利用できる温度で熱回収できる条件を維持させつつ変圧器が小型化できることは勿論、変圧器を一時的に過負荷運転する場合でも構造物の温度上昇を過度に大きくすることなく、絶縁物の寿命を短縮させない変電所冷却システムを得ることができる。
変圧器が複数台同一変電所に設置されている場合には、前記蓄冷熱層から低温水を汲み上げ変圧器用の水冷式冷却器へ配水する複数の配管を、流量調整弁の後流側から分岐させて設け、その分岐後の配管の途中に止め弁を設ける構成にする。なお、前記止め弁には、過負荷運転する変圧器の水冷式冷却器に流れるように、前記制御装置により「開」の信号が送られる。
【図面の簡単な説明】
第１図は本発明の変電所冷却システムの一実施例を示す概略図、第２図は本発明の一実施例における変圧器負荷と主要な流体の時間に対する温度変化の状況を示す特性図、第３図は本発明の変電所冷却システムの他の実施例を示す概略図である。
発明を実施するための最良の形態
本発明をより詳述するために、添付の図面に従ってこれを説明する。
第１図は本発明の変電所冷却システムの一実施例を示し、地下ケーブル洞道の冷却システムのある地下変電所の例で、洞道の冷却システムに必要な冷凍機，洞道を冷却する低温冷却水や戻ってきた冷却水を溜めておく蓄冷熱槽が設置されている例である。
該図において、１は変圧器本体、２は変圧器本体１の冷却媒体３を冷却水４で冷却する水冷式冷却器、５は冷却媒体３を循環させるポンプあるいはブロワ等の冷媒循環機、6aは変圧器本体１と水冷式冷却器２を接続する配管、6bは水冷式冷却器２とブロワ等の冷媒循環機５を接続する配管である。また、７は冷却水４を大気で冷却する冷却塔、８は冷却水４を冷却塔７へ送る冷却水循環ポンプ、9aは冷却水４を冷却塔７へ導く上昇管、9bは冷却塔７からの冷却水４の戻り管である。10は地下ケーブルを配設した洞道、11は洞道10内の空間及び地下ケーブルを冷却するのに用いられる低温冷却水14aや地下ケーブルを冷却した後の高温冷却水14bを溜めておく蓄冷熱槽、12は高温冷却水14bを冷却する冷凍機、13は冷凍機12用の冷却塔である。15aは蓄冷熱槽11の低温冷却水14aを洞道10に洞道冷却用冷却水を流す送水管、15bは洞道10からの高温になった洞道冷却用冷却水を蓄冷熱槽11に戻す戻り管である。送水管15aには、低温冷却水14aを汲み上げ送水管15aに送るポンプ16がある。また、17aは蓄冷熱槽11より高温冷却水14bを冷凍機12に送る配管、17bは冷凍機12で冷却された低温冷却水14aを蓄冷熱槽11に送る配管、18は配管17aの途中に配置される高温冷却水14bを汲み上げる汲み上げポンプ、19bは冷凍機12より冷却塔13に冷却水を輸送する配管、19aは冷却塔13から冷凍機12に冷却水を戻す配管、20は配管19bの途中に配置されている冷却水を循環させるポンプである。
また、21は蓄冷熱槽11から低温冷却水14aをポンプ22で汲み上げ戻り管9bに混入させる配管、23は戻り管9bへの低温冷却水の流量を調節する流量調整弁である。24は戻り管9bから冷却塔７から戻る冷却水の一部を蓄冷熱槽11へ戻す配管、25は配管24の途中に配置されている止め弁である。26は冷却塔７から水冷式冷却器２へ入る冷却水の温度を検知する温度計、27は、この温度計26の信号によりポンプ22の運転や流量調整弁23の開度を指令する制御装置である。
このような構成の地下変電所冷却システムにおいて、通常の負荷での運転状態ではポンプ22は運転されず、流量調整弁23、及び止め弁25は閉の状態で変電所は運転される。
通常の運転時は、変圧器本体１内の構造物で発熱があるが、冷却媒体３がポンプあるいは冷媒循環機（ブロワ）５により変圧器本体１内に送られることにより、変圧器本体１の構造物が冷却され、熱を奪った冷却媒体３は変圧器本体１の上部より取り出され、配管6aを経由して水冷式冷却器２に導かれ冷却される。水冷式冷却器２で冷却された冷却媒体は再度配管6bを通って変圧器本体１に戻る。一方、冷却水４は冷却水循環ポンプ８により、水冷式冷却器２を経由して上昇管9aを上昇し冷却塔７に導かれて冷却され、この冷却塔７により冷却された冷却水４は、戻り管9bを通り水冷式冷却器２に戻る経路を循環する。
また、地下ケーブルが配設された洞道10を冷却する系統は、蓄冷熱槽11の高温冷却水14bが汲み上げポンプ18により配管17aを通って冷凍機12に送られ、低温冷却水となり、配管17bにより蓄冷熱槽11の低温側へ戻り低温冷却水14aとして蓄積させる。一方、冷凍機12からの排熱は冷却塔３により大気へ放熱される。
洞道10内及びその内部の地下ケーブルは、蓄冷熱槽11の低温冷却水14aがポンプ16により配管15aを経由して洞道10内に導かれることにより冷却され、冷却後の冷却水は、配管15bを通って蓄冷熱槽11に戻り高温冷却水14bとなる。なお、蓄冷熱槽11の水は、低負荷時や夜間等に低温冷却水14aの量が増加し、高温冷却水14bの量が少なくなる。
ここで、ある変圧器が故障あるいは運転不可能になり、他のいずれかの変圧器を一時的に過負荷運転する場合、過負荷運転する変圧器の発熱量は増大し、巻線等の変圧器構造物は温度が徐々に上昇してしまい、これにより変圧器本体１を冷却する冷却媒体3,冷却媒体３を冷却する冷却水４も徐々に温度が上昇する。
このような状態で、冷却塔７から水冷式冷却器２へ入る冷却水の温度が所定値以上になると、温度計26からの信号により制御装置27が働いてポンプ22が起動し、また、流量調整弁23が開き、蓄冷熱槽11から低温冷却水14aが汲み上げられて配管21を通り、戻り管9bの冷却水循環ポンプ８の上流側へ混入される。混入された低温冷却水14aの流量は、温度計26で検知される温度が所定値になるように制御装置27により流量調整弁23の開度が調整される。また、低温冷却水14aの混入が開始すると配管24にある止め弁25が開き、混入された低温冷却水14aの流量と同程度の冷却水が、配管24を通って蓄冷熱槽11の高温冷却水14b側へ流入する。なお、冷却塔７からの冷却水に混入させる低温冷却水14aの流量は、過負荷運転される負荷の値と、予想される持続時間により推定でき、蓄冷熱槽11の大きさを設定すればよい。
このような運転により、変圧器が過負荷運転された場合にも冷却水４の温度は大幅に所定値を越えることが無く、従って、冷却媒体３の温度，変圧器構造物の温度や絶縁物の温度も過度に高くならず寿命を維持できる。
第２図は第１図に示す実施例における変圧器の負荷と主要な位置での構造物や各流体の温度変化状況を時間に対して示す特性図で、破線は従来技術の場合、実線は本実施例の場合の温度変化状況を示す。
該図に示すごとく、変圧器の負荷が上昇すると前述のように変圧器本体１の構造物の発熱量が増大し、温度が上昇する。それにつれて、各部の流体も構造物から熱を受け温度上昇が大きくなる。従来技術の場合は、構造物の温度は徐々に温度が上昇し過負荷運転が続く限り単調に上昇するが、本実施例の場合には、水冷式冷却器２に入る冷却水の温度が一定値に達すると、低温冷却水4aが混入されるためほぼ一定に抑えられ、それにつれて各部の温度上昇は低く抑えられ、構造物、特に巻線の最高温度も抑えられる。
第３図は、本発明による他の実施例を示す変電所冷却システム概略図である。この例では、変圧器本体１が複数台あり、過負荷運転する変圧器本体１が予め指定できない場合、各変圧器本体１の水冷式冷却器２の冷却水入口側へ低温冷却水14aを混入させる構成を示すものである。
本実施例では設置する機器を簡素化するため、蓄冷熱層11からの低温冷却水14aを汲み上げるポンプ22、及び低温冷却水14a用の流量調整弁23を１台とし、流量調整弁23の後流側で分岐し、冷却器側に止め弁28を介して各水冷式冷却器２へ低温冷却水14aを分岐する構成にする。なお、各変圧器の水冷式冷却器２の冷却水の入り口側には、第１図に示したのと同様に、冷却水の温度を検出する温度計26を設置する。また、制御装置27では、過負荷運転させる変圧器の指定と、指定された変圧器に合わせて開くべき止め弁28へ「開」にすべき信号を送るようにする。さらに、前記制御装置27から同時に、冷却塔７からの冷却水４を蓄冷熱槽11に戻す配管24の途中に止め弁25を設ける。
このような構成において、過負荷運転に入った変圧器の構造物は徐々に温度が上昇し、冷却媒体３及び冷却水４の温度も上昇する。冷却塔７からの冷却水４の温度が一定値以上になると、低温冷却水14aの汲み上げポンプ22が起動し、止め弁25が開き水冷式冷却器２への冷却水４に低温冷却水14aが混入する。これにより、過負荷運転時でも冷却水４の温度は過度に高くなることが無く、従って、変圧器構造物及び絶縁物の温度も過度に高くなることがない。
産業上の利用可能性
以上説明した本発明の変電所冷却システムによれば、巻線や鉄心を含み冷却媒体で冷却される変圧器本体，該変圧器本体の冷却媒体を冷却する水冷式冷却器，該水冷式冷却器と前記変圧器本体とを接続する配管，該配管の途中に設置され、前記冷却媒体を循環させる冷媒循環機，前記水冷式冷却器からの冷却水を冷却する冷却塔，該冷却塔と前記水冷式冷却器とを接続する配管，該配管の途中に設置され、前記冷却水を循環させる冷却水循環ポンプからなる変圧器冷却系統と、
