JPH0879965A - Method for locating accident point of gas insulated switchgear - Google Patents
Method for locating accident point of gas insulated switchgearInfo
- Publication number
- JPH0879965A JPH0879965A JP6211324A JP21132494A JPH0879965A JP H0879965 A JPH0879965 A JP H0879965A JP 6211324 A JP6211324 A JP 6211324A JP 21132494 A JP21132494 A JP 21132494A JP H0879965 A JPH0879965 A JP H0879965A
- Authority
- JP
- Japan
- Prior art keywords
- ground fault
- gas
- accident
- detection mode
- short
- 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.)
- Withdrawn
Links
Landscapes
- Locating Faults (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
Description
【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開閉装置の事故点を標定する事故点
標定方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fault point locating method for locating a fault point of a gas insulated switchgear used in a power receiving and transforming facility.
【０００２】[0002]
【従来の技術】複数のガス区分を有するガス絶縁開閉装
置において事故が生じたときには、いずれのガス区分で
事故が生じたのかを速やかに標定して、機器の早期復旧
に努める必要がある。2. Description of the Related Art When an accident occurs in a gas-insulated switchgear having a plurality of gas sections, it is necessary to promptly identify in which gas section the accident has occurred and to make an early recovery of the equipment.
【０００３】複数のガス区分を有するガス絶縁開閉装置
において、いずれかのガス区分で地絡事故または短絡事
故が生じると、その事故に伴って生じるアークによりそ
のガス区分の圧力が上昇する。従って、地絡事故または
短絡事故の発生が検知されたときに、各ガス区分の圧力
上昇の有無を見ることにより、事故が生じたガス区分を
特定することができる。In a gas-insulated switchgear having a plurality of gas sections, when a ground fault or short-circuit accident occurs in any of the gas sections, the arc of the gas increases the pressure of the gas section. Therefore, when the occurrence of a ground fault accident or a short-circuit accident is detected, it is possible to identify the gas segment in which the accident has occurred by checking whether or not the pressure in each gas segment has risen.
【０００４】従来の事故点標定方法において、地絡事故
の事故点を標定する場合には、地絡事故時に生じる母線
の零相電圧の上昇を地絡過電圧継電器により検出して、
該地絡過電圧継電器が検出動作を行なったときに各ガス
区分のガス圧力の演算を開始し、地絡によるガス圧力の
上昇が検出されたガス区分を事故点として標定するよう
にしている。In the conventional fault point locating method, when locating the fault point of the ground fault, the rise of the zero-phase voltage of the bus bar caused by the ground fault is detected by the ground fault overvoltage relay,
When the ground fault overvoltage relay performs the detection operation, the calculation of the gas pressure of each gas segment is started, and the gas segment in which the increase in the gas pressure due to the ground fault is detected is located as the accident point.
【０００５】また短絡事故の事故点を標定する場合に
は、常時の圧力演算により圧力上昇が検出されたときに
同時に不足電圧継電器が検出動作を行なったときに、ガ
ス圧力の上昇が検出されたガス区分を事故点として標定
するようにしている。In the case of locating a fault point of a short circuit accident, when the pressure rise is detected by the constant pressure calculation, the rise of the gas pressure is detected at the same time when the undervoltage relay performs the detection operation. The gas category is determined as the accident point.
【０００６】図１は受電設備に用いられているガス絶縁
開閉装置の構成の一例を示したもので、この例では、負
荷側につながる送電線Ｌを構成するケーブルを接続する
ケーブルヘッドＣＨｄと線路側断路器ＤＳ1 とが共通の
容器１内に収納されてケーブルヘッド断路器ユニットