JPH08241654A - Failure detecting device for gas-blast circuit-breaker - Google Patents
Failure detecting device for gas-blast circuit-breakerInfo
- Publication number
- JPH08241654A JPH08241654A JP7068924A JP6892495A JPH08241654A JP H08241654 A JPH08241654 A JP H08241654A JP 7068924 A JP7068924 A JP 7068924A JP 6892495 A JP6892495 A JP 6892495A JP H08241654 A JPH08241654 A JP H08241654A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- gas
- circuit breaker
- pressure rise
- detection unit
- 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
Links
- 238000001514 detection method Methods 0.000 claims description 79
- 238000012544 monitoring process Methods 0.000 claims description 15
- 241000220317 Rosa Species 0.000 abstract 1
- 238000009413 insulation Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 229910018503 SF6 Inorganic materials 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 2
- 229960000909 sulfur hexafluoride Drugs 0.000 description 2
- 239000002184 metal Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ガス遮断器やガス絶縁
開閉装置の遮断器ガス区画などのガス遮断器の内部で地
絡または短絡故障が発生した際に、故障を検出するガス
遮断器の故障検出装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas circuit breaker for detecting a fault when a ground fault or a short circuit fault occurs inside a gas circuit breaker such as a gas circuit breaker or a circuit breaker gas compartment of a gas insulated switchgear. The failure detection device.
【０００２】[0002]
【従来の技術】一般に、ガス遮断器、あるいはガス絶縁
開閉装置の遮断器ガス区画は、遮断器を金属容器に収納
するとともに、六フッ化硫黄ガスなどの絶縁ガスを封入
して形成されており、小型化、高信頼性および安全性に
優れている。しかし、万一、ガス遮断器の内部で地絡ま
たは短絡故障が発生した場合には、保護リレーにより故
障を検出して、故障が継続しないようにしているが、保
護リレー情報のみでは故障発生したガス遮断器を特定す
ることができない。また、ガス遮断器は密閉構造である
ため、故障発生したガス遮断器を外部から目視により確
認することは困難である。このため、地絡あるいは短絡
故障の発生時には、その故障アークエネルギーによって
絶縁ガスのガス圧力が上昇するので、この圧力上昇を検
出することによってガス遮断器の故障を検出することが
ある。この故障検出装置は、従来、ガス遮断器に圧力セ
ンサを設けて、この圧力センサによって絶縁ガスの圧力
値を計測する。そして、圧力センサの出力である圧力値
と封入圧力値との差から圧力上昇値を求め、この圧力上
昇値が予め設定された監視値を越えたときに、故障と判
定するように構成されている。2. Description of the Related Art Generally, a gas circuit breaker or a circuit breaker gas section of a gas insulated switchgear is formed by housing the circuit breaker in a metal container and enclosing an insulating gas such as sulfur hexafluoride gas. Excellent in miniaturization, high reliability and safety. However, in the unlikely event that a ground fault or short-circuit fault occurs inside the gas circuit breaker, the fault is detected by the protection relay so that the fault does not continue, but the fault occurred only with the protection relay information. The gas circuit breaker cannot be specified. Further, since the gas circuit breaker has a closed structure, it is difficult to visually confirm the faulty gas circuit breaker from the outside. Therefore, when a ground fault or a short-circuit fault occurs, the gas pressure of the insulating gas rises due to the fault arc energy. Therefore, a failure of the gas circuit breaker may be detected by detecting this pressure rise. Conventionally, this failure detection device is provided with a pressure sensor in a gas circuit breaker, and the pressure sensor measures the pressure value of the insulating gas. Then, a pressure increase value is obtained from the difference between the pressure value output from the pressure sensor and the enclosed pressure value, and when the pressure increase value exceeds a preset monitoring value, it is determined that a failure has occurred. There is.
【０００３】また、ガス絶縁開閉装置においては、通
常、その内部は遮断器ガス区画や断路器ガス区画などの
複数のガス区画に区分されており、電力の安定供給の観
点から、故障が発生したガス区画以外の健全なガス区画
で、かつ電圧印加を行っても支障がないガス区画を早期
復旧し、停電時間を短くすることが必要となる。したが
って、故障区画を検出するために、故障区画検出装置が
使用される場合もあり、上記故障検出装置の出力はこの
故障区画検出装置の一入力としても利用される。Further, in the gas-insulated switchgear, the inside thereof is usually divided into a plurality of gas compartments such as a circuit breaker gas compartment and a disconnector gas compartment, and a failure has occurred from the viewpoint of stable power supply. It is necessary to shorten the power outage time by recovering the sound gas section other than the gas section that is healthy and has no trouble even when voltage is applied, in an early stage. Therefore, in order to detect the faulty section, a faulty section detecting device may be used, and the output of the faulty detecting apparatus is also used as one input of the faulty section detecting device.
【０００４】[0004]
【発明が解決しようとする課題】上記従来の故障検出装
置においては、以下の課題があった。ガス遮断器の内部
で地絡または短絡故障が発生した場合、故障アークエネ
ルギーでガス圧力が上昇する。また、故障が継続しない
ように、保護リレーが動作し、遮断器開極指令信号によ
り遮断器が開極され、この開極時の遮断器の接触子間ア
ーク、すなわち遮断器開極アークが発生し、そのアーク
エネルギーによってもガス圧力が上昇する。一方、当該
ガス遮断器以外で地絡または短絡故障が発生した場合、
当該ガス遮断器の内部の故障ではないため、故障アーク
によるガス圧力の上昇は無いが、当該ガス遮断器以外で
の故障が継続しないように、保護リレーが動作し、遮断
器開極指令信号により当該ガス遮断器が開極されるた
め、遮断器開極アークが発生し、そのアークエネルギー
によってガス圧力が上昇する。このため、圧力上昇のレ
ベル検出により故障を判定する従来の故障検出装置で
は、検出した圧力上昇が、故障アークによるものか、遮
断器開極アークによるものかの区別ができず、ガス遮断
器の故障が検出できなくなる。The above-mentioned conventional failure detection device has the following problems. If a ground fault or a short circuit fault occurs inside the gas circuit breaker, the fault arc energy causes the gas pressure to rise. In addition, the protection relay operates so that the failure does not continue, the circuit breaker is opened by the circuit breaker opening command signal, and the arc between the contactors of the circuit breaker at this opening, that is, the circuit breaker opening arc occurs. However, the arc energy also increases the gas pressure. On the other hand, if a ground fault or a short-circuit fault occurs in other than the gas circuit breaker,
Since the gas pressure does not rise due to the fault arc because it is not an internal failure of the gas circuit breaker, the protection relay operates and the circuit breaker opening command signal is sent to prevent the failure other than the gas circuit breaker from continuing. Since the gas circuit breaker is opened, a circuit breaker opening arc is generated, and the arc energy increases the gas pressure. Therefore, in the conventional failure detection device that determines a failure by detecting the level of pressure rise, it is impossible to distinguish whether the detected pressure rise is due to a fault arc or a circuit breaker opening arc, and the gas circuit breaker Failure cannot be detected.
【０００５】そこで、本発明の目的は、遮断器開極アー
クによる圧力上昇があった場合においても、故障を正し
く検出することができるガス遮断器の故障検出装置を提
供することである。Therefore, an object of the present invention is to provide a gas circuit breaker failure detection device which can correctly detect a failure even when there is a pressure rise due to a circuit breaker opening arc.