地下ケーブルが配設されている洞道，該洞道及び前記地下ケーブルを冷却するための低温冷却水と洞道及び前記地下ケーブルを冷却した後に排出される高温冷却水とを蓄える蓄冷熱槽，該蓄冷熱槽と配管により接続され、蓄冷熱槽からの高温冷却水を冷却し低温冷却水として該蓄冷熱槽に戻す冷凍機からなる洞道冷却系統とを備え、
変圧器の過負荷運転時に前記蓄冷熱槽に蓄えられている低温冷却水の一部を、前記変圧器冷却系統の水冷式冷却器へ入る配管の途中に導く手段を有するものであるから、
地下変電所等に設置される変圧器からの熱を有効に給湯等に利用できる温度で熱回収できる条件を維持させつつ変圧器が小型化できることは勿論、変圧器を一時的に過負荷運転する場合でも構造物の温度上昇を過度に大きくすることなく、絶縁物の寿命を短縮させない変電所冷却システムを得ることができる。TECHNICAL FIELD The present invention relates to a substation cooling system, and more particularly to a substation suitable for suppressing a temperature rise of a transformer structure that occurs when a transformer installed in a substation, for example, an underground substation, is overloaded. Office cooling system.
Background Art In recent years, transformers of substations installed in the city center are required to be non-combustible for disaster prevention, and because of the increase in power demand, it has become difficult to secure installation locations. There is a strong demand for miniaturization, and there are many examples in which transformers are installed in the basement of buildings and the like. In addition, from the viewpoint of effective use of energy, cases where heat generated by a transformer or the like is recovered as high as possible and used for a heat source such as hot water supply or heating of a building facility are increasing.
In general, when installing a transformer in the basement of a building or the like, the heat generated in the transformer structure is transmitted to a cooling medium that cools the transformer, and is also transmitted to cooling water through a water-cooled cooler. This cooling water is pumped up to a cooling tower installed on the rooftop of the building, cooled by the cooling tower, and then returned to the water-cooled cooling of the transformer. When using exhaust heat, a part of the cooling water pumped from the water-cooled cooler for transformers to the cooling tower may be branched to the heat load side such as hot water supply.
Substations often have multiple transformers installed, but if a transformer breaks down or becomes inoperable, other transformers are temporarily overloaded. There are cases where it is unavoidable. When a transformer is overloaded, the current flowing in the transformer winding increases, resulting in an increase in the amount of heat generated by the transformer, and thus the structure such as the transformer winding and these structures are in contact with each other. The temperature of the cooling medium for cooling the insulator and the structure and the cooling water for cooling the cooling medium rise. In particular, when the temperature of the insulator is excessively high, the life is shortened and the reliability is lowered.
Assuming such a situation, conventionally, a heat-resistant insulation material that can withstand the temperature caused by overload operation is used, or a transformer design that can afford to suppress the temperature rise below the heat resistance temperature of the insulation material to be used I am doing. Insulating materials that can withstand high temperatures are generally expensive, and in designs that can afford to suppress the temperature rise of the structure, the cross-sectional area of the winding must be increased to reduce the current density. Volume and weight increase.
Also, as a countermeasure against transformer overload, in addition to the transformer cooler, a storage tank for the transformer cooling medium is provided, and the low temperature of the storage tank is used as a cooling medium that returns from the cooler when the transformer is overloaded. Japanese Laid-Open Patent Publication No. 59-5607 proposes that a part of the cooling medium is mixed to lower the temperature of the cooling medium entering the transformer.
