JPH08182131A - Accident point spotting device - Google Patents

Accident point spotting device

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Publication number
JPH08182131A
JPH08182131A JP6322247A JP32224794A JPH08182131A JP H08182131 A JPH08182131 A JP H08182131A JP 6322247 A JP6322247 A JP 6322247A JP 32224794 A JP32224794 A JP 32224794A JP H08182131 A JPH08182131 A JP H08182131A
Authority
JP
Japan
Prior art keywords
ground fault
circuit
accident
ground
monitoring means
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP6322247A
Other languages
Japanese (ja)
Other versions
JP3259556B2 (en
Inventor
Naohiro Kaneman
直弘 金万
Hitoshi Nakai
仁志 中井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nissin Electric Co Ltd
Original Assignee
Nissin Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nissin Electric Co Ltd filed Critical Nissin Electric Co Ltd
Priority to JP32224794A priority Critical patent/JP3259556B2/en
Publication of JPH08182131A publication Critical patent/JPH08182131A/en
Application granted granted Critical
Publication of JP3259556B2 publication Critical patent/JP3259556B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PURPOSE: To provide a highly reliable accident point spotting device by preventing the erroneous spotting of the device when an accident happens. CONSTITUTION: A ground-fault over-voltage monitoring means 11 detects a ground-fault over-voltage. An AC under-voltage monitoring means 12 detects a voltage drop across a bus caused by a ground-fault. A bus-phase voltage monitoring means 13 detects the occurrence of a power failure caused by the tripping of a circuit breaker. A ground-fault detection locking means 10 discriminates whether an accident happens inside or outside of the container of insulating equipment by logically combining the signals from the means 11, 12, and 13 by means of circuits 14-19 and further discriminates whether or not the rise of gas pressure in the container is caused by the tripping of the circuit breaker. In case the possibility of erroneous spotting of a ground-fault exists as a result of the above-mentioned discrimination, the locking means 13 inhibits the ground-fault detecting operation of a ground-fault detecting arithmetic means by outputting a ground-fault detection locking signal to the arithmetic means.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、受変電設備などで用い
られているガス絶縁機器の事故発生箇所を速やかに発見
し、機器の早期復旧に寄与するための事故点標定装置に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an accident point locating device for promptly finding a location of an accident in a gas-insulated equipment used in a power receiving and transforming facility and contributing to early restoration of the equipment. .

【０００２】[0002]

【従来の技術】ガス絶縁機器においては、ガス容器内で
地絡事故又は短絡事故が発生したとき、アークによりガ
ス容器内のガス圧力が上昇する。この圧力上昇を圧力セ
ンサにより検出することにより、ガス容器内で地絡事故
又は短絡事故が発生したことを検出し、事故を標定する
事故点標定装置がある。2. Description of the Related Art In gas-insulated equipment, when a ground fault or a short-circuit accident occurs in the gas container, the gas pressure in the gas container rises due to the arc. There is an accident point locating device that detects the occurrence of a ground fault accident or a short circuit accident in a gas container by detecting this pressure increase with a pressure sensor, and locates the accident.

【０００３】短絡事故が発生したとき、短絡電流のアー
クによるガス圧力上昇は大きい。事故点標定装置は、こ
のガス圧力の大きな上昇値を検出し短絡検出演算を行う
ことにより、その箇所に短絡事故が発生したと標定す
る。同時に、地絡検出動作をロックし、短絡事故の検出
を優先させる。一方、地絡事故は短絡事故に比べて、ア
ーク電流が小さくガス圧力の上昇が微小である。このた
め、地絡事故を検出するには、地絡事故時に母線に発生
する地絡過電圧を検出し、これによりガス圧力の上昇の
検出を高感度で行うようにして地絡検出演算を開始す
る。そして、ガス圧力の上昇のあった箇所を地絡事故点
と標定する。When a short circuit accident occurs, the gas pressure rise due to the arc of the short circuit current is large. The accident point locating device detects a large increase in gas pressure and performs a short circuit detection calculation to locate a short circuit accident at that location. At the same time, the ground fault detection operation is locked, and the detection of a short circuit accident is prioritized. On the other hand, in the case of a ground fault, the arc current is small and the rise in gas pressure is small compared to a short-circuit accident. Therefore, in order to detect a ground fault accident, the ground fault overvoltage generated on the bus at the time of the ground fault accident is detected, and thereby the rise of the gas pressure is detected with high sensitivity, and the ground fault detection calculation is started. . Then, the place where the gas pressure rises is located as the ground fault accident point.

【０００４】[0004]

【発明が解決しようとする課題】上記従来の事故点標定
装置においては、事故の発生箇所又は事故の種類によっ
ては、短絡事故を地絡事故と誤標定し、さらに発生箇所
を誤標定する可能性がある。これについて図３を用いて
説明する。図は、事故点標定装置が適用されるガス絶縁
開閉装置（以下「ＧＩＳ」という。）を示している。図
３の送電線３４上で１線地絡事故が発生し、それが２線
地絡事故に移行したとする。事故点標定装置は、まず、
１線地絡事故により、母線３５に地絡過電圧が発生する
ので、地絡過電圧を検出して地絡検出モードを起動す
る。In the above-mentioned conventional accident point locating device, there is a possibility that a short circuit accident may be erroneously determined to be a ground fault and the occurrence point may be erroneously determined depending on the location or type of the accident. There is. This will be described with reference to FIG. The figure shows a gas-insulated switchgear (hereinafter referred to as "GIS") to which an accident location device is applied. It is assumed that a one-line ground fault has occurred on the power transmission line 34 in FIG. 3 and that the two-line ground fault has occurred. First, the accident point locator
Since the ground fault overvoltage is generated in the bus 35 due to the one-wire ground fault accident, the ground fault overvoltage is detected and the ground fault detection mode is activated.