【０００６】[0006]
【課題を解決するための手段】内部に遮断器が収納され
るとともに、絶縁性ガスが封入されたガス遮断器の各ガ
ス遮断器のガス圧力を検出する圧力センサを、各ガス遮
断器毎に設ける。この各圧力センサの出力から各ガス遮
断器毎の圧力上昇を検出する圧力上昇検出部を設ける。
保護リレーからの保護リレー動作信号で保護リレー動作
を検出する保護リレー動作検出部を設ける。この保護リ
レー動作検出部で保護リレー動作を検出し、かつ圧力上
昇検出部の出力の中から、最初の１番目および２番目に
圧力上昇を検出した圧力上昇検出部の出力をそれぞれ選
択する選択部を設ける。この選択部で選択された２つの
出力の時間差を検出する時間差検出部を設ける。この時
間差検出部からの時間差が、予め設定された、ガス遮断
器における、故障発生時に圧力センサへ、故障アークの
圧力上昇が到達してから、保護リレー動作によるガス遮
断器の開極アークの圧力上昇が到達するまでの時間であ
る、時間差監視値以上の場合に、選択部で出力している
１番目に圧力上昇を検出した圧力上昇検出部に対応する
ガス遮断器を故障と判定する判定部を設ける。[MEANS FOR SOLVING THE PROBLEMS] A pressure sensor for accommodating a circuit breaker inside and for detecting the gas pressure of each gas circuit breaker of a gas circuit breaker filled with an insulating gas is provided for each gas circuit breaker. Set up. A pressure rise detection unit for detecting a pressure rise for each gas circuit breaker from the output of each pressure sensor is provided.
A protection relay operation detection unit for detecting the protection relay operation by the protection relay operation signal from the protection relay is provided. A selection unit that detects the protection relay operation by this protection relay operation detection unit and selects the output of the pressure rise detection unit that detected the first and second pressure rises from the outputs of the pressure rise detection unit, respectively. To provide. A time difference detection unit that detects a time difference between the two outputs selected by the selection unit is provided. This time difference from the time difference detection unit is the preset pressure of the opening arc of the gas circuit breaker due to the protection relay operation after the pressure rise of the fault arc reaches the pressure sensor when a failure occurs in the gas circuit breaker. The determination unit that determines that the gas circuit breaker corresponding to the first pressure increase detection unit that is outputting the selection unit has a failure when the increase is equal to or longer than the time difference monitoring value To provide.
【０００７】[0007]
【作用】本発明は上記の如く構成することにより、故障
アークの圧力上昇と遮断器開極アークの圧力上昇とを区
別し、故障ガス遮断器のみを故障と判定することができ
る。すなわち、アークによる圧力上昇が、そのアークが
発生してから圧力センサに到達するまでの時間を圧力上
昇の伝搬遅れ時間とすると、故障アークの圧力上昇が圧
力センサに到達する時点は、故障発生してから、圧力セ
ンサと故障アーク位置との距離で決まる圧力上昇の伝搬
遅れ時間後となる。一方、遮断器開極アークの圧力上昇
が圧力センサに到達する時点は、故障発生してから、保
護リレーの動作時間と、遮断器の開極時間と、圧力セン
サと遮断器開極アーク位置との距離で決まる圧力上昇の
伝搬遅れ時間とを加算した時間後となる。このため、故
障アークの圧力上昇が圧力センサに到達する時点と、遮
断器開極アークの圧力上昇が圧力センサに到達する時点
とには時間差があり、また、最初に圧力センサへ到達す
る圧力上昇は故障アークによるものである。したがっ
て、複数のガス遮断器の中で故障ガス遮断器がある場
合、圧力センサの出力から圧力上昇を検出した圧力上昇
検出部の中で、最初の１番目に圧力上昇を検出した圧力
検出部の出力は故障アークによるものであり、２番目に
圧力上昇を検出した圧力検出部の出力は遮断器開極アー
クによるものである。この２つの圧力上昇検出部の出力
が選択部で選択され、選択された２つの出力の時間差が
時間差検出部で検出される。その時間差は予め設定され
た時間差監視値以上であり、判定部においては、最初の
１番目に圧力上昇を検出した圧力上昇検出部に対応する
ガス遮断器を故障と判定し、故障ガス遮断器を検出する
ことができる。一方、ガス遮断器以外で故障が発生し、
遮断器開極アークの圧力上昇のみが発生した場合は、各
ガス遮断器の遮断器がほぼ同時に開極する。このため、
圧力上昇検出部の出力の中から選択部で選択された、最
初の１番目および２番目に圧力上昇を検出した圧力検出
部の出力は、ともに遮断器開極アークによるものであ
り、ほぼ同時に出力される。したがって、時間差検出部
で検出される時間差は殆ど零となり、予め設定された時
間差監視値未満であり、判定部においては、故障無しと
判定される。したがって、故障アークによる圧力上昇と
遮断器開極アークによる圧力上昇とを区別し、健全ガス
遮断器を故障と判定せず、故障当該ガス遮断器のみを故
障と判定することができる。With the configuration of the present invention as described above, it is possible to distinguish between the pressure rise of the faulty arc and the pressure rise of the circuit breaker opening arc, and to judge only the faulty gas circuit breaker as a fault. That is, if the pressure rise due to the arc is the propagation delay time of the pressure rise from the occurrence of the arc until it reaches the pressure sensor, a failure occurs at the time when the pressure rise of the fault arc reaches the pressure sensor. Then, after the propagation delay time of the pressure rise determined by the distance between the pressure sensor and the position of the faulty arc. On the other hand, at the time when the pressure rise of the circuit breaker opening arc reaches the pressure sensor, the operation time of the protection relay, the circuit breaker opening time, the pressure sensor and the circuit breaker opening arc position after the failure occurs. This is after the time obtained by adding the propagation delay time of the pressure increase determined by the distance of. Therefore, there is a time lag between the time when the pressure rise of the fault arc reaches the pressure sensor and the time when the pressure rise of the circuit breaker opening arc reaches the pressure sensor, and the pressure rise reaches the pressure sensor first. Is due to a fault arc. Therefore, when there is a faulty gas circuit breaker among the plurality of gas circuit breakers, the pressure detection unit that detects the pressure increase from the output of the pressure sensor is the first pressure detection unit that detects the pressure increase. The output is due to the fault arc, and the output of the pressure detection unit that detects the second pressure rise is due to the circuit breaker opening arc. The outputs of these two pressure rise detection units are selected by the selection unit, and the time difference between the two selected outputs is detected by the time difference detection unit. The time difference is greater than or equal to a preset time difference monitoring value, and the determination unit determines that the gas circuit breaker corresponding to the first pressure increase detection unit that has detected the first pressure increase is a failure, and the failure gas circuit breaker is Can be detected. On the other hand, a failure occurred other than the gas circuit breaker,
When only the pressure rise of the circuit breaker opening arc occurs, the circuit breakers of each gas circuit breaker open at almost the same time. For this reason,
The outputs of the pressure detectors that detected the first and second pressure rises selected by the selector from the outputs of the pressure rise detectors are both due to the circuit breaker opening arc, and are output almost at the same time. To be done. Therefore, the time difference detected by the time difference detection unit is almost zero, which is less than the preset time difference monitoring value, and the determination unit determines that there is no failure. Therefore, it is possible to distinguish between the pressure increase due to the faulty arc and the pressure increase due to the circuit breaker opening arc, and not to determine the sound gas circuit breaker as a fault, but to determine only the faulty gas circuit breaker as a fault.
【０００８】また、保護リレー動作条件で故障を判定す
ることになり、保護リレーが動作しない正常時の遮断器
の開閉操作時の接触子間アークによる圧力上昇が発生し
ても、そのガス遮断器を故障とは判定せず、誤判定を防
止することができる。Further, the failure is judged based on the operating condition of the protection relay, and even if the pressure rise due to the arc between the contacts occurs during the opening / closing operation of the circuit breaker when the protection relay does not operate normally, the gas circuit breaker It is possible to prevent erroneous determination without deciding that is a failure.
【０００９】[0009]
【実施例】本発明の一実施例を図１〜図３に示す。図１
はガス絶縁開閉装置の遮断器ガス区画の場合で、説明を
簡単にするため、２つのガス絶縁開閉装置で構成されて
いる場合を示す。図１において、ガス絶縁開閉装置１，
２のそれぞれは、スペーサ９で５つのガス区画に区分さ
れ、ガス絶縁開閉装置１は、甲母線断路器ガス区画１
１、乙母線断路器ガス区画１２、遮断器ガス区画１３、
線路断路器ガス区画１４、避雷器ガス区画１５、同様に
ガス絶縁開閉装置２は、甲母線断路器ガス区画２１、乙
母線断路器ガス区画２２、遮断器ガス区画２３、線路断
路器ガス区画２４、避雷器ガス区画２５で構成されてい
る。また、ガス絶縁開閉装置１と２は、スペーサ９を介
し、甲母線断路器ガス区画１１と２１、および乙母線断
路器ガス区画１２と２２とで連結されている。ここで、
１３，２３が遮断器ガス区画である。なお、図１におい
て、ガス絶縁開閉装置１，２の主回路の電気的結線を単
線結線図で示してあり、３１，３２は母線断路器、３
３，３４は線路断路器、３５，３６は遮断器、３９は避
雷器であり、これらの機器は導体３０を介して接続され
ている。遮断器ガス区画１３，２３の遮断器３５，３６
と線路断路器３３，３４とをそれぞれ接続する導体３０
には変流器３７，３８が設けられ、その出力は保護リレ
ー３に接続される。また、保護リレー３の遮断器開極指
令信号は、遮断器ガス区画１３，２３内の各遮断器３
５，３６へ出力される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention is shown in FIGS. FIG.
In the case of the circuit breaker gas section of the gas insulated switchgear, for simplicity of explanation, the case is shown in which it is composed of two gas insulated switchgear. 1, the gas-insulated switchgear 1,
Each of the two is divided into five gas compartments by the spacer 9, and the gas-insulated switchgear 1 includes the insular bus disconnector gas compartment 1
1, Otsubo disconnector gas compartment 12, circuit breaker gas compartment 13,
The line disconnector gas section 14, the lightning arrester gas section 15, and similarly the gas insulated switchgear 2 includes the A bus line disconnector gas section 21, the Otobusen disconnector gas section 22, the circuit breaker gas section 23, the line disconnector gas section 24, It consists of a lightning arrester gas compartment 25. Further, the gas insulated switchgear 1 and 2 are connected to each other via a spacer 9 by an A bus line disconnector gas compartments 11 and 21 and an Otsu bus line disconnector gas compartments 12 and 22. here,
13 and 23 are circuit breaker gas compartments. In addition, in FIG. 1, the electrical connections of the main circuits of the gas-insulated switchgears 1 and 2 are shown in a single-line connection diagram, where 31 and 32 are busbar disconnectors and 3
3 and 34 are line disconnectors, 35 and 36 are circuit breakers, and 39 is a lightning arrester, and these devices are connected via a conductor 30. Circuit breakers Gas compartments 13, 23 circuit breakers 35, 36
Conductors 30 for connecting the line breaker 33 and the line disconnector 33, 34, respectively.
Are provided with current transformers 37 and 38, and their outputs are connected to the protection relay 3. Further, the circuit breaker opening command signal of the protection relay 3 is sent to each circuit breaker 3 in the circuit breaker gas compartments 13 and 23.
It is output to 5, 36.
【００１０】遮断器ガス区画１３，２３のそれぞれのガ
ス圧力を検出する圧力センサＳ１３，Ｓ２３を設ける。
圧力センサＳ１３，Ｓ２３の出力信号から個別に各遮断
器ガス区画１３，２３の圧力上昇をそれぞれ検出する圧
力上昇検出部Ｄ１３，Ｄ２３を設ける。圧力上昇検出部
Ｄ１３は、例えば、予め設定された圧力上昇監視値と、
圧力センサＳ１３の出力の変化から求めた圧力上昇値と
を比較し、その圧力上昇値が圧力上昇監視値以上となっ
た場合、圧力上昇有りと判定することで圧力上昇の検出
ができる。同様に、圧力上昇検出部Ｄ２３も実現でき
る。Pressure sensors S13 and S23 for detecting the gas pressures of the circuit breaker gas compartments 13 and 23 are provided.
Pressure rise detectors D13 and D23 for individually detecting the pressure rises of the circuit breaker gas sections 13 and 23 from the output signals of the pressure sensors S13 and S23 are provided. The pressure rise detection unit D13, for example, sets a preset pressure rise monitoring value,
The pressure increase value obtained from the change in the output of the pressure sensor S13 is compared, and if the pressure increase value is equal to or higher than the pressure increase monitoring value, it is possible to detect the pressure increase by determining that there is a pressure increase. Similarly, the pressure rise detection unit D23 can be realized.
【００１１】保護リレー３からの保護リレー動作信号を
検出する保護リレー動作検出部６を設ける。保護リレー
動作検出部６で保護リレー動作を検出した場合に、圧力
上昇検出部Ｄ１３，２３からの圧力上昇有りの出力タイ
ミングを調べ、最初の１番目に圧力上昇有りを出力した
圧力上昇検出部の出力と、２番目に圧力上昇有りを出力
した圧力上昇検出部の出力とを選択する選択部７１を設
ける。この選択部７１で選択された出力から、１番目に
圧力上昇有りを出力した圧力上昇検出部の出力と、２番
目に圧力上昇有りを出力した圧力上昇検出部の出力との
時間差を検出する時間差検出部７２を設ける。その時間
差検出部７２からの時間差が、予め設定された時間差監
視値以上の場合に、選択部７１で出力している１番目に
圧力上昇有りを出力した圧力上昇検出部に対応する遮断
器ガス区画を故障と判定する判定部７３を設ける。ここ
で、時間差監視値は、遮断器ガス区画１３，２３におい
て、故障発生時に圧力センサＳ１３，Ｓ２３へ、故障ア
ークの圧力上昇が到達してから、保護リレー３の動作に
よる遮断器３５，３６の開極アークの圧力上昇が到達す
るまでの時間である。A protection relay operation detector 6 for detecting a protection relay operation signal from the protection relay 3 is provided. When the protection relay operation detection unit 6 detects the protection relay operation, the output timing of the pressure rise detection units D13 and 23 indicating the presence of the pressure rise is checked, and the pressure rise detection unit that outputs the pressure rise presence is the first one. A selection unit 71 is provided for selecting the output and the output of the pressure rise detection unit that has output the second pressure rise. From the output selected by the selection unit 71, a time difference for detecting a time difference between the output of the pressure rise detection unit that first outputs the pressure rise presence and the output of the pressure rise detection unit that outputs the second pressure rise presence. A detector 72 is provided. When the time difference from the time difference detection unit 72 is equal to or larger than the preset time difference monitoring value, the circuit breaker gas section corresponding to the pressure increase detection unit that outputs the first pressure increase output from the selection unit 71 A determination unit 73 for determining that the failure is provided. Here, the time difference monitoring value is determined by the operation of the protective relay 3 of the circuit breakers 35, 36 after the pressure rise of the fault arc reaches the pressure sensors S13, S23 when the fault occurs in the circuit breaker gas sections 13, 23. It is the time until the pressure rise of the opening arc reaches.