However, in this example, the storage tank has a considerably large volume and requires a large space in consideration of the time and the amount of heat generated in the overload operation. In consideration of the heat capacity, the cooling medium is limited to a liquid state, and it is almost impossible to apply to a gas-insulated transformer in which the cooling medium is a gas.
The present invention has been made in view of the above points, and the object of the present invention is to maintain conditions under which heat can be recovered at a temperature at which heat from a transformer installed in an underground substation or the like can be effectively used for hot water supply or the like. To provide a substation cooling system that not only shortens the life of the insulator without excessively increasing the temperature rise of the structure even when the transformer is temporarily overloaded, while the transformer can be downsized. is there.
DISCLOSURE OF THE INVENTION The present invention includes a transformer body including a winding and an iron core and cooled by a cooling medium, a water-cooled cooler that cools the cooling medium of the transformer body, the water-cooled cooler, and the transformer body. A pipe to be connected, a refrigerant circulator installed in the pipe and circulating the cooling medium, a cooling tower for cooling cooling water from the water-cooled cooler, and the cooling tower and the water-cooled cooler are connected A transformer cooling system comprising a piping, a cooling water circulation pump installed in the middle of the piping and circulating the cooling water;
A cave in which an underground cable is arranged, a cold storage water tank for storing a low-temperature cooling water for cooling the cave and the underground cable, and a high-temperature cooling water discharged after cooling the cave and the underground cable, A cooling system connected to the cold storage heat tank by a pipe, and comprising a cave cooling system consisting of a refrigerator that cools the high-temperature cooling water from the cold storage heat tank and returns it to the cold storage heat tank as low-temperature cooling water,
It has a means which guides a part of the low-temperature cooling water stored in the cold storage heat tank during overload operation of the transformer to the middle of the pipe entering the water cooling type cooler of the transformer cooling system.
As a result, the transformer can be reduced in size while maintaining the condition that heat from a transformer installed in an underground substation can be effectively used for hot water supply, etc. Even when a load operation is performed, a substation cooling system that does not shorten the lifetime of the insulator can be obtained without excessively increasing the temperature of the structure.
When multiple transformers are installed in the same substation, multiple pipes that draw low-temperature water from the cold storage heat layer and distribute it to the water-cooled cooler for the transformer branch from the downstream side of the flow control valve The stop valve is provided in the middle of the pipe after branching. Note that the control device sends an “open” signal to the stop valve so as to flow to the water-cooled cooler of the transformer that is overloaded.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing an embodiment of a substation cooling system according to the present invention, and FIG. 2 is a characteristic diagram showing a temperature change state with respect to time of a transformer load and main fluid in an embodiment of the present invention, FIG. 3 is a schematic view showing another embodiment of the substation cooling system of the present invention.
BEST MODE FOR CARRYING OUT THE INVENTION In order to describe the present invention in more detail, it will be described with reference to the accompanying drawings.
FIG. 1 shows an embodiment of a substation cooling system according to the present invention, which is an example of an underground substation with an underground cable cave cooling system, which cools a refrigerator and a cave required for the cave cooling system. This is an example in which a cold storage heat tank for storing low-temperature cooling water or returning cooling water is installed.
In the figure, 1 is a transformer body, 2 is a water-cooled cooler that cools a
In the underground substation cooling system having such a configuration, the
During normal operation, the structure in the transformer body 1 generates heat, but the
Also, in the system for cooling the
The inside of the
Here, when a transformer breaks down or becomes inoperable and any of the other transformers is temporarily overloaded, the amount of heat generated by the overloaded transformer increases, and The temperature of the vessel structure gradually increases, and accordingly, the
In such a state, when the temperature of the cooling water entering the water-cooled
By such operation, even when the transformer is overloaded, the temperature of the cooling water 4 does not greatly exceed a predetermined value. Therefore, the temperature of the
FIG. 2 is a characteristic diagram showing the load change of the transformer in the embodiment shown in FIG. 1 and the temperature change state of the structure and each fluid at main positions with respect to time. The broken line is the case of the prior art, and the solid line is The temperature change state in the case of a present Example is shown.
As shown in the figure, when the load on the transformer rises, the amount of heat generated by the structure of the transformer body 1 increases as described above, and the temperature rises. Accordingly, the fluid of each part also receives heat from the structure and increases in temperature. In the case of the prior art, the temperature of the structure gradually increases and rises monotonically as long as the overload operation continues. In this embodiment, the temperature of the cooling water entering the water-cooled
FIG. 3 is a schematic diagram of a substation cooling system showing another embodiment according to the present invention. In this example, when there are a plurality of transformer main bodies 1 and the transformer main body 1 to be overloaded cannot be designated in advance, low-
In this embodiment, in order to simplify the equipment to be installed, the
In such a configuration, the temperature of the transformer structure that has entered the overload operation gradually increases, and the temperatures of the
INDUSTRIAL APPLICABILITY According to the substation cooling system of the present invention described above, a transformer body including a winding and an iron core and cooled by a cooling medium, and a water-cooled cooler for cooling the cooling medium of the transformer body. , A pipe connecting the water-cooled cooler and the transformer body, a refrigerant circulator installed in the middle of the pipe for circulating the cooling medium, a cooling tower for cooling the cooling water from the water-cooled cooler, A pipe for connecting the cooling tower and the water-cooled cooler, a transformer cooling system installed in the middle of the pipe and including a cooling water circulation pump for circulating the cooling water;
A cave in which an underground cable is arranged, a cold storage water tank for storing a low-temperature cooling water for cooling the cave and the underground cable, and a high-temperature cooling water discharged after cooling the cave and the underground cable, A cooling system connected to the cold storage heat tank by a pipe, and comprising a cave cooling system consisting of a refrigerator that cools the high-temperature cooling water from the cold storage heat tank and returns it to the cold storage heat tank as low-temperature cooling water,
Since it has means for guiding a part of the low-temperature cooling water stored in the cold storage heat tank during overload operation of the transformer to the middle of the pipe entering the water cooling type cooler of the transformer cooling system,
The transformer can be downsized while maintaining the conditions that heat from the transformer installed in an underground substation can be effectively recovered at a temperature that can be used for hot water supply, etc. Even in this case, it is possible to obtain a substation cooling system that does not shorten the lifetime of the insulator without excessively increasing the temperature rise of the structure.