【０００５】その後、２線地絡事故に移行すると、事故
電流は短絡電流相当の大電流が流れることとなる。しか
しながら、上記の事故はＧＩＳ容器外で発生しているた
め、ＧＩＳ容器３１，３２，３３内でのガス圧力上昇は
発生しない。したがって、前記の地絡検出モードに対す
るロックが掛からないので、１線地絡事故時に起動され
た高感度でのガス圧力監視が継続する。After that, when a two-wire ground fault occurs, a large current equivalent to a short-circuit current flows as the fault current. However, since the above-mentioned accident occurs outside the GIS container, the gas pressure does not rise inside the GIS containers 31, 32, and 33. Therefore, since the ground fault detection mode is not locked, the gas pressure monitoring with high sensitivity started at the time of the one-line ground fault continues.

【０００６】この状態で、保護装置の動作によりガス遮
断器３８が事故電流を遮断する。この事故電流は短絡電
流相当の大電流であるので、ガス遮断器３８の電流遮断
によるガス遮断器容器３２内のガス圧力上昇は、短絡事
故時のガス圧力上昇より小さいが地絡事故時のガス圧力
上昇よりは大きくなる。したがって、ガス圧力の監視を
継続していた事故点標定装置は、ガス遮断器容器３８内
で地絡事故が発生したと誤標定する可能性がある。In this state, the gas circuit breaker 38 cuts off the accident current due to the operation of the protective device. Since this accident current is a large current equivalent to the short circuit current, the gas pressure rise in the gas circuit breaker container 32 due to the current interruption of the gas circuit breaker 38 is smaller than the gas pressure rise at the time of the short circuit accident, but the gas at the time of the ground fault accident. Greater than pressure increase. Therefore, the accident point locator, which has continued to monitor the gas pressure, may erroneously locate a ground fault in the gas circuit breaker container 38.

【０００７】以上説明したように、従来の事故点標定装
置においては、送電線事故時に誤標定をする可能性があ
る。本発明は、上記問題点を解決するためになされたも
ので、事故点標定装置における事故発生時の誤標定を防
止することにより、事故点標定装置を高信頼なものとす
ることを目的とするものである。As described above, in the conventional accident point locating device, there is a possibility of erroneous locating at the time of a power line accident. The present invention has been made to solve the above problems, and an object of the present invention is to make an accident point locating device highly reliable by preventing erroneous locating when an accident occurs in the accident point locating device. It is a thing.

【０００８】[0008]

【課題を解決するための手段】本発明は、上記目的を達
成するため、ガス絶縁機器容器内のガス圧力と母線電圧
とを入力信号として、地絡検出演算手段と短絡検出演算
手段とを用いて地絡事故又は短絡事故を検出する事故点
標定装置において、地絡事故発生時に母線に発生する地
絡過電圧を検出する地絡過電圧監視手段と、母線におけ
る交流不足電圧を検出する交流不足電圧監視手段と、母
線の相電圧が０Ｖであることを検出する母線相電圧監視
手段を設ける。さらに、これら地絡過電圧監視手段と交
流不足電圧監視手段と母線相電圧監視手段からの信号を
論理的に組合せ、前記地絡検出演算手段に対して動作を
禁止する信号を出力する地絡ロック手段を設ける。In order to achieve the above-mentioned object, the present invention uses a ground fault detection calculation means and a short circuit detection calculation means with gas pressure and bus voltage in a gas-insulated equipment container as input signals. In an accident point locator that detects a ground fault or a short-circuit accident, a ground fault overvoltage monitor that detects a ground fault overvoltage that occurs on the bus when a ground fault occurs, and an AC undervoltage monitor that detects an AC undervoltage on the bus Means and a bus phase voltage monitoring means for detecting that the bus phase voltage is 0V. Further, ground fault lock means for logically combining the signals from the ground fault overvoltage monitoring means, the AC undervoltage monitoring means, and the bus phase voltage monitoring means, and outputting a signal for inhibiting the operation to the ground fault detecting / calculating means. To provide.

【０００９】[0009]

【作用】地絡過電圧監視手段は、地絡事故の発生により
母線に発生する地絡過電圧を検出する。交流不足電圧監
視手段は、短絡事故又は２線地絡事故による母線電圧の
低下を検出する。母線相電圧監視手段は、遮断器のトリ
ップにより停電したことを検出する。The ground fault overvoltage monitoring means detects the ground fault overvoltage generated on the bus bar due to the occurrence of the ground fault accident. The AC undervoltage monitoring unit detects a decrease in bus voltage due to a short circuit accident or a two-wire ground fault accident. The bus phase voltage monitoring means detects a power failure due to a trip of the circuit breaker.

【００１０】地絡ロック手段は、これらの信号を論理的
に組合せることにより、容器内のガス圧力上昇が、遮断
器のトリップにより発生したものであるか否かを判別す
る。この判別の結果、地絡ロック手段は、地絡事故を誤
標定する可能性がある場合に、地絡検出演算手段に対し
て地絡検出ロック信号を出力し、地絡検出動作を禁止す
る。The ground fault lock means logically combines these signals to determine whether or not the increase in gas pressure in the container is caused by the trip of the circuit breaker. As a result of this determination, the ground fault lock means outputs a ground fault detection lock signal to the ground fault detection calculation means and prohibits the ground fault detection operation when there is a possibility of mislocating the ground fault accident.

【００１１】[0011]

【実施例】本発明をＧＩＳに適用した実施例について図
面を用いて説明する。図３は、ＧＩＳの構成図である。
ＧＩＳは、ケーブルヘッド容器３１、ガス遮断器容器３
２、母線容器３３を有し、送電線３４と母線３５の間を
ケーブルヘッド３６、断路器３７、ガス遮断器３８によ
り接続している。また、各容器３１，３２，３３のガス
圧力を計測する圧力センサ３９，４０，４１がガス配管
中に設けられる。さらに、母線３５には、母線線間電
圧、母線相電圧、地絡過電圧を計測するためのＧＰＴ４
２が接続される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to GIS will be described with reference to the drawings. FIG. 3 is a block diagram of the GIS.
GIS includes a cable head container 31, a gas circuit breaker container 3
2. The busbar container 33 is provided, and the transmission line 34 and the busbar 35 are connected by a cable head 36, a disconnector 37, and a gas circuit breaker 38. Further, pressure sensors 39, 40, 41 for measuring the gas pressure of the containers 31, 32, 33 are provided in the gas pipe. Further, the bus bar 35 has a GPT4 for measuring a voltage between bus lines, a bus phase voltage, and a ground fault overvoltage.
2 are connected.

【００１２】図２は、事故点標定装置２０の構成を示す
ブロック図である。事故点標定装置２０は、圧力センサ
３９，４０，４１及びＧＰＴ４２からの信号を入力とし
て、短絡検出演算手段２１と地絡検出演算手段２２によ
り、それぞれ短絡事故及び地絡事故の発生の有無及びそ
の事故がどの容器内で発生したかを標定する。FIG. 2 is a block diagram showing the configuration of the accident point locating device 20. The accident point locating device 20 receives signals from the pressure sensors 39, 40, 41 and the GPT 42 as input, and uses the short-circuit detection calculation means 21 and the ground-fault detection calculation means 22 to determine whether or not a short-circuit accident and a ground-fault accident occur, respectively. Determine in which container the accident occurred.

【００１３】短絡検出演算手段２１と地絡検出演算手段
２２は公知のものを使用する。したがって、ここでの説
明は省略する。また、事故点標定装置２０には、短絡事
故検出を優先とするために、地絡検出演算手段２２の動
作を禁止する地絡ロック手段１０が設けられる。この地
絡ロック手段１０については、後で説明する。短絡検出
演算手段２１と地絡検出演算手段２２の演算結果は、表
示手段２４により表示される。なお、２５，２６はイン
ターフェースである。Well-known short-circuit detection calculation means 21 and ground fault detection calculation means 22 are used. Therefore, the description here is omitted. Further, the accident point locating device 20 is provided with the ground fault lock unit 10 that prohibits the operation of the ground fault detection calculation unit 22 in order to prioritize the detection of the short circuit accident. The ground fault lock means 10 will be described later. The calculation results of the short circuit detection calculation means 21 and the ground fault detection calculation means 22 are displayed by the display means 24. Incidentally, 25 and 26 are interfaces.

【００１４】図１は、地絡検出ロック手段１０の構成を
示す回路図である。図において、１１は、ＧＰＴ４２の
３次巻線から出力される地絡過電圧を監視する地絡過電
圧監視手段であり、地絡過電圧が所定値を超えたとき出
力をオンする。１２は、ＧＰＴ４２の２次巻線から出力
される母線３５の線間電圧ＶAB，ＶBC，ＶCAを監視する
交流不足電圧監視手段であり、各線間電圧ＶAB，ＶBC，
ＶCAが規定値より低下すると出力をオンする。交流不足
電圧監視手段１２の出力は線間電圧ＶAB，ＶBC，ＶCAご
とに第１のＯＲ回路１４に入力される。FIG. 1 is a circuit diagram showing the structure of the ground fault detection lock means 10. In the figure, 11 is a ground fault overvoltage monitoring means for monitoring the ground fault overvoltage output from the third winding of the GPT 42, and turns on the output when the ground fault overvoltage exceeds a predetermined value. Reference numeral 12 is an AC undervoltage monitoring means for monitoring the line voltages V AB , V BC , V CA of the bus 35 output from the secondary winding of the GPT 42, and the line voltages V AB , V BC ,
The output is turned on when V CA falls below the specified value. The output of the AC undervoltage monitoring means 12 is input to the first OR circuit 14 for each of the line voltages V AB , V BC and V CA.

【００１５】１３は、ＧＰＴ４２の２次巻線から出力さ
れる母線３５の相電圧ＶA ，ＶB ，ＶC を監視する母線
相電圧監視手段であり、各相電圧ＶA ，ＶB ，ＶC が停
電などにより０Ｖとなると出力をオンする。なお、母線
相３５の相電圧は、地絡事故又は短絡事故が発生した場
合は、アーク電圧分が残るため、０Ｖとはならない。母
線相電圧監視手段１３の出力は各相電圧ＶA ，ＶB ，Ｖ
C ごとに第２のＡＮＤ回路１５に入力される。Reference numeral 13 is a bus phase voltage monitoring means for monitoring the phase voltages V A , V B , V C of the bus 35 output from the secondary winding of the GPT 42, and the phase voltages V A , V B , V are provided. The output turns on when C becomes 0V due to a power failure. It should be noted that the phase voltage of the bus phase 35 does not become 0 V when the ground fault or the short-circuit fault occurs because the arc voltage remains. The output of the bus phase voltage monitoring means 13 is each phase voltage V A , V B , V
Each C is input to the second AND circuit 15.