【００１２】この時間差監視値の具体例を以下に示す。
なお、以下、圧力上昇の伝搬遅れ時間とは、アークによ
る圧力上昇が、そのアークが発生してから圧力センサＳ
１３，Ｓ２３に到達するまでの時間のことである。故障
アークの圧力上昇は、故障発生してから、故障アーク位
置から圧力センサＳ１３，Ｓ２３の取付け位置までの距
離で決まる圧力上昇の伝搬遅れ時間後に圧力センサＳ１
３またはＳ２３に到達する。一方、遮断器３５，３６の
開極アークの圧力上昇は、故障発生してから、保護リレ
ー３が動作し、それにより遮断器３５，３６が開極し、
さらにそれから遮断器３５，３６の開極アーク位置から
圧力センサＳ１３，Ｓ２３の取付け位置までの距離で決
まる圧力上昇の伝搬遅れ時間後に圧力センサＳ１３，Ｓ
２３に到達する。すなわち、故障発生してから遮断器開
極指令信号および保護リレー動作信号を出力するまでの
時間である保護リレー３の動作時間と、遮断器３５，３
６の開極時間と、圧力上昇の伝搬遅れ時間とを加算した
時間後に圧力センサＳ１３，２３に到達する。なお、故
障アークによる圧力上昇の伝搬遅れ時間は、遮断器ガス
区画１３または２３内での故障アークの位置が一定でな
いため変化するが、遮断器３５，３６の開極アークによ
る圧力上昇の伝搬遅れ時間は、開極アークの位置が一定
のため、変化しない。このため、時間差監視値を求める
場合は、その差が最小値となる条件で求めることにな
り、故障アークによる圧力上昇の伝搬遅れ時間は、故障
アークが圧力センサＳ１３またはＳ２３の取付け位置か
ら一番遠い位置で発生したものとして求める。これらの
アークの圧力上昇の伝搬遅れ時間は、例えば、遮断器ガ
ス区画内の絶縁ガスが六フッ化硫黄ガスの場合、次のよ
うにして求める。アーク位置から圧力センサＳ１３，Ｓ
２３の取付け位置までの絶縁ガス中の距離を、その絶縁
ガス中の圧力伝搬速度で除して求める。ここで、絶縁ガ
ス中の圧力伝搬速度は、その絶縁ガス中の音速とほぼ等
しく、１３０ｍ／ｓ前後である。A specific example of this time difference monitoring value is shown below.
Note that, hereinafter, the propagation delay time of the pressure increase means that the pressure increase due to the arc is caused by the pressure sensor S after the arc is generated.
13, the time required to reach S23. The pressure rise of the fault arc is caused by the pressure sensor S1 after the propagation delay time of the pressure rise determined by the distance from the fault arc position to the mounting position of the pressure sensors S13 and S23 after the fault occurs.
3 or S23 is reached. On the other hand, the pressure rise of the opening arc of the circuit breakers 35, 36 causes the protection relay 3 to operate after the occurrence of a failure, which causes the circuit breakers 35, 36 to open.
Further, after that, after the propagation delay time of the pressure increase determined by the distance from the opening arc position of the circuit breakers 35 and 36 to the mounting position of the pressure sensors S13 and S23, the pressure sensors S13 and S
Reach 23. That is, the operation time of the protection relay 3 which is the time from the occurrence of a failure to the output of the circuit breaker opening command signal and the protection relay operation signal, and the circuit breakers 35, 3
The pressure sensor S13, 23 is reached after a time obtained by adding the opening time of 6 and the propagation delay time of the pressure increase. The propagation delay time of the pressure rise due to the fault arc changes because the position of the fault arc in the circuit breaker gas section 13 or 23 is not constant, but the propagation delay of the pressure rise due to the opening arc of the circuit breakers 35 and 36. The time does not change because the position of the opening arc is constant. Therefore, when obtaining the time difference monitoring value, the difference is obtained under the condition that the difference becomes the minimum value, and the propagation delay time of the pressure rise due to the fault arc is the longest from the mounting position of the pressure sensor S13 or S23 when the fault arc is installed. Obtain as if it occurred at a distant position. The propagation delay time of the pressure increase of these arcs is obtained as follows when the insulating gas in the circuit breaker gas compartment is sulfur hexafluoride gas, for example. Pressure sensors S13, S from the arc position
The distance to the mounting position of 23 in the insulating gas is divided by the pressure propagation velocity in the insulating gas. Here, the pressure propagation velocity in the insulating gas is approximately equal to the speed of sound in the insulating gas, which is around 130 m / s.
【００１３】例えば、故障アーク位置と圧力センサＳ１
３またはＳ２３の取付け位置との最大距離を４ｍ、遮断
器３５，３６の開極アーク位置と圧力センサＳ１３，Ｓ
２３の取付け位置との距離を１．３ｍ、圧力伝搬速度を
１３０ｍ／ｓとした場合、故障アークの圧力上昇の伝搬
遅れ時間は約３０ｍｓ、遮断器３５，３６の開極アーク
による圧力上昇の伝搬遅れ時間は１０ｍｓとなる。した
がって、それぞれのアークの圧力上昇が圧力センサＳ１
３，Ｓ２３に到達する時間は、故障発生時を基準にする
と次となる。ただし、保護リレー３の動作時間を２５ｍ
ｓ、遮断器３５，３６の開極時間を２５ｍｓとした場合
とする。故障アークの圧力上昇が圧力センサＳ１３また
はＳ２３に到達する時間は、故障アークの圧力上昇の伝
搬遅れ時間と等しく、３０ｍｓとなる。一方、遮断器３
５，３６の開極アークの圧力上昇が圧力センサＳ１３，
Ｓ２３に到達する時間は、保護リレー３の動作時間２５
ｍｓと、遮断器３５，３６の開極時間２５ｍと、遮断器
３５，３６の開極アークによる圧力上昇の伝搬遅れ時間
１０ｍｓを加算した時間６０ｍｓとなる。以上から、予
め設定する時間差監視値は、３０ｍｓ（＝６０ｍｓ−３
０ｍｓ）となる。For example, the fault arc position and the pressure sensor S1
3 or the maximum distance from the mounting position of S23 is 4 m, the opening arc positions of the circuit breakers 35 and 36 and the pressure sensors S13 and S
When the distance from the mounting position of 23 is 1.3 m and the pressure propagation speed is 130 m / s, the propagation delay time of the pressure rise of the fault arc is about 30 ms, and the propagation of the pressure rise due to the opening arc of the circuit breakers 35 and 36. The delay time is 10 ms. Therefore, the pressure increase of each arc is caused by the pressure sensor S1.
3, the time to reach S23 is as follows based on the time of failure occurrence. However, the operating time of the protection relay 3 is 25m
It is assumed that the contact opening time of the circuit breakers 35 and 36 is 25 ms. The time required for the pressure rise of the fault arc to reach the pressure sensor S13 or S23 is equal to the propagation delay time of the pressure rise of the fault arc, which is 30 ms. On the other hand, circuit breaker 3
The pressure increase of the open arc of 5, 36 is caused by the pressure sensor S13,
The time to reach S23 is 25 hours of operation of the protection relay 3.
ms, the opening time 25 m of the circuit breakers 35 and 36, and the propagation delay time 10 ms of the pressure increase due to the opening arc of the circuit breakers 35 and 36, which is 60 ms. From the above, the preset time difference monitoring value is 30 ms (= 60 ms-3
0 ms).
【００１４】次に本発明の動作を図２および図３を用い
て説明する。図２は遮断器ガス区画１３で故障が発生し
た場合、図３は甲母線断路器ガス区画１１で故障が発生
した場合のそれぞれについて、各圧力センサＳ１３，Ｓ
２３の出力から各圧力上昇検出部Ｄ１３，Ｄ２３で圧力
上昇の有無を判定した結果出力、時間差検出部７２の出
力、保護リレー３の遮断器開極指令信号、保護リレー動
作検出部６の出力、および遮断器３５，３６の動作を示
す。Next, the operation of the present invention will be described with reference to FIGS. 2 shows a case where a failure occurs in the circuit breaker gas section 13, and FIG. 3 shows a case where a failure occurs in the instep bus disconnector gas section 11 respectively.
From the output of 23, the output of the result of determination of the presence or absence of pressure increase in each pressure rise detection unit D13, D23, the output of the time difference detection unit 72, the circuit breaker opening command signal of the protection relay 3, the output of the protection relay operation detection unit 6, The operation of the circuit breakers 35 and 36 is shown.
【００１５】図１において、遮断器ガス区画１３で、地
絡または短絡故障が発生した場合について以下に動作説
明する。遮断器ガス区画１３の故障により、変流器３
７，３８で故障電流が検出され、保護リレー３は、故障
電流によりガス絶縁開閉装置１、または２の内部で故障
が発生したと判定し、遮断器ガス区画１３，２３の各遮
断器３５，３６へ遮断器開極指令信号を出力し、遮断器
３５，３６が動作し、開極する。このため、最初に圧力
上昇するガス区画は、故障アークにより圧力上昇した故
障当該の遮断器ガス区画１３である。その後、保護リレ
ー３からの遮断器開極指令信号により、遮断器３５，３
６が開極するため、遮断器３５，３６の接触子間アーク
が発生する。この開極アークによっても圧力上昇するた
め、故障当該の遮断器ガス区画１３および健全である遮
断器ガス区画２３のガス圧力が上昇する。また、保護リ
レー動作検出部６は、保護リレー３からの保護リレー動
作信号が入力されるため、保護リレー３の動作を検出す
る。In FIG. 1, the operation will be described below in the case where a ground fault or a short-circuit fault occurs in the circuit breaker gas compartment 13. Due to a failure of the circuit breaker gas compartment 13, the current transformer 3
A fault current is detected at 7, 38, and the protection relay 3 determines that a fault has occurred inside the gas-insulated switchgear 1 or 2 due to the fault current, and each breaker 35, The circuit breaker opening command signal is output to 36, and the circuit breakers 35 and 36 operate to open the circuit. For this reason, the gas compartment in which the pressure rises first is the faulty circuit breaker gas compartment 13 in which the pressure rises due to the fault arc. After that, by the circuit breaker opening command signal from the protection relay 3, the circuit breakers 35, 3
Since 6 is opened, an arc between contacts of the circuit breakers 35 and 36 is generated. Since the pressure also rises due to this opening arc, the gas pressure in the circuit breaker gas section 13 in question and the circuit breaker gas section 23 that is sound increases. Further, since the protection relay operation signal from the protection relay 3 is input, the protection relay operation detection unit 6 detects the operation of the protection relay 3.
【００１６】ここで、故障当該の遮断器ガス区画１３の
故障アークの圧力上昇が圧力センサＳ１３へ到達し、健
全である遮断器ガス区画２３の遮断器３６の開極アーク
の圧力上昇が圧力センサＳ２３に到達する時間差は、前
記の具体例で示した条件、故障アーク位置と圧力センサ
Ｓ１３の取付け位置との最大距離を４ｍ、遮断器３６の
開極アーク位置と圧力センサＳ２３の取付け位置との距
離を１．３ｍ、圧力伝搬速度を１３０ｍ／ｓ、保護リレ
ー３の動作時間を２５ｍｓ、および遮断器３６の開極時
間を２５ｍｓとすると次のようになる。遮断器３６の開
極アークの圧力上昇が圧力センサＳ２３に到達するの
は、故障発生してから、保護リレー３の動作時間２５ｍ
ｓと遮断器３６の開極時間２５ｍｓと圧力上昇の伝搬遅
れ時間１０ｍｓを加算した時間６０ｍｓ後となる。遮断
器ガス区画１３の故障アーク位置が圧力センサＳ１３の
取付け位置から４ｍと離れた最も遠い場合、故障アーク
の圧力上昇が圧力センサＳ１３に到達するのは、故障発
生してから、故障アークの圧力上昇の伝搬遅れ時間３０
ｍｓ後となる。また、故障アーク位置が圧力センサＳ１
３の取付け位置に最も近い場合で、故障アーク位置と圧
力センサＳ１３の取付け位置との距離を０ｍとすれば、
故障アークの圧力上昇の伝搬遅れ時間は０ｍｓで、故障
発生と同時に圧力上昇は圧力センサＳ１３に到達する。
したがって、故障当該の遮断器ガス区画１３の故障アー
クの圧力上昇が圧力センサＳ１３へ到達してから、健全
である遮断器ガス区画２３の遮断器３６の開極アークの
圧力上昇が圧力センサＳ２３に到達するまで時間差は、
故障アーク位置が圧力センサＳ１３の取付け位置から最
も遠い場合は３０ｍｓ（＝６０ｍｓ−３０ｍｓ）、ま
た、最も近い場合は６０ｍｓ（＝６０ｍｓ−０ｍｓ）と
なる。Here, the pressure rise of the fault arc of the circuit breaker gas section 13 in question has reached the pressure sensor S13, and the pressure rise of the open arc of the circuit breaker 36 of the circuit breaker gas section 23 which is sound is the pressure sensor. The time difference to reach S23 is the condition shown in the above-mentioned specific example, the maximum distance between the faulty arc position and the mounting position of the pressure sensor S13 is 4 m, the opening arc position of the circuit breaker 36 and the mounting position of the pressure sensor S23. When the distance is 1.3 m, the pressure propagation velocity is 130 m / s, the operation time of the protection relay 3 is 25 ms, and the contact opening time of the circuit breaker 36 is 25 ms, the following is obtained. The pressure rise of the open arc of the circuit breaker 36 reaches the pressure sensor S23 only after the failure occurs and the operating time of the protection relay 3 is 25 m.
s, the opening time of the circuit breaker 36 of 25 ms, and the propagation delay time of pressure increase of 10 ms, which is 60 ms later. When the fault arc position of the circuit breaker gas section 13 is 4m farthest from the mounting position of the pressure sensor S13, the pressure rise of the fault arc reaches the pressure sensor S13 because the pressure of the fault arc after the fault occurs. Propagation delay time 30
It will be ms later. In addition, the position of the faulty arc is pressure sensor S1.
If the distance between the failure arc position and the mounting position of the pressure sensor S13 is 0 m when the position is closest to the mounting position of 3,
The propagation delay time of the pressure rise of the fault arc is 0 ms, and the pressure rise reaches the pressure sensor S13 at the same time when the fault occurs.
Therefore, after the pressure rise of the fault arc of the circuit breaker gas section 13 in question has reached the pressure sensor S13, the pressure rise of the open arc of the circuit breaker 36 of the circuit breaker gas section 23 which is sound is transmitted to the pressure sensor S23. The time difference until reaching
When the fault arc position is farthest from the mounting position of the pressure sensor S13, it is 30 ms (= 60 ms-30 ms), and when it is the closest, it is 60 ms (= 60 ms-0 ms).
【００１７】以上から、各遮断器ガス区画１３，２３の
ガス圧力を検出した圧力センサＳ１３，Ｓ２３の出力で
圧力上昇判定した圧力上昇検出部Ｄ１３，Ｄ２３の出力
は、図２に示す通りとなる。遮断器ガス区画１３の圧力
センサＳ１３の出力は、遮断器ガス区画２３の圧力セン
サＳ２３の出力より先に圧力上昇するため、最初の１番
目に圧力上昇検出部Ｄ１３が圧力上昇有りを出力し、そ
の後、２番目に圧力上昇検出部Ｄ２３が圧力上昇有りを
出力する。また、１番目に圧力上昇検出部Ｄ１３が圧力
上昇有りを出力してから、２番目に圧力上昇検出部Ｄ２
３が圧力上昇有りを出力するまでの時間差は、上記の例
では、３０ｍｓ〜６０ｍｓとなる。From the above, the outputs of the pressure increase detecting portions D13, D23, which determine the pressure increase by the outputs of the pressure sensors S13, S23 detecting the gas pressures of the circuit breaker gas compartments 13, 23, are as shown in FIG. . Since the output of the pressure sensor S13 of the circuit breaker gas compartment 13 rises in pressure earlier than the output of the pressure sensor S23 of the circuit breaker gas compartment 23, the pressure rise detection unit D13 first outputs the pressure rise presence, After that, the pressure rise detection unit D23 secondly outputs that there is a pressure rise. Further, after the pressure rise detection unit D13 outputs the fact that the pressure rise exists, the pressure rise detection unit D2
In the above example, the time difference until 3 outputs the pressure rise is 30 ms to 60 ms.
【００１８】選択部７１では、保護リレー動作検出部６
で保護リレー３の動作を検出しているため、最初の１番
目に圧力上昇を検出した圧力上昇検出部の出力としては
圧力上昇検出部Ｄ１３の出力を、また、それより２番目
に圧力上昇した圧力上昇検出部の出力としては圧力上昇
検出部Ｄ２３の出力を選択する。時間差検出部７２は、
選択部７１で選択された１番目に圧力上昇を検出した圧
力上昇検出部Ｄ１３の出力と、２番目に圧力上昇した圧
力上昇検出部Ｄ２３の出力との時間差を検出する。上記
の例においては、この時間差は３０ｍｓ〜６０ｍｓとな
る。In the selection unit 71, the protection relay operation detection unit 6
Since the operation of the protection relay 3 is detected by, the output of the pressure rise detection unit D13 is the first output of the pressure rise detection unit that detects the pressure rise, and the pressure rise detection unit D13 has the second highest pressure rise. The output of the pressure rise detection unit D23 is selected as the output of the pressure rise detection unit. The time difference detection unit 72
The time difference between the output of the pressure increase detecting unit D13 that detects the first pressure increase selected by the selecting unit 71 and the output of the pressure increase detecting unit D23 that detects the second pressure increase is detected. In the above example, this time difference is 30 ms to 60 ms.
【００１９】判定部７３は、時間差検出部７２からの時
間差が、予め設定された時間差監視値以上の場合、１番
目に圧力上昇を検出した圧力上昇検出部に対応する遮断
器ガス区画を故障と判定する。したがって、時間差検出
部７２からの時間差は、３０ｍｓ〜６０ｍｓであり、こ
の値は時間差監視値３０ｍｓ以上であるため、１番目に
圧力上昇を検出した圧力上昇検出部Ｄ１３に対応する遮
断器ガス区画１３を故障と判定する。当然、遮断器３６
の開極アークで圧力上昇した健全な遮断器ガス区画２３
は故障と判定しない。以上から、故障アークの圧力上昇
と遮断器開極アークの圧力上昇とを区別し、故障当該の
遮断器ガス区画１３のみを故障と判定できる。なお、故
障が遮断器ガス区画２３で発生した場合も、同様に、判
定部７３で遮断器ガス区画２３を故障と正しく判定する
ことができる。When the time difference from the time difference detection unit 72 is equal to or larger than the preset time difference monitoring value, the determination unit 73 determines that the breaker gas section corresponding to the pressure increase detection unit that first detected the pressure increase has failed. judge. Therefore, the time difference from the time difference detection unit 72 is 30 ms to 60 ms, and since this value is the time difference monitoring value of 30 ms or more, the circuit breaker gas section 13 corresponding to the pressure increase detection unit D13 that detected the first pressure increase is Is determined to be a failure. Naturally, the circuit breaker 36
Circuit breaker gas compartment 23 whose pressure was increased by the opening arc of
Does not judge it as a failure. From the above, it is possible to distinguish between the pressure rise of the faulty arc and the pressure rise of the circuit breaker opening arc, and to determine only the faulty breaker gas section 13 as a fault. Even when the failure occurs in the circuit breaker gas section 23, similarly, the determination unit 73 can correctly determine the circuit breaker gas section 23 as a failure.
【００２０】次に遮断器ガス区画１３，２３以外のガス
区画で故障が発生し、遮断器３５，３６が開極し、遮断
器ガス区画１３，２３で遮断器開極アークの圧力上昇の
みが発生した場合について説明する。ここでは、図１に
おいて、ガス絶縁開閉装置１の甲母線断路器ガス区画１
１で地絡または短絡故障が発生したものとして説明す
る。甲母線断路器ガス区画１１の故障により、変流器３
７，３８で故障電流が検出され、保護リレー３は故障電
流によりガス絶縁開閉装置１、または２の内部で故障が
発生したと判定し、遮断器３５，３６へ遮断器開極指令
信号を出力し、遮断器３５，３６がそれぞれ開極する。
このため、遮断器ガス区画１３，２３では、故障アーク
による圧力上昇は無いが、保護リレー３からの遮断器開
極指令信号により、遮断器３５，３６が開極し、遮断器
３５，３６の接触子間アークが発生し、この開極アーク
によってガス圧力が上昇する。Next, a failure occurs in a gas section other than the circuit breaker gas sections 13 and 23, the circuit breakers 35 and 36 are opened, and only the pressure rise of the circuit breaker opening arc is generated in the circuit breaker gas sections 13 and 23. The case where it occurs will be described. Here, in FIG. 1, the insular bus disconnector gas section 1 of the gas insulated switchgear 1 is used.
The description will be made assuming that the ground fault or the short-circuit fault occurs in the item 1. Current transformer 3 due to failure of gas line disconnector 11
A fault current is detected at 7, 38, and the protection relay 3 determines that a fault has occurred inside the gas insulated switchgear 1 or 2 due to the fault current, and outputs a circuit breaker opening command signal to the circuit breakers 35, 36. Then, the circuit breakers 35 and 36 are opened.
Therefore, in the circuit breaker gas compartments 13 and 23, there is no pressure rise due to the fault arc, but the circuit breaker 35 and 36 are opened by the circuit breaker opening command signal from the protection relay 3, and the circuit breaker 35 and 36 are broken. An arc is generated between the contacts, and the gas pressure rises due to this open arc.
【００２１】したがって、各遮断器ガス区画のガス圧力
を検出した圧力センサＳ１３，Ｓ２３の出力で圧力上昇
判定した圧力上昇検出部Ｄ１３，Ｄ２３の出力は、図３
に示す通りとなり、遮断器ガス区画１３，２３の圧力セ
ンサＳ１３，Ｓ２３の出力は圧力上昇するため、圧力上
昇検出部Ｄ１３，Ｄ２３は圧力上昇有りと判定し、その
判定結果を出力する。また、保護リレー動作検出部６
は、保護リレー３からの保護リレー動作信号が入力され
るため、保護リレー３の動作を検出する。Therefore, the outputs of the pressure rise detecting portions D13 and D23, which determine the pressure rise by the outputs of the pressure sensors S13 and S23 which detect the gas pressures of the circuit breaker gas compartments, are as shown in FIG.
Since the outputs of the pressure sensors S13 and S23 of the circuit breaker gas sections 13 and 23 increase in pressure, the pressure increase detection units D13 and D23 determine that there is a pressure increase and output the determination result. In addition, the protection relay operation detection unit 6
Detects the operation of the protection relay 3 because the protection relay operation signal from the protection relay 3 is input.
【００２２】しかし、圧力上昇検出部Ｄ１３，Ｄ２３で
圧力上昇有りを出力しているが、この圧力上昇は、保護
リレー３からの遮断器開極指令による遮断器３５，３６
の開極アークの圧力上昇である。遮断器３５，３６の開
極アークはほぼ同時に発生する。このため、故障発生か
ら圧力センサＳ１３，Ｓ２３にその開極アークの圧力上
昇が到達する時間はほぼ同時となり、圧力上昇検出部Ｄ
１３，Ｄ２３も圧力上昇有りをほぼ同時に出力する。選
択部７１では、保護リレー動作検出部６で保護リレー３
の動作を検出しているため、例えば、最初の１番目に圧
力上昇を検出した圧力上昇検出部の出力としては圧力上
昇検出部Ｄ１３の出力を、また、２番目に圧力上昇した
圧力上昇検出部の出力としては圧力上昇検出部Ｄ２３の
出力を選択する。時間差検出部７２は、選択部７１で選
択された１番目に圧力上昇を検出した圧力上昇検出部Ｄ
１３の出力と、２番目に圧力上昇を検出した圧力上昇検
出部Ｄ２３の出力との時間差をほぼ０ｍｓと検出する。However, although the pressure rise detection units D13 and D23 output the fact that there is a pressure rise, this pressure rise is generated by the circuit breakers 35 and 36 in response to the circuit breaker opening command from the protection relay 3.
It is the pressure rise of the opening arc of the. The opening arcs of the circuit breakers 35 and 36 occur almost at the same time. Therefore, the time when the pressure rise of the opening arc reaches the pressure sensors S13 and S23 from the occurrence of the failure is almost the same, and the pressure rise detection unit D
13 and D23 also output that the pressure has risen almost at the same time. In the selection unit 71, the protection relay 3 is detected in the protection relay operation detection unit 6.
Therefore, for example, the output of the pressure rise detection unit D13 is the first output of the pressure rise detection unit that detects the pressure rise, and the output of the pressure rise detection unit D13 that is the second pressure rise is detected. The output of the pressure rise detection unit D23 is selected as the output of the. The time difference detection unit 72 detects the first pressure increase selected by the selection unit 71 and detects the pressure increase detection unit D.
The time difference between the output of No. 13 and the output of the pressure rise detection unit D23 that detects the second pressure rise is detected to be approximately 0 ms.
【００２３】したがって、判定部７３は、時間差検出部
７２からの時間差が０ｍｓであり、予め設定された時間
差監視値３０ｍｓ未満であるため、１番目に圧力上昇を
検出した圧力上昇検出部Ｄ１３に対応する遮断器ガス区
画１３を故障と判定しない。なお、当然、遮断器ガス区
画２３も故障と判定しない。以上から、故障アークの圧
力上昇と遮断器開極アークの圧力上昇とを区別し、故障
当該遮断器ガス区画のみを故障と判定できる。Therefore, since the time difference from the time difference detection unit 72 is 0 ms, which is less than the preset time difference monitoring value of 30 ms, the determination unit 73 corresponds to the pressure increase detection unit D13 that first detects the pressure increase. The breaker gas compartment 13 is not determined to be out of order. Of course, the circuit breaker gas section 23 is not determined to be out of order. From the above, it is possible to distinguish between the pressure rise of the faulty arc and the pressure rise of the circuit breaker opening arc, and to determine only the faulty breaker gas section as a fault.
【００２４】なお、甲母線断路器ガス区画１１および遮
断器ガス区画１３，２３以外の他のガス区画で故障が発
生した場合も以上と同様に、判定部７３は故障が無いと
判定し、誤って、遮断器ガス区画１３，２３を故障と判
定しない。When a failure occurs in any other gas section other than the bus bus disconnector gas section 11 and the circuit breaker gas sections 13 and 23, the determination unit 73 determines that there is no failure and makes an error. Therefore, the circuit breaker gas sections 13 and 23 are not determined to be out of order.
【００２５】次に正常時における遮断器３５，３６の開
閉操作時の接触子間アークによる圧力上昇が発生した場
合についての動作を説明する。この場合、正常時である
ため保護リレー３は動作せず、保護リレー動作検出部６
は保護リレー３の動作を検出しない。また、判定部７３
も、選択部７１からの選択出力、および時間差検出部７
２の出力がないため、故障の判定をせず、判定部７３で
は故障無しの出力をする。したがって、正常時における
遮断器３５，３６の開閉操作時の接触子間アークによる
圧力上昇が発生した場合に、その圧力上昇により、誤っ
て遮断器ガス区画１３，２３を故障と判定しないことに
なる。Next, the operation in the case where the pressure rise due to the arc between the contacts when the circuit breakers 35 and 36 are opened / closed under normal conditions will be described. In this case, since it is a normal time, the protection relay 3 does not operate, and the protection relay operation detection unit 6
Does not detect the operation of the protection relay 3. In addition, the determination unit 73
Also, the selection output from the selection unit 71 and the time difference detection unit 7
Since there is no output of 2, the failure is not determined and the determination unit 73 outputs an output of no failure. Therefore, when a pressure rise occurs due to the arc between the contacts when the circuit breakers 35 and 36 are opened / closed under normal conditions, the pressure rise will not erroneously determine that the breaker gas sections 13 and 23 are in failure. .
【００２６】以上、実施例は、２つのガス絶縁開閉装置
の遮断器ガス区画の場合について説明したが、２つ以上
のガス絶縁開閉装置の遮断器ガス区画で構成された場
合、あるいは２つ以上のガス遮断器の場合も、同様に、
正しく故障を検出することができる。Although the embodiments have been described in the case of the breaker gas compartments of two gas-insulated switchgear, the case where the breaker gas compartments of two or more gas-insulated switchgear are configured, or two or more. In the case of the gas circuit breaker of
The failure can be detected correctly.
【００２７】[0027]
【発明の効果】以上の通り、本発明により、故障アーク
の圧力上昇と保護リレーによる遮断器開極アークの圧力
上昇との区別を、それらの圧力上昇が圧力センサに到達
する時間差で行い、故障を判定している。したがって、
故障アークによる圧力上昇と遮断器開極時の開極アーク
による圧力上昇とを区別し、健全ガス遮断器を故障と判
定せず、故障当該ガス遮断器のみを故障と正しく自動的
に判定することができる。また、保護リレー動作条件で
故障を判定しているため、保護リレーが動作しない正常
時に遮断器の開閉操作時の接触子間アークによる圧力上
昇が発生しても、そのガス遮断器を故障とは判定せず、
誤検出を防止することができる。As described above, according to the present invention, the increase in the pressure of the faulty arc and the increase in the pressure of the circuit breaker opening arc by the protection relay are distinguished from each other by the time difference between the pressure rises reaching the pressure sensor and the failure occurs. Is being determined. Therefore,
Distinguishing between the pressure rise due to the fault arc and the pressure rise due to the opening arc when the circuit breaker is opened, the sound gas circuit breaker is not determined to be faulty, but only the faulty gas circuit breaker is correctly and automatically determined to be faulty. You can In addition, since the failure is judged based on the protection relay operating condition, even if the pressure rise due to the arc between the contacts during the switching operation of the circuit breaker occurs normally when the protection relay does not operate, the gas circuit breaker is not considered to be a failure. Without judging,
False detection can be prevented.
【図１】本発明の一実施例を示す図である。FIG. 1 is a diagram showing an embodiment of the present invention.
【図２】本発明の動作を説明するための図である。FIG. 2 is a diagram for explaining the operation of the present invention.