Claims (11)
地下ケーブルが配設されている洞道、該洞道及び前記地下ケーブルを冷却するための低温冷却水と洞道及び前記地下ケーブルを冷却した後に排出される高温冷却水とを蓄える蓄冷熱槽、該蓄冷熱槽と配管により接続され、蓄冷熱槽からの高温冷却水を冷却し低温冷却水として該蓄冷熱槽に戻す冷凍機からなる洞道冷却系統とを備え、
変圧器の過負荷運転時に前記蓄冷熱槽に蓄えられている低温冷却水の一部を、前記変圧器冷却系統の水冷式冷却器へ入る配管の途中に導く手段を有することを特徴とする変電所冷却システム。A transformer body including a winding and an iron core and cooled by a cooling medium, a water-cooled cooler that cools the cooling medium of the transformer body, a pipe that connects the water-cooled cooler and the transformer body, A refrigerant circulator that is arranged in the middle and circulates the cooling medium, a cooling tower that cools cooling water from the water-cooled cooler, a pipe that connects the cooling tower and the water-cooled cooler, and in the middle of the pipe A transformer cooling system which is arranged and includes a cooling water circulation pump for circulating the cooling water;
A cave in which an underground cable is disposed, a cold storage heat storage tank for storing low-temperature cooling water for cooling the cave and the underground cable, and a high-temperature cooling water discharged after cooling the cave and the underground cable, A cooling system connected to the cold storage heat tank by a pipe, and comprising a cave cooling system consisting of a refrigerator that cools the high-temperature cooling water from the cold storage heat tank and returns it to the cold storage heat tank as low-temperature cooling water,
A substation characterized in that it has means for guiding a part of the low-temperature cooling water stored in the regenerator heat tank during overload operation of the transformer to the middle of the pipe that enters the water-cooled cooler of the transformer cooling system. Cooling system.
地下ケーブルが配設されている洞道、該洞道及び前記地下ケーブルを冷却するための低温冷却水と洞道及び前記地下ケーブルを冷却した後に排出される高温冷却水とを蓄える蓄冷熱槽、該蓄冷熱槽と配管により接続され、蓄冷熱槽からの高温冷却水を冷却し低温冷却水として該蓄冷熱槽に戻す冷凍機からなる洞道冷却系統とを備え、
前記変圧器冷却系統の水冷式冷却器へ入る配管の途中に、前記蓄冷熱槽に蓄えられている低温冷却水の一部を導く配管を接続すると共に、前記水冷式冷却器入口と低温冷却水が導かれる部分との間の配管に前記水冷式冷却器に入る冷却水の温度を検出する温度計を設け、該温度計で検出する前記水冷式冷却器に入る冷却水の温度が所定値以上になったら、前記蓄冷熱槽に蓄えられている低温冷却水の一部を、前記変圧器冷却系統の水冷式冷却器へ入る配管の途中に導くことを特徴とする変電所冷却システム。A transformer body including a winding and an iron core and cooled by a cooling medium, a water-cooled cooler that cools the cooling medium of the transformer body, a pipe that connects the water-cooled cooler and the transformer body, A refrigerant circulator that is arranged in the middle and circulates the cooling medium, a cooling tower that cools cooling water from the water-cooled cooler, a pipe that connects the cooling tower and the water-cooled cooler, and in the middle of the pipe A transformer cooling system which is arranged and includes a cooling water circulation pump for circulating the cooling water;
A cave in which an underground cable is disposed, a cold storage heat storage tank for storing low-temperature cooling water for cooling the cave and the underground cable, and a high-temperature cooling water discharged after cooling the cave and the underground cable, A cooling system connected to the cold storage heat tank by a pipe, and comprising a cave cooling system consisting of a refrigerator that cools the high-temperature cooling water from the cold storage heat tank and returns it to the cold storage heat tank as low-temperature cooling water,
A pipe for guiding a part of the low-temperature cooling water stored in the cold storage heat tank is connected to the middle of the pipe entering the water-cooled cooler of the transformer cooling system, and the water-cooled cooler inlet and the low-temperature cooling water are connected. A thermometer for detecting the temperature of the cooling water entering the water-cooled cooler is provided in a pipe between the pipe and the portion where the coolant is introduced, and the temperature of the cooling water entering the water-cooled cooler detected by the thermometer is not less than a predetermined value. Then, the substation cooling system is characterized in that a part of the low-temperature cooling water stored in the cold storage heat tank is led to the middle of the pipe entering the water cooling type cooler of the transformer cooling system.
地下ケーブルが配設されている洞道、該洞道及び前記地下ケーブルを冷却するための低温冷却水と洞道及び前記地下ケーブルを冷却した後に排出される高温冷却水とを蓄える蓄冷熱槽、該蓄冷熱槽と配管により接続され、蓄冷熱槽からの高温冷却水を冷却し低温冷却水として該蓄冷熱槽に戻す冷凍機からなる洞道冷却系統とを備え、
前記変圧器冷却系統の水冷式冷却器へ入る配管の途中に、前記蓄冷熱槽に蓄えられている低温冷却水の一部を導く配管を接続し、該低温冷却水の一部を導く配管の途中に流量調整弁を設けると共に、前記水冷式冷却器入口と低温冷却水が導かれる部分との間の配管に前記水冷式冷却器に入る冷却水の温度を検出する温度計を設け、該温度計で検出する前記水冷式冷却器に入る冷却水の温度が所定値以上になったら、前記蓄冷熱槽に蓄えられている低温冷却水の一部を、前記変圧器冷却系統の水冷式冷却器へ入る配管の途中に導くと共に、前記温度計の検出信号を前記流量調整弁に伝達し、該流量調整弁の開度を調整して前記低温冷却水の流量を調整することを特徴とする変電所冷却システム。A transformer body including a winding and an iron core and cooled by a cooling medium, a water-cooled cooler that cools the cooling medium of the transformer body, a pipe that connects the water-cooled cooler and the transformer body, A refrigerant circulator that is arranged in the middle and circulates the cooling medium, a cooling tower that cools cooling water from the water-cooled cooler, a pipe that connects the cooling tower and the water-cooled cooler, and in the middle of the pipe A transformer cooling system which is arranged and includes a cooling water circulation pump for circulating the cooling water;
A cave in which an underground cable is disposed, a cold storage heat storage tank for storing low-temperature cooling water for cooling the cave and the underground cable, and a high-temperature cooling water discharged after cooling the cave and the underground cable, A cooling system connected to the cold storage heat tank by a pipe, and comprising a cave cooling system consisting of a refrigerator that cools the high-temperature cooling water from the cold storage heat tank and returns it to the cold storage heat tank as low-temperature cooling water,
A pipe that leads a part of the low-temperature cooling water stored in the cold storage heat tank is connected to a pipe that enters the water-cooled cooler of the transformer cooling system, and a pipe that guides a part of the low-temperature cooling water. A flow control valve is provided in the middle, and a thermometer for detecting the temperature of the cooling water entering the water-cooled cooler is provided in a pipe between the inlet of the water-cooled cooler and a portion to which the low-temperature cooling water is guided, When the temperature of the cooling water entering the water-cooled cooler detected by a meter exceeds a predetermined value, a part of the low-temperature cooling water stored in the cold-storage heat tank is transferred to the water-cooled cooler of the transformer cooling system. A substation wherein the thermometer detection signal is transmitted to the flow rate adjustment valve, and the flow rate of the low-temperature cooling water is adjusted by adjusting the opening of the flow rate adjustment valve. Cooling system.
地下ケーブルが配設されている洞道、該洞道及び前記地下ケーブルを冷却するための低温冷却水と洞道及び前記地下ケーブルを冷却した後に排出される高温冷却水とを蓄える蓄冷熱槽、該蓄冷熱槽と配管により接続され、蓄冷熱槽からの高温冷却水を冷却し低温冷却水として該蓄冷熱槽に戻す冷凍機からなる洞道冷却系統とを備え、
前記変圧器冷却系統の水冷式冷却器へ入る配管の途中に、前記蓄冷熱槽に蓄えられている低温冷却水の一部を導く配管を接続し、該低温冷却水の一部を導く配管の途中に流量調整弁を設けると共に、前記水冷式冷却器入口と低温冷却水が導かれる部分との間の配管に前記水冷式冷却器に入る冷却水の温度を検出する温度計を設け、かつ、該温度計からの信号により前記低温冷却水を汲み上げるポンプを起動したり、前記流量調整弁の開閉を指令する制御装置を有し、前記温度計で検出する前記水冷式冷却器に入る冷却水の温度が所定値以上になったら、前記制御装置からの指令により前記蓄冷熱槽に蓄えられている低温冷却水の一部を、前記変圧器冷却系統の水冷式冷却器へ入る配管の途中に導くためのポンプを起動すると共に、前記温度計の検出信号に伴う前記制御装置からの指令により前記流量調整弁の開度を調整して前記低温冷却水の流量を調整することを特徴とする変電所冷却システム。A transformer body including a winding and an iron core and cooled by a cooling medium, a water-cooled cooler that cools the cooling medium of the transformer body, a pipe that connects the water-cooled cooler and the transformer body, A refrigerant circulator that is arranged in the middle and circulates the cooling medium, a cooling tower that cools cooling water from the water-cooled cooler, a pipe that connects the cooling tower and the water-cooled cooler, and in the middle of the pipe A transformer cooling system which is arranged and includes a cooling water circulation pump for circulating the cooling water;
A cave in which an underground cable is disposed, a cold storage heat storage tank for storing low-temperature cooling water for cooling the cave and the underground cable, and a high-temperature cooling water discharged after cooling the cave and the underground cable, A cooling system connected to the cold storage heat tank by a pipe, and comprising a cave cooling system consisting of a refrigerator that cools the high-temperature cooling water from the cold storage heat tank and returns it to the cold storage heat tank as low-temperature cooling water,
A pipe that leads a part of the low-temperature cooling water stored in the cold storage heat tank is connected to a pipe that enters the water-cooled cooler of the transformer cooling system, and a pipe that guides a part of the low-temperature cooling water. A flow rate adjusting valve is provided in the middle, and a thermometer for detecting the temperature of the cooling water entering the water-cooled cooler is provided in a pipe between the water-cooled cooler inlet and the portion where the low-temperature cooling water is guided, and Cooling water entering the water-cooled cooler detected by the thermometer has a control device that activates a pump that pumps the low-temperature cooling water by a signal from the thermometer and commands the opening and closing of the flow rate adjustment valve When the temperature reaches a predetermined value or more, a part of the low-temperature cooling water stored in the cold storage heat tank is guided to the middle of the pipe entering the water cooling type cooler of the transformer cooling system according to a command from the control device. And start the pump for the thermometer Substation cooling system and adjusting the flow opening adjustment to the said cold coolant of the flow control valve in response to a command from the control device in response to detection signal.
地下ケーブルが配設されている洞道、該洞道及び前記地下ケーブルを冷却するための低温冷却水と洞道及び前記地下ケーブルを冷却した後に排出される高温冷却水とを蓄える蓄冷熱槽、該蓄冷熱槽と配管により接続され、蓄冷熱槽からの高温冷却水を冷却し低温冷却水として該蓄冷熱槽に戻す冷凍機からなる洞道冷却系統とを備え、
前記変圧器冷却系統の水冷式冷却器へ入る配管の途中で、かつ、前記水冷式循環ポンプの上流側に、前記蓄冷熱槽に蓄えられている低温冷却水の一部を導く配管を接続し、該低温冷却水の一部を導く配管の途中に流量調整弁を設けると共に、前記水冷式冷却器入口と低温冷却水が導かれる部分との間の配管に前記水冷式冷却器に入る冷却水の温度を検出する温度計を設け、かつ、該温度計からの信号により前記低温冷却水を汲み上げるポンプを起動したり、前記流量調整弁の開度を指令する制御装置を有し、更に、前記冷却塔と水冷式冷却器とを接続する配管の途中で、かつ、前記蓄冷熱槽に蓄えられている低 温冷却水の一部を導く配管の接続部より上流側に、該冷却塔からの冷却水の一部を前記蓄冷熱槽に戻す配管を接続すると共に、該配管の途中に止め弁を設け、前記温度計で検出する前記水冷式冷却器に入る冷却水の温度が所定値以上になったら、前記制御装置からの指令により前記蓄冷熱槽に蓄えられている低温冷却水の一部を、前記変圧器冷却系統の水冷式冷却器へ入る配管の途中に導くためのポンプを起動すると共に、前記温度計の検出信号に伴う前記制御装置からの指令により前記流量調整弁の開度を調整して前記低温冷却水の流量を調整し、かつ、前記変圧器冷却系統の水冷式冷却器へ入る配管の途中に前記蓄冷熱槽に蓄えられている低温冷却水の混入が開始したら、前記止め弁を開き、該混入された低温冷却水の流量と同程度の前記冷却塔からの冷却水を前記蓄冷熱槽の高温冷却水側に流入させることを特徴とする変電所冷却システム。A transformer body including a winding and an iron core and cooled by a cooling medium, a water-cooled cooler that cools the cooling medium of the transformer body, a pipe that connects the water-cooled cooler and the transformer body, A refrigerant circulator that is arranged in the middle and circulates the cooling medium, a cooling tower that cools cooling water from the water-cooled cooler, a pipe that connects the cooling tower and the water-cooled cooler, and in the middle of the pipe A transformer cooling system which is arranged and includes a cooling water circulation pump for circulating the cooling water;
A cave in which an underground cable is disposed, a cold storage heat storage tank for storing low-temperature cooling water for cooling the cave and the underground cable, and a high-temperature cooling water discharged after cooling the cave and the underground cable, A cooling system connected to the cold storage heat tank by a pipe, and comprising a cave cooling system consisting of a refrigerator that cools the high-temperature cooling water from the cold storage heat tank and returns it to the cold storage heat tank as low-temperature cooling water,
A pipe for guiding a part of the low-temperature cooling water stored in the cold storage heat tank is connected in the middle of the pipe entering the water cooling type cooler of the transformer cooling system and upstream of the water cooling type circulation pump. And a cooling water that enters the water-cooled cooler into a pipe between the inlet of the water-cooled cooler and a portion to which the low-temperature coolant is led, while providing a flow regulating valve in the middle of the pipe that guides a part of the low-temperature coolant. A control device for starting a pump for pumping up the low-temperature cooling water according to a signal from the thermometer, and commanding an opening degree of the flow rate adjustment valve, in the middle of the pipe connecting the cooling tower and the water-cooled condenser, and upstream of the connecting portion of the pipe for guiding a part of the low temperature cooling water that is stored in the cold storage heat tank, from the cooling tower A pipe for returning a part of the cooling water to the cold storage heat tank is connected and the distribution is performed. If the temperature of the cooling water entering the water-cooled cooler detected by the thermometer is equal to or higher than a predetermined value, a low temperature stored in the cold storage heat tank according to a command from the control device Starts a pump for guiding a part of the cooling water to the middle of the pipe that enters the water cooling type cooler of the transformer cooling system, and adjusts the flow rate according to a command from the control device according to a detection signal of the thermometer Adjusting the opening of the valve to adjust the flow rate of the low-temperature cooling water, and mixing low-temperature cooling water stored in the cold storage heat tank in the middle of the pipe entering the water-cooled cooler of the transformer cooling system Is started, the stop valve is opened, and the cooling water from the cooling tower having the same flow rate as the mixed low-temperature cooling water is caused to flow into the high-temperature cooling water side of the regenerator heat tank. Cooling system.
地下ケーブルが配設されている洞道、該洞道及び前記地下ケーブルを冷却するための低温冷却水と洞道及び前記地下ケーブルを冷却した後に排出される高温冷却水とを蓄える蓄冷熱槽、該蓄冷熱槽と配管により接続され、蓄冷熱槽からの高温冷却水を冷却し低温冷却水として該蓄冷熱槽に戻す冷凍機からなる洞道冷却系統とを備え、
前記変圧器本体が過負荷運転された際に、前記蓄冷熱槽に蓄えられている低温冷却水の一部を、前記変圧器冷却系統の水例式冷却器へ入る配管の途中に導く手段を前記各々の変圧器冷却系統に有することを特徴とする変電所冷却システム。A plurality of transformer bodies including windings and iron cores that are cooled by a cooling medium, a water-cooled cooler that is provided in each of the plurality of transformer bodies and that cools the cooling medium of the transformer body, and the water-cooled cooler And a pipe connecting the transformer body, a refrigerant circulator disposed in the middle of the pipe and circulating the cooling medium, a cooling tower for cooling cooling water from each of the water-cooled coolers, and the cooling tower; A pipe connecting each of the water-cooled coolers, a transformer cooling system that is arranged in the middle of the pipe and includes a cooling water circulation pump that circulates the cooling water;
A cave in which an underground cable is disposed, a cold storage heat storage tank for storing low-temperature cooling water for cooling the cave and the underground cable, and a high-temperature cooling water discharged after cooling the cave and the underground cable, A cooling system connected to the cold storage heat tank by a pipe, and comprising a cave cooling system consisting of a refrigerator that cools the high-temperature cooling water from the cold storage heat tank and returns it to the cold storage heat tank as low-temperature cooling water,
Means for guiding a part of the low-temperature cooling water stored in the cold storage heat tank to the middle of the pipe entering the water cooler of the transformer cooling system when the transformer body is overloaded. A substation cooling system having each of the transformer cooling systems.
地下ケーブルが配設されている洞道、該洞道及び前記地下ケーブルを冷却するための低温冷却水と洞道及び前記地下ケーブルを冷却した後に排出される高温冷却水とを蓄える蓄冷熱槽、該蓄冷熱槽と配管により接続され、蓄冷熱槽からの高温冷却水を冷却し低温冷却水として該蓄冷熱槽に戻す冷凍機からなる洞道冷却系統とを備え、
前記変圧器冷却系統の各々の水冷式冷却器へ入る配管の途中に、前記蓄冷熱槽に蓄えられている低温冷却水の一部を分岐して導く配管を接続すると共に、前記水冷式冷却器入口と低温冷却水が導かれる部分との間の各々の配管に前記水冷式冷却器に入る冷却水の温度を検出する温度計を設け、該温度計で検出する前記水冷式冷却器に入る冷却水の温度が所定値以上になったら、前記蓄冷熱槽に蓄えられている低温冷却水の一部を、前記冷却水の温度が所定値以上になった前記変圧器冷却系統の水冷式冷却器へ入る配管の途中に導くことを特徴とする変電所冷却システム。A plurality of transformer bodies including windings and iron cores that are cooled by a cooling medium, a water-cooled cooler that is provided in each of the plurality of transformer bodies and that cools the cooling medium of the transformer body, and the water-cooled cooler And a pipe connecting the transformer body, a refrigerant circulator disposed in the middle of the pipe and circulating the cooling medium, a cooling tower for cooling cooling water from each of the water-cooled coolers, and the cooling tower; A pipe connecting each of the water-cooled coolers, a transformer cooling system that is arranged in the middle of the pipe and includes a cooling water circulation pump that circulates the cooling water;
A cave in which an underground cable is disposed, a cold storage heat storage tank for storing low-temperature cooling water for cooling the cave and the underground cable, and a high-temperature cooling water discharged after cooling the cave and the underground cable, A cooling system connected to the cold storage heat tank by a pipe, and comprising a cave cooling system consisting of a refrigerator that cools the high-temperature cooling water from the cold storage heat tank and returns it to the cold storage heat tank as low-temperature cooling water,
A pipe for branching and guiding a part of the low-temperature cooling water stored in the cold storage heat tank is connected to the water cooling type cooler in each of the transformer cooling systems, and the water cooling type cooler A thermometer for detecting the temperature of the cooling water entering the water-cooled cooler is provided in each pipe between the inlet and the portion where the low-temperature cooling water is guided, and the cooling entering the water-cooled cooler detected by the thermometer is provided. When the temperature of the water becomes a predetermined value or more, a part of the low-temperature cooling water stored in the cold storage heat tank is replaced with a water-cooled cooler of the transformer cooling system in which the temperature of the cooling water becomes a predetermined value or more. A substation cooling system, which is guided in the middle of a pipe entering the station.
地下ケーブルが配設されている洞道、該洞道及び前記地下ケーブルを冷却するための低温冷却水と洞道及び前記地下ケーブルを冷却した後に排出される高温冷却水とを蓄える蓄冷熱槽、該蓄冷熱槽と配管により接続され、蓄冷熱槽からの高温冷却水を冷却し低温冷却水として該蓄冷熱槽に戻す冷凍機からなる洞道冷却系統とを備え、
前記変圧器冷却系統の各々の水冷式冷却器へ入る配管の途中に、前記蓄冷熱槽に蓄えられている低温冷却水の一部を分岐して導く配管を接続し、該低温冷却水の一部を導く分岐する前の配管の途中に流量調整弁を設けると共に、前記水冷式冷却器入口と低温冷却水が導かれる部分との間の各々の配管に前記水冷式冷却器に入る冷却水の温度を検出する温度計を設け、該温度計で検出する前記水冷式冷却器に入る冷却水の温度が所定値以上になったら、前記蓄冷熱槽に蓄えられている低温冷却水の一部を、前記冷却水の温度が所定値以上になった前記変圧器冷却系統の水冷式冷却器へ入る配管の途中に導くと共に、前記温度計の検出信号を前記流量調整弁に伝達し、該流量調整弁の開度を調整して前記低温冷却水の流量を調整することを特徴とする変電所冷却システム。A plurality of transformer bodies including windings and iron cores that are cooled by a cooling medium, a water-cooled cooler that is provided in each of the plurality of transformer bodies and that cools the cooling medium of the transformer body, and the water-cooled cooler And a pipe connecting the transformer body, a refrigerant circulator disposed in the middle of the pipe and circulating the cooling medium, a cooling tower for cooling cooling water from each of the water-cooled coolers, and the cooling tower; A pipe connecting each of the water-cooled coolers, a transformer cooling system that is arranged in the middle of the pipe and includes a cooling water circulation pump that circulates the cooling water;
A cave in which an underground cable is disposed, a cold storage heat storage tank for storing low-temperature cooling water for cooling the cave and the underground cable, and a high-temperature cooling water discharged after cooling the cave and the underground cable, A cooling system connected to the cold storage heat tank by a pipe, and comprising a cave cooling system consisting of a refrigerator that cools the high-temperature cooling water from the cold storage heat tank and returns it to the cold storage heat tank as low-temperature cooling water,
A pipe for branching and guiding a part of the low-temperature cooling water stored in the cold-storage heat tank is connected to the middle of the pipe entering each water-cooled cooler of the transformer cooling system. A flow rate adjusting valve is provided in the middle of the pipe before branching, and the cooling water entering the water-cooled cooler is connected to each pipe between the water-cooled cooler inlet and the portion to which the low-temperature cooling water is guided. A thermometer for detecting the temperature is provided, and when the temperature of the cooling water entering the water-cooled cooler detected by the thermometer exceeds a predetermined value, a part of the low-temperature cooling water stored in the cold storage heat tank is removed. The temperature of the cooling water is not less than a predetermined value, and is guided to the middle of the pipe that enters the water cooling type cooler of the transformer cooling system, and the detection signal of the thermometer is transmitted to the flow rate adjustment valve, and the flow rate adjustment is performed. Adjusting the flow rate of the low-temperature cooling water by adjusting the opening of the valve; Substation cooling system that.
地下ケーブルが配設されている洞道、該洞道及び前記地下ケーブルを冷却するための低温冷却水と洞道及び前記地下ケーブルを冷却した後に排出される高温冷却水とを蓄える蓄冷熱槽、該蓄冷熱槽と配管により接続され、蓄冷熱槽からの高温冷却水を冷却し低温冷却水として該蓄冷熱槽に戻す冷凍機からなる洞道冷却系統とを備え、
前記変圧器冷却系統の各々の水冷式冷却器へ入る配管の途中に、前記蓄冷熱槽に蓄えられている低温冷却水の一部を分岐して導く配管を接続し、該低温冷却水の一部を導く分岐する前の配管の途中に流量調整弁を設けると共に、前記水冷式冷却器入口と低温冷却水が導かれる部分との間の各々の配管に前記水冷式冷却器に入る冷却水の温度を検出する温度計を設け、かつ、該温度計からの信号により前記低温冷却水を汲み上げるポンプを起動したり、前記流量調整弁の開閉を指令する制御装置を有し、前記温度計で検出する前記水冷式冷却器に入る冷却水の温度が所定値以上になったら、前記制御装置からの指令により前記蓄冷熱槽に蓄えられている低温冷却水の一部を、前記冷却水の温度が所定値以上になった前記変圧器冷却系統の水冷式冷却器へ入る配管の途中に導くためのポンプを起動すると共に、前記温度計の検出信号に伴う前記制御装置からの指令により前記流量調整弁の開度を調整して前記低温冷却水の流量を調整することを特徴とする変電所冷却システム。A plurality of transformer bodies including windings and iron cores that are cooled by a cooling medium, a water-cooled cooler that is provided in each of the plurality of transformer bodies and that cools the cooling medium of the transformer body, and the water-cooled cooler And a pipe connecting the transformer body, a refrigerant circulator disposed in the middle of the pipe and circulating the cooling medium, a cooling tower for cooling cooling water from each of the water-cooled coolers, and the cooling tower; A pipe connecting each of the water-cooled coolers, a transformer cooling system that is arranged in the middle of the pipe and includes a cooling water circulation pump that circulates the cooling water;
A cave in which an underground cable is disposed, a cold storage heat storage tank for storing low-temperature cooling water for cooling the cave and the underground cable, and a high-temperature cooling water discharged after cooling the cave and the underground cable, A cooling system connected to the cold storage heat tank by a pipe, and comprising a cave cooling system consisting of a refrigerator that cools the high-temperature cooling water from the cold storage heat tank and returns it to the cold storage heat tank as low-temperature cooling water,
A pipe for branching and guiding a part of the low-temperature cooling water stored in the cold-storage heat tank is connected to the middle of the pipe entering each water-cooled cooler of the transformer cooling system. A flow rate adjusting valve is provided in the middle of the pipe before branching, and the cooling water entering the water-cooled cooler is connected to each pipe between the water-cooled cooler inlet and the portion to which the low-temperature coolant is led. A thermometer for detecting the temperature is provided, and a control device for starting a pump for pumping up the low-temperature cooling water by a signal from the thermometer or instructing opening / closing of the flow rate adjusting valve is detected by the thermometer. When the temperature of the cooling water entering the water-cooled cooler reaches or exceeds a predetermined value, a part of the low-temperature cooling water stored in the cold storage heat tank is instructed by the command from the control device. Water-cooled type of the transformer cooling system that has exceeded a predetermined value The pump for guiding the pipe into the rejector is started, and the flow rate of the low-temperature cooling water is adjusted by adjusting the opening of the flow rate adjusting valve according to a command from the control device accompanying the detection signal of the thermometer. Substation cooling system characterized by adjusting.