【００１６】第１のＯＲ回路１４の出力と地絡過電圧監
視手段１１の出力が第１のＡＮＤ回路１６に入力され
る。地絡過電圧監視手段１１と第１のＯＲ回路１４と第
２のＡＮＤ回路１５の出力が第３のＡＮＤ回路１７に入
力される。ただし、地絡過電圧監視手段１１と第２のＡ
ＮＤ回路１５の出力は否定端子に入力される。The output of the first OR circuit 14 and the output of the ground fault overvoltage monitoring means 11 are input to the first AND circuit 16. The outputs of the ground fault overvoltage monitoring means 11, the first OR circuit 14, and the second AND circuit 15 are input to the third AND circuit 17. However, the ground fault overvoltage monitoring means 11 and the second A
The output of the ND circuit 15 is input to the negative terminal.

【００１７】第１のＡＮＤ回路１６と第３のＡＮＤ回路
１７の出力が第２のＯＲ回路１８に入力され、その出力
が延長タイマ１９に入力される。延長タイマ１９の出力
信号は地絡検出ロック信号として図２の地絡検出演算手
段２２の最終出力段に入力され、出力信号がオンされた
とき、地絡検出演算手段２２の地絡検出動作動作をロッ
クする。The outputs of the first AND circuit 16 and the third AND circuit 17 are input to the second OR circuit 18, and the outputs thereof are input to the extension timer 19. The output signal of the extension timer 19 is input to the final output stage of the ground fault detection calculation means 22 of FIG. 2 as a ground fault detection lock signal, and when the output signal is turned on, the ground fault detection operation operation of the ground fault detection calculation means 22. Lock.

【００１８】次に、図４〜図１０を用いて、図１の回路
の動作を説明する。なお、図４〜図１０において、信号
波形の前に表示した番号は、図１における同一番号の回
路要素の出力を示している。例えば、図４〜図１０で番
号１１を付した信号波形は、図１の地絡過電圧監視手段
１１の出力である。図４は、送電線３４で１線地絡事故
が発生した場合の信号波形を示している。１線地絡事故
が発生したとき、母線３５に地絡過電圧が発生するの
で、地絡過電圧監視手段１１の出力がオンとなる。しか
し、母線電圧の低下はないので、交流不足電圧監視手段
１２の出力のオフにより第１のＯＲ回路１４の出力はオ
フである。このため、第１のＡＮＤ回路１６の出力はオ
ンしない。Next, the operation of the circuit shown in FIG. 1 will be described with reference to FIGS. 4 to 10, the numbers displayed before the signal waveforms indicate the outputs of the circuit elements having the same numbers in FIG. For example, the signal waveforms denoted by reference numeral 11 in FIGS. 4 to 10 are the outputs of the ground fault overvoltage monitoring means 11 in FIG. FIG. 4 shows a signal waveform when a one-line ground fault occurs on the power transmission line 34. When a one-wire ground fault occurs, a ground fault overvoltage is generated on the bus bar 35, so that the output of the ground fault overvoltage monitoring means 11 is turned on. However, since there is no drop in the bus voltage, the output of the first OR circuit 14 is off because the output of the AC undervoltage monitoring means 12 is off. Therefore, the output of the first AND circuit 16 does not turn on.

【００１９】また、地絡過電圧監視手段１１が動作して
いるため、第３のＡＮＤ回路１７の出力もオンしない。
そこで、第２のＯＲ回路１８及び延長タイマ１９の出力
はオフであり、地絡検出ロック信号は出力されない。し
たがって、地絡検出演算手段２２はガス圧力監視を継続
する。この状態で、保護装置の動作によりガス遮断器３
８がトリップしても、地絡電流の遮断によるガス遮断器
容器３８の圧力上昇は、地絡事故が発生したときの圧力
上昇よりも微小である。また、他の容器３１，３３にお
いても圧力上昇が起こらない。したがって、地絡検出モ
ードをロックしなくとも、地絡検出演算手段２２はガス
遮断器容器３２あるいは他の容器３１，３３内で地絡事
故が発生したとは判定しない。Since the ground fault overvoltage monitoring means 11 is operating, the output of the third AND circuit 17 does not turn on.
Therefore, the outputs of the second OR circuit 18 and the extension timer 19 are off, and the ground fault detection lock signal is not output. Therefore, the ground fault detection calculation means 22 continues to monitor the gas pressure. In this state, the gas circuit breaker 3 is activated by the operation of the protective device.
Even if 8 trips, the pressure rise in the gas circuit breaker container 38 due to the interruption of the ground fault current is smaller than the pressure rise when the ground fault accident occurs. Further, the pressure does not increase in the other containers 31 and 33. Therefore, even if the ground fault detection mode is not locked, the ground fault detection calculation means 22 does not determine that a ground fault accident has occurred in the gas circuit breaker container 32 or the other containers 31 and 33.