【図３】本発明の動作を説明するための図である。FIG. 3 is a diagram for explaining the operation of the present invention.
１ ガス絶縁開閉装置 ２ ガス絶縁開閉装置 １３ 遮断器ガス区画 ２３ 遮断器ガス区画 ３ 保護リレー Ｓ１３ 圧力センサ Ｓ２３ 圧力センサ Ｄ１３ 圧力上昇検出部 Ｄ２３ 圧力上昇検出部 ６ 保護リレー動作検出部 ７１ 選択部 ７２ 時間差検出部 ７３ 判定部 1 Gas Insulated Switchgear 2 Gas Insulated Switchgear 13 Circuit Breaker Gas Section 23 Circuit Breaker Gas Section 3 Protection Relay S13 Pressure Sensor S23 Pressure Sensor D13 Pressure Rise Detection Section D23 Pressure Rise Detection Section 6 Protection Relay Operation Detection Section 71 Selection Section 72 Time Difference Detection unit 73 Judgment unit
Claims (1)
縁性ガスが封入されたガス遮断器の各ガス遮断器毎に設
けられ、そのガス圧力を検出する圧力センサと、 この各圧力センサの出力から各ガス遮断器毎の圧力上昇
を検出する圧力上昇検出部と、 保護リレーからの保護リレー動作信号で保護リレー動作
を検出する保護リレー動作検出部と、 この保護リレー動作検出部で保護リレー動作を検出し、
かつ前記圧力上昇検出部の出力の中から、最初の１番目
および２番目に圧力上昇を検出した圧力上昇検出部の出
力をそれぞれ選択する選択部と、 この選択部で選択された２つの出力の時間差を検出する
時間差検出部と、 この時間差検出部からの時間差が、予め設定された、前
記ガス遮断器における、故障発生時に前記圧力センサ
へ、故障アークの圧力上昇が到達してから、前記保護リ
レー動作による前記ガス遮断器の開極アークの圧力上昇
が到達するまでの時間である、時間差監視値以上の場合
に、前記選択部で出力している１番目に圧力上昇を検出
した圧力上昇検出部に対応するガス遮断器を故障と判定
する判定部と、 を備えたことを特徴とするガス遮断器の故障検出装置。1. A pressure sensor which houses a circuit breaker therein and is provided for each gas circuit breaker in which an insulating gas is sealed, and which detects the gas pressure, and a pressure sensor for each pressure sensor. A pressure rise detection unit that detects the pressure rise of each gas circuit breaker from the output, a protection relay operation detection unit that detects the protection relay operation with a protection relay operation signal from the protection relay, and a protection relay with this protection relay operation detection unit Motion is detected,
Further, from among the outputs of the pressure increase detection unit, a selection unit for selecting the output of the first pressure increase detection unit detecting the first pressure increase and the output of the pressure increase detection unit for the second pressure increase, respectively, and the two outputs selected by this selection unit. A time difference detection unit for detecting a time difference, and a time difference from the time difference detection unit is set in advance, after the pressure rise of the fault arc reaches the pressure sensor when a fault occurs in the gas circuit breaker, the protection is performed. When the pressure rise of the opening arc of the gas circuit breaker due to the relay operation reaches, which is equal to or greater than the time difference monitoring value, the first pressure rise detected by the selection unit is detected. A failure detection device for a gas circuit breaker, comprising: a determination unit that determines a gas circuit breaker corresponding to the unit as a failure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06892495A JP3172989B2 (en) | 1995-03-03 | 1995-03-03 | Gas circuit breaker failure detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06892495A JP3172989B2 (en) | 1995-03-03 | 1995-03-03 | Gas circuit breaker failure detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08241654A true JPH08241654A (en) | 1996-09-17 |
| JP3172989B2 JP3172989B2 (en) | 2001-06-04 |
Family
ID=13387696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06892495A Expired - Fee Related JP3172989B2 (en) | 1995-03-03 | 1995-03-03 | Gas circuit breaker failure detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3172989B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101415079B1 (en) * | 2013-05-15 | 2014-07-17 | 주식회사 비츠로테크 | Appratus for diagnosing circuit breaker |
| CN104964815A (en) * | 2015-07-01 | 2015-10-07 | 许继（厦门）智能电力设备股份有限公司 | SF6 density relay pressure contact detecting device |
| CN107387386A (en) * | 2017-09-18 | 2017-11-24 | 马鞍山钢铁股份有限公司 | A kind of opening/closing condition detection method of thin oil pump drive motor main contactor |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103064017B (en) * | 2012-12-19 | 2016-12-28 | 宁夏电力公司中卫供电局 | SF6 density monitor transmission test controls device |
-
1995
- 1995-03-03 JP JP06892495A patent/JP3172989B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101415079B1 (en) * | 2013-05-15 | 2014-07-17 | 주식회사 비츠로테크 | Appratus for diagnosing circuit breaker |
| CN104964815A (en) * | 2015-07-01 | 2015-10-07 | 许继（厦门）智能电力设备股份有限公司 | SF6 density relay pressure contact detecting device |
| CN107387386A (en) * | 2017-09-18 | 2017-11-24 | 马鞍山钢铁股份有限公司 | A kind of opening/closing condition detection method of thin oil pump drive motor main contactor |
| CN107387386B (en) * | 2017-09-18 | 2019-05-21 | 马鞍山钢铁股份有限公司 | A kind of opening/closing condition detection method of thin oil pump drive motor main contactor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3172989B2 (en) | 2001-06-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4835648A (en) | Gas insulated switchgear | |
| KR100639271B1 (en) | A method of discriminating between an internal arc and a circuit-breaking arc in a medium or high voltage circuit breaker | |
| KR20180008987A (en) | Apparatus and method for discriminating fault in gas insulated switchgear system | |
| US4709291A (en) | Protective device for preventing blowout of bushing in high-voltage switching installation | |
| JP3172989B2 (en) | Gas circuit breaker failure detection device | |
| US6373669B1 (en) | Process and arrangement for selective network monitoring for switchgear | |
| KR100692586B1 (en) | Trouble diagnosis method and system for circuit breaker | |
| JP3172988B2 (en) | Gas circuit breaker failure detection device | |
| JP3172987B2 (en) | Gas circuit breaker failure detection device | |
| JPH08235976A (en) | Failure detecting device of gas blast circuit-breaker | |
| JPH07227018A (en) | Device for detecting faulty compartment of gas-insulated switchgear | |
| KR101602060B1 (en) | Apparatus and method for detecting fault point using protection relay | |
| JP2956438B2 (en) | Detecting unit for failure zone of gas insulated switchgear | |
| JP3254707B2 (en) | Gas pressure monitoring equipment for gas insulation equipment | |
| JP2956446B2 (en) | Detecting unit for failure zone of gas insulated switchgear | |
| JPH08279417A (en) | Detecting device of fault of gas insulated electric apparatus | |
| JPH06105425A (en) | Gas insulated switch | |
| JPH0879965A (en) | Method for locating accident point of gas insulated switchgear | |
| JP2002281621A (en) | Locating apparatus for accident point | |
| JPH0716514U (en) | Gas insulated switchgear Accident section detection device | |
| JPH0850160A (en) | Standardizing method of locating accident point for gas insulation switchgear | |
| JPH01234016A (en) | System for determining position of abnormality of gas insulated apparatus | |
| JPH0819133A (en) | Supervisory device for gas insulated switchgear | |
| JPH06201752A (en) | Gas pressure monitoring device with accident point locating function | |
| JPH0246114A (en) | Method of locating fault point of gas insulated |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080330 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090330 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090330 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100330 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100330 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110330 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110330 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120330 Year of fee payment: 11 |
|
| LAPS | Cancellation because of no payment of annual fees |