地下ケーブルが配設されている洞道、該洞道及び前記地下ケーブルを冷却するための低温冷却水と洞道及び前記地下ケーブルを冷却した後に排出される高温冷却水とを蓄える蓄冷熱槽、該蓄冷熱槽と配管により接続され、蓄冷熱槽からの高温冷却水を冷却し低温冷却水として該蓄冷熱槽に戻す冷凍機からなる洞道冷却系統とを備え、
前記変圧器冷却系統の各々の水冷式冷却器へ入る配管の途中で、かつ、前記水冷式循環ポンプより前記水冷式冷 却器側に、前記蓄冷熱槽に蓄えられている低温冷却水の一部を分岐して導く配管を接続し、該低温冷却水の一部を導く分岐する前の配管の途中に流量調整弁を設けると共に、前記水冷式冷却器入口と低温冷却水が導かれる部分との間の各々の配管に前記水冷式冷却器に入る冷却水の温度を検出する温度計を設け、かつ、該温度計からの信号により前記低温冷却水を汲み上げるポンプを起動したり、前記流量調整弁の開度を指令する制御装置を有し、更に、前記冷却塔と水冷式冷却器とを接続する配管の途中で、かつ、前記冷却水循環ポンプより前記冷却塔 側に、該冷却塔からの冷却水の一部を前記蓄冷熱槽に戻す配管を接続すると共に、該配管の途中に止め弁を設け、前記温度計で検出する前記水冷式冷却器に入る冷却水の温度が所定値以上になったら、前記制御装置からの指令により前記蓄冷熱槽に蓄えられている低温冷却水の一部を、前記冷却水の温度が所定値以上になった前記変圧器冷却系統の水冷式冷却器へ入る配管の途中に導くためのポンプを起動すると共に、前記温度計の検出信号に伴う前記制御装置からの指令により前記流量調整弁の開度を調整して前記低温冷却水の流量を調整し、かつ、前記変圧器冷却系統の水冷式冷却器へ入る配管の途中に前記蓄冷熱槽に蓄えられている低温冷却水の混入が開始したら、前記止め弁を開き、該混入された低温冷却水の流量と同程度の前記冷却塔からの冷却水を前記蓄冷熱槽の高温冷却水側に流入させることを特徴とする変電所冷却システム。A plurality of transformer bodies including windings and iron cores that are cooled by a cooling medium, a water-cooled cooler that is provided in each of the plurality of transformer bodies and that cools the cooling medium of the transformer body, and the water-cooled cooler And a pipe connecting the transformer body, a refrigerant circulator disposed in the middle of the pipe and circulating the cooling medium, a cooling tower for cooling cooling water from each of the water-cooled coolers, and the cooling tower; A pipe connecting each of the water-cooled coolers, a transformer cooling system that is arranged in the middle of the pipe and includes a cooling water circulation pump that circulates the cooling water;
A cave in which an underground cable is disposed, a cold storage heat storage tank for storing low-temperature cooling water for cooling the cave and the underground cable, and a high-temperature cooling water discharged after cooling the cave and the underground cable, A cooling system connected to the cold storage heat tank by a pipe, and comprising a cave cooling system consisting of a refrigerator that cools the high-temperature cooling water from the cold storage heat tank and returns it to the cold storage heat tank as low-temperature cooling water,
In the middle of the pipe where the entering each of the water-cooled cooler transformer cooling system and the water-cooled cold 却器side of the water-cooled circulation pump, one low temperature cooling water that is stored in the cold storage heat bath A pipe that branches and leads a pipe, and a flow control valve is provided in the middle of the pipe before branching to guide a part of the low-temperature cooling water, and the water-cooled cooler inlet and a part to which the low-temperature cooling water is led A thermometer for detecting the temperature of the cooling water entering the water-cooled cooler is provided in each of the pipes, and a pump for pumping up the low-temperature cooling water is started by a signal from the thermometer, or the flow rate adjustment A control device for commanding the opening degree of the valve , and in the middle of the pipe connecting the cooling tower and the water-cooled cooler, and from the cooling water circulation pump to the cooling tower side , from the cooling tower When connecting a pipe that returns part of the cooling water to the cold storage heat tank When the temperature of the cooling water entering the water-cooled cooler detected by the thermometer exceeds a predetermined value, a stop valve is provided in the middle of the pipe and stored in the regenerative heat tank according to a command from the control device. And starting a pump for guiding a part of the low-temperature cooling water that is in the middle of a pipe that enters the water-cooled cooler of the transformer cooling system in which the temperature of the cooling water is equal to or higher than a predetermined value. The flow rate of the low-temperature cooling water is adjusted by adjusting the opening of the flow rate adjusting valve according to a command from the control device according to the detection signal of the meter, and the piping entering the water-cooled cooler of the transformer cooling system When mixing of the low-temperature cooling water stored in the cold-storage heat tank is started halfway, the stop valve is opened, and the cooling water from the cooling tower having the same flow rate as the mixed low-temperature cooling water is supplied to the cold-storage heat. It is characterized by flowing into the high-temperature cooling water side of the tank Substation cooling system that.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP1996/001870 WO1998001871A1 (en) | 1996-07-05 | 1996-07-05 | Cooling system for substation |
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| Publication Number | Publication Date |
|---|---|
| JP3619522B2 true JP3619522B2 (en) | 2005-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP50502098A Expired - Fee Related JP3619522B2 (en) | 1996-07-05 | 1996-07-05 | Substation cooling system |
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|---|---|
| JP (1) | JP3619522B2 (en) |
| TW (1) | TW377527B (en) |
| WO (1) | WO1998001871A1 (en) |
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|---|---|---|---|---|
| JPH03129711A (en) * | 1989-09-27 | 1991-06-03 | Toshiba Corp | Gas-insulated transformer |
| JPH04274306A (en) * | 1991-03-01 | 1992-09-30 | Takaoka Electric Mfg Co Ltd | Gas insulated electric apparatus |
-
1996
- 1996-07-05 WO PCT/JP1996/001870 patent/WO1998001871A1/en active Application Filing
- 1996-07-05 JP JP50502098A patent/JP3619522B2/en not_active Expired - Fee Related
-
1997
- 1997-01-31 TW TW086101124A patent/TW377527B/en active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568761A (en) * | 2010-12-23 | 2012-07-11 | 上海市电力公司 | Method for cooling underground substation transformer |
| CN105529153A (en) * | 2016-02-25 | 2016-04-27 | 王威 | Plug-piece regulating transformer |
| CN105632711A (en) * | 2016-03-07 | 2016-06-01 | 饶丽华 | Special voltage conversion device |
| CN113067255A (en) * | 2021-03-09 | 2021-07-02 | 安徽中意电气成套设备有限公司 | Intelligent monitoring type high-low voltage power distribution cabinet and monitoring method thereof |
| CN113067255B (en) * | 2021-03-09 | 2022-09-27 | 安徽中意电气成套设备有限公司 | Intelligent monitoring type high-low voltage power distribution cabinet and monitoring method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| TW377527B (en) | 1999-12-21 |
| WO1998001871A1 (en) | 1998-01-15 |
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