【００２０】図５は、送電線３４で、１線地絡事故から
２線地絡事故へ移行した場合の信号波形を示す。１線地
絡事故発生時には、地絡過電圧監視手段１１の出力がオ
ンとなる。この状態での動作は、前述の図４の場合と同
様であり、地絡検出ロック信号は出力されず、地絡検出
演算手段２２によるガス圧力監視が行われる。次に、２
線地絡事故に移行すると、母線３５の電圧が低下し、交
流不足電圧監視手段１２の出力のオンにより第１のＯＲ
回路１４の出力がオンとなる。したがって、第１のＡＮ
Ｄ回路１６の出力がオンし、第２のＯＲ回路１８及び延
長タイマ１９の出力がオンし、地絡検出演算手段２２に
よる地絡事故検出がロックされ、短絡検出演算手段２１
による短絡事故検出が行われる。FIG. 5 shows a signal waveform in the case where the transmission line 34 shifts from a one-line ground fault to a two-line ground fault. When a 1-line ground fault accident occurs, the output of the ground fault overvoltage monitoring means 11 is turned on. The operation in this state is the same as in the case of FIG. 4 described above, the ground fault detection lock signal is not output, and the gas pressure is monitored by the ground fault detection calculation means 22. Then 2
When the line-to-ground fault occurs, the voltage of the bus bar 35 decreases and the output of the AC undervoltage monitoring means 12 is turned on to turn on the first OR.
The output of the circuit 14 is turned on. Therefore, the first AN
The output of the D circuit 16 is turned on, the outputs of the second OR circuit 18 and the extension timer 19 are turned on, the ground fault detection by the ground fault detection calculation means 22 is locked, and the short-circuit detection calculation means 21.
The short-circuit accident is detected by.

【００２１】次いで、保護装置が動作してガス遮断器３
８がトリップすると、地絡過電圧監視手段１１の出力が
オフとなり、交流不足電圧監視手段１２が復帰して第１
のＯＲ回路１４の出力がオフとなる。これにより、第２
のＯＲ回路１８の出力はオフとなるが、延長タイマ１９
によりその出力が任意の時間保持されるので、ガス遮断
器３８のトリップ後も地絡検出ロックは継続する。Next, the protection device operates to operate the gas circuit breaker 3
When 8 trips, the output of the ground fault overvoltage monitoring means 11 is turned off and the AC undervoltage monitoring means 12 returns to the first
The output of the OR circuit 14 is turned off. This allows the second
The output of the OR circuit 18 of
As a result, the output is held for an arbitrary time, so that the ground fault detection lock continues even after the trip of the gas circuit breaker 38.

【００２２】したがって、ガス遮断器３８が２線地絡事
故による短絡電流相当の大電流をトリップして、ガス遮
断器容器３２内のガス圧力が上昇しても、地絡検出演算
手段２２がガス遮断器容器３２内で地絡事故が発生した
と誤標定することはない。図６は、送電線３４で２相短
絡事故が発生した場合の信号波形を示している。２相短
絡事故が発生した場合は、地絡過電圧監視手段１１の出
力はオンとならない。このため、第１のＡＮＤ回路１６
の出力はオンとならない。Therefore, even if the gas circuit breaker 38 trips a large current equivalent to a short circuit current due to a two-wire ground fault accident, and the gas pressure in the gas circuit breaker container 32 rises, the ground fault detection calculation means 22 still operates as a gas. There is no erroneous determination that a ground fault has occurred in the circuit breaker container 32. FIG. 6 shows a signal waveform when a two-phase short circuit accident occurs in the power transmission line 34. When a two-phase short circuit accident occurs, the output of the ground fault overvoltage monitoring means 11 does not turn on. Therefore, the first AND circuit 16
Output does not turn on.

【００２３】一方、短絡事故による交流不足電圧監視手
段１２の出力のオンにより第１のＯＲ回路１４の出力が
オンとなり、第２のＡＮＤ回路１５の出力がオフである
ため、第３のＡＮＤ回路１７、第２のＯＲ回路１８及び
延長タイマ１９の出力がオンし、地絡検出演算手段２２
による地絡事故検出がロックされ、短絡検出演算手段２
１による短絡事故検出が行われる。On the other hand, the output of the first OR circuit 14 is turned on when the output of the AC undervoltage monitoring means 12 is turned on due to a short circuit accident, and the output of the second AND circuit 15 is turned off. 17, the outputs of the second OR circuit 18 and the extension timer 19 are turned on, and the ground fault detection calculation means 22
Ground fault accident detection due to is locked, short circuit detection calculation means 2
Short circuit accident detection by 1 is performed.

【００２４】次に、保護装置が動作してガス遮断器３８
がトリップすると、交流不足電圧監視手段１２の復帰に
より第１のＯＲ回路１４の出力がオフし、第３のＡＮＤ
回路１７及び第２のＯＲ回路１８の出力がオフするが、
延長タイマ１９により地絡検出ロック信号は任意の時間
保持され、ガス遮断器３８のトリップ後も地絡検出ロッ
クが継続する。したがって、ガス遮断器容器３２内で短
絡電流をトリップしてガス圧力が上昇しても、地絡検出
演算手段２２はガス遮断器容器３２内で地絡事故が発生
したと判定せず、誤標定はされない。Next, the protective device is activated and the gas circuit breaker 38 is activated.
Is tripped, the output of the first OR circuit 14 is turned off by the return of the AC undervoltage monitoring means 12, and the third AND circuit is turned off.
The outputs of the circuit 17 and the second OR circuit 18 are turned off,
The ground fault detection lock signal is held for an arbitrary time by the extension timer 19, and the ground fault detection lock continues even after the gas circuit breaker trips. Therefore, even if the short circuit current is tripped in the gas circuit breaker container 32 and the gas pressure rises, the ground fault detection calculation means 22 does not determine that a ground fault accident has occurred in the gas circuit breaker container 32, and mis-locates. It is not done.

【００２５】図７は、母線３５で１線地絡事故が発生し
た場合の信号波形を示している。地絡事故が発生する
と、地絡過電圧監視手段１１の出力がオンするが、交流
不足電圧監視手段１２は動作せず第１のＯＲ回路１４の
出力はオフであるため、第１のＡＮＤ回路１６の出力は
オンしない。また、地絡過電圧監視手段１１の出力がオ
ンしているため、第３のＡＮＤ回路１７の出力はオフの
ままであり、地絡検出ロックは掛からない。FIG. 7 shows a signal waveform when a one-line ground fault occurs on the bus bar 35. When a ground fault accident occurs, the output of the ground fault overvoltage monitoring means 11 turns on, but the AC undervoltage monitoring means 12 does not operate and the output of the first OR circuit 14 is off, so the first AND circuit 16 Output does not turn on. Further, since the output of the ground fault overvoltage monitoring means 11 is on, the output of the third AND circuit 17 remains off, and the ground fault detection lock is not applied.

【００２６】次に、保護装置の動作によりガス遮断器３
８がトリップして系統が停電すると、母線電圧は３相共
０Ｖとなる。これにより、相電圧監視手段１３の全出力
のオンにより第２のＡＮＤ回路１５の出力はオンとな
り、第３のＡＮＤ回路１７の出力はオフとなる。したが
って、第２のＯＲ回路１８及び延長タイマ１９の出力は
オフのままであり、地絡検出ロックが掛からないので、
地絡演算監視手段２２は母線容器３３内で地絡事故が発
生したことを正常に標定する。Next, the gas circuit breaker 3 is activated by the operation of the protective device.
When 8 trips and the system loses power, the bus voltage becomes 0V for all three phases. As a result, the output of the second AND circuit 15 is turned on and the output of the third AND circuit 17 is turned off by turning on all the outputs of the phase voltage monitoring means 13. Therefore, the outputs of the second OR circuit 18 and the extension timer 19 remain off, and the ground fault detection lock is not applied.
The ground fault calculation monitoring means 22 normally locates the occurrence of the ground fault accident in the bus container 33.

【００２７】図８は、母線３５で、１線地絡事故から２
線地絡事故へ移行した場合の各信号波形を示す。１線地
絡事故発生時には、地絡過電圧監視手段１１の出力がオ
ンとなる。この状態での動作は、前述の図４の場合と同
様であり、地絡検出ロック信号は出力されず、地絡検出
演算手段２２はガス圧力監視を行う。次に、２線地絡事
故に移行すると、母線３５の電圧が低下し、交流不足電
圧監視手段１２の出力のオンにより第１のＯＲ回路１４
の出力がオンとなる。したがって、第１のＡＮＤ回路１
６の出力がオンし、第２のＯＲ回路１８及び延長タイマ
１９の出力がオンするので、地絡検出演算手段２２によ
る地絡検出がロックされ、短絡検出演算手段２１による
短絡事故検出が行われる。FIG. 8 shows a bus 35, which is 2 from a 1-line ground fault accident.
The signal waveforms at the time of the transition to a line-to-ground fault are shown. When a 1-line ground fault accident occurs, the output of the ground fault overvoltage monitoring means 11 is turned on. The operation in this state is the same as that in the case of FIG. 4 described above, the ground fault detection lock signal is not output, and the ground fault detection calculation means 22 monitors the gas pressure. Next, when a 2-wire ground fault occurs, the voltage of the bus bar 35 decreases and the output of the AC undervoltage monitoring means 12 is turned on, whereby the first OR circuit 14 is turned on.
The output of turns on. Therefore, the first AND circuit 1
Since the output of 6 is turned on and the outputs of the second OR circuit 18 and the extension timer 19 are turned on, the ground fault detection by the ground fault detection calculation means 22 is locked, and the short circuit accident detection is performed by the short circuit detection calculation means 21. .

【００２８】次いで、保護装置が動作してガス遮断器３
８がトリップすると、系統が停電となる。これにより、
地絡過電圧監視手段１１の出力がオフとなるため、第２
のＯＲ回路１８の出力はオフするが、地絡検出ロック信
号は延長タイマ１９により保持される。したがって、地
絡検出演算手段２２が事故電流を遮断したガス遮断器容
器３２で地絡事故が発生したと誤標定することはなく、
短絡検出演算手段２１により母線容器３３内で短絡事故
が発生したことが標定される。Next, the protective device operates to operate the gas circuit breaker 3
When 8 trips, the system goes out of power. This allows
Since the output of the ground fault overvoltage monitoring means 11 is turned off, the second
The output of the OR circuit 18 is turned off, but the ground fault detection lock signal is held by the extension timer 19. Therefore, the ground fault detection / calculation unit 22 does not erroneously determine that a ground fault has occurred in the gas circuit breaker container 32 that has cut off the fault current.
The short-circuit detection calculation means 21 determines that a short-circuit accident has occurred in the busbar container 33.

【００２９】図９は、母線３５で２相短絡事故が発生し
た場合の各信号波形を示す。２相短絡事故が発生したと
きは、地絡過電圧監視手段１１の出力はオンとならない
が、交流不足電圧監視手段１２の出力のオンにより第１
のＯＲ回路１４の出力がオンするため、第３のＡＮＤ回
路１７の出力がオンする。したがって、第２のＯＲ回路
１８及び延長タイマ１９の出力がオンし、地絡検出演算
手段２２による地絡検出動作がロックされ、短絡検出演
算手段２１による短絡事故検出が行われる。FIG. 9 shows signal waveforms when a two-phase short circuit accident occurs on the bus bar 35. When a two-phase short-circuit accident occurs, the output of the ground fault overvoltage monitoring means 11 does not turn on, but the output of the AC undervoltage monitoring means 12 turns on.
Since the output of the OR circuit 14 is turned on, the output of the third AND circuit 17 is turned on. Therefore, the outputs of the second OR circuit 18 and the extension timer 19 are turned on, the ground fault detection operation of the ground fault detection calculation means 22 is locked, and the short circuit accident detection is performed by the short circuit detection calculation means 21.

【００３０】次いで、保護装置の動作によりガス遮断器
３８がトリップすると、系統が停電となるため、相電圧
監視手段１３の全出力のオンにより、第２のＡＮＤ回路
１５の出力がオンするため、第３のＡＮＤ回路１７の出
力はオフとなる。したがって、第２のＯＲ回路１８の出
力はオフとなるが、地絡検出ロック信号は延長タイマ１
９により任意の時間保持される。Next, when the gas circuit breaker 38 trips due to the operation of the protection device, the system is cut off, and all outputs of the phase voltage monitoring means 13 are turned on, so that the output of the second AND circuit 15 is turned on. The output of the third AND circuit 17 is turned off. Therefore, the output of the second OR circuit 18 is turned off, but the ground fault detection lock signal is
9 holds for any time.

【００３１】これにより、地絡検出演算手段２２が事故
電流を遮断したガス遮断器容器３２で地絡事故が発生し
たと誤標定することはなくなり、短絡検出演算手段２１
が事故の発生した母線容器３３を正常に標定する。図１
０は、送電線３４で微地絡が発生し、それが復帰した
後、送電線に短絡事故が発生した場合の信号波形を示
す。微地絡が発生すると、地絡過電圧監視手段１１の出
力はオンし、微地絡の終了と共に復帰して出力をオフと
する。この間、地絡過電圧の立ち上がりにより地絡検出
演算手段２２が地絡演算を開始し、地絡過電圧が復帰を
しても演算を継続して行う。As a result, the ground fault detection calculation means 22 will not erroneously determine that a ground fault accident has occurred in the gas circuit breaker container 32 that has cut off the accident current, and the short circuit detection calculation means 21 will not occur.
Normalizes the bus container 33 in which the accident occurred. FIG.
0 indicates a signal waveform in the case where a short circuit fault has occurred in the power transmission line after a fine ground fault has occurred in the power transmission line 34 and has been restored. When a fine ground fault occurs, the output of the ground fault overvoltage monitoring means 11 is turned on, and the output is turned off by returning with the end of the fine ground fault. During this period, the ground fault detection calculation unit 22 starts the ground fault calculation due to the rise of the ground fault overvoltage, and continues the calculation even if the ground fault overvoltage is restored.

【００３２】その直後に短絡事故が発生すると、交流不
足電圧監視手段１２の出力がオンすることにより第１の
ＯＲ回路１４の出力がオンとなるので、第３のＡＮＤ回
路１７がオンし、第２のＯＲ回路１８及び延長タイマ１
９の出力がオンし、地絡検出演算手段２２による地絡検
出動作がロックされ、短絡検出演算手段２１による短絡
事故検出が行われる。If a short-circuit accident occurs immediately after that, the output of the AC undervoltage monitoring means 12 is turned on and the output of the first OR circuit 14 is turned on, so that the third AND circuit 17 is turned on and the third AND circuit 17 is turned on. 2 OR circuit 18 and extension timer 1
The output of 9 is turned on, the ground fault detection operation of the ground fault detection calculation means 22 is locked, and the short circuit accident detection is performed by the short circuit detection calculation means 21.

【００３３】次いで、保護装置の動作によりガス遮断器
３８がトリップすると、系統が停電となるため、相電圧
監視手段１３の全出力のオンにより第２のＡＮＤ回路１
５の出力がオンするため、第３のＡＮＤ回路１７の出力
はオフとなる。したがって、第２のＯＲ回路１８の出力
はオフとなるが、地絡検出ロック信号は延長タイマ１９
により任意の時間保持される。Next, when the gas circuit breaker 38 trips due to the operation of the protection device, the system is cut off, so that the second AND circuit 1 is turned on by turning on all the outputs of the phase voltage monitoring means 13.
Since the output of 5 turns on, the output of the third AND circuit 17 turns off. Therefore, the output of the second OR circuit 18 is turned off, but the ground fault detection lock signal is
Can be held for any length of time.

【００３４】これにより、地絡検出演算手段２２が事故
電流を遮断したガス遮断器容器３２で地絡事故が発生し
たと誤標定することはなくなり、短絡検出演算手段２１
が事故の発生した母線容器３３を正常に標定する。As a result, the ground fault detection calculation means 22 will not erroneously determine that a ground fault accident has occurred in the gas circuit breaker container 32 that cuts off the accident current, and the short circuit detection calculation means 21 will not occur.
Normalizes the bus container 33 in which the accident occurred.

【００３５】[0035]

【発明の効果】本発明によれば、事故点標定装置におけ
る事故発生時の誤標定を防止することにより、事故点標
定装置を高信頼なものとすることができる。According to the present invention, it is possible to make the accident point locating device highly reliable by preventing erroneous locating when an accident occurs in the accident point locating device.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明における地絡検出ロック手段の回路図。FIG. 1 is a circuit diagram of ground fault detection lock means according to the present invention.

【図２】本発明の事故点標定装置の実施例のブロック
図。FIG. 2 is a block diagram of an embodiment of an accident point locating device of the present invention.

【図３】ＧＩＳの構成を示す図。FIG. 3 is a diagram showing a configuration of GIS.

【図４】図１の地絡検出ロック手段の動作を説明するた
めの波形図（その１）。FIG. 4 is a waveform diagram (No. 1) for explaining the operation of the ground fault detection lock means of FIG. 1.

【図５】図１の地絡検出ロック手段の動作を説明するた
めの波形図（その２）。5 is a waveform diagram (part 2) for explaining the operation of the ground fault detection lock means of FIG. 1. FIG.

【図６】図１の地絡検出ロック手段の動作を説明するた
めの波形図（その３）。6 is a waveform diagram (part 3) for explaining the operation of the ground fault detection lock means of FIG. 1. FIG.

【図７】図１の地絡検出ロック手段の動作を説明するた
めの波形図（その４）。FIG. 7 is a waveform diagram (part 4) for explaining the operation of the ground fault detection lock means of FIG. 1.

【図８】図１の地絡検出ロック手段の動作を説明するた
めの波形図（その５）。FIG. 8 is a waveform diagram (No. 5) for explaining the operation of the ground fault detection lock means of FIG. 1.

【図９】図１の地絡検出ロック手段の動作を説明するた
めの波形図（その６）。9 is a waveform diagram (No. 6) for explaining the operation of the ground fault detection lock means of FIG. 1. FIG.

【図１０】図１の地絡検出ロック手段の動作を説明する
ための波形図（その７）。FIG. 10 is a waveform diagram (No. 7) for explaining the operation of the ground fault detection lock means of FIG. 1.

【符号の説明】[Explanation of symbols]

１０…地絡検出ロック手段 １１…地絡過電圧監視手段 １２…交流不足電圧監視手段 １３…相電圧監視手段 １４，１８…ＯＲ回路 １５，１６，１７…ＡＮＤ回路 １９…延長タイマ ２０…事故点標定装置 ２１…短絡検出演算手段 ２２…地絡検出演算手段 ２４…表示手段 ２５，２６…インタフェース ３１…ケーブルヘッド容器 ３２…ガス遮断器容器 ３３…母線容器 ３４…送電線 ３５…母線 ３６…ケーブルヘッド ３７…断路器 ３８…ガス遮断器 ３９，４０，４１…圧力センサ ４２…ＧＰＴ 10 ... Ground fault detection lock means 11 ... Ground fault overvoltage monitoring means 12 ... AC undervoltage monitoring means 13 ... Phase voltage monitoring means 14, 18 ... OR circuit 15, 16, 17 ... AND circuit 19 ... Extension timer 20 ... Fault location Device 21 ... Short-circuit detection calculation means 22 ... Ground fault detection calculation means 24 ... Display means 25, 26 ... Interface 31 ... Cable head container 32 ... Gas circuit breaker container 33 ... Bus container 34 ... Transmission line 35 ... Bus 36 ... Cable head 37 ... Disconnector 38 ... Gas circuit breaker 39, 40, 41 ... Pressure sensor 42 ... GPT

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 ガス絶縁機器容器内のガス圧力と母線電
圧とを入力信号として、地絡検出演算手段と短絡検出演
算手段とを用いて地絡事故又は短絡事故を検出する事故
点標定装置において、地絡事故発生時に母線に発生する
地絡過電圧を検出する地絡過電圧監視手段と、母線にお
ける交流不足電圧を検出する交流不足電圧監視手段と、
母線の相電圧が０Ｖであることを検出する母線相電圧監
視手段と、前記地絡過電圧監視手段と前記交流不足電圧
監視手段と前記母線相電圧監視手段からの信号を論理的
に組合せ、前記地絡検出演算手段に対して動作を禁止す
る信号を出力する地絡ロック手段とを具備する事故点標
定装置。1. An accident point locating device for detecting a ground fault or a short-circuit accident by using the gas pressure and bus voltage in a gas-insulated equipment container as input signals and using the ground-fault detection calculation means and the short-circuit detection calculation means. A ground fault overvoltage monitoring means for detecting a ground fault overvoltage generated on the bus when a ground fault occurs, and an AC undervoltage monitoring means for detecting an AC undervoltage on the bus,
The bus phase voltage monitoring means for detecting that the phase voltage of the bus is 0V, the ground fault overvoltage monitoring means, the AC undervoltage monitoring means, and the signals from the bus phase voltage monitoring means are logically combined, An accident point locating device comprising: a ground fault lock unit that outputs a signal that prohibits operation to the fault detection calculation unit.
JP32224794A 1994-12-26 1994-12-26 Accident point location device Expired - Fee Related JP3259556B2 (en)

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JP32224794A JP3259556B2 (en) 1994-12-26 1994-12-26 Accident point location device

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Application Number Priority Date Filing Date Title
JP32224794A JP3259556B2 (en) 1994-12-26 1994-12-26 Accident point location device

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JPH08182131A true JPH08182131A (en) 1996-07-12
JP3259556B2 JP3259556B2 (en) 2002-02-25

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JP32224794A Expired - Fee Related JP3259556B2 (en) 1994-12-26 1994-12-26 Accident point location device

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109636987A (en) * 2018-12-28 2019-04-16 国网上海市电力公司 A kind of smart grounding line storage box and a kind of method for carrying out ground line operation using smart grounding line storage box

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109636987A (en) * 2018-12-28 2019-04-16 国网上海市电力公司 A kind of smart grounding line storage box and a kind of method for carrying out ground line operation using smart grounding line storage box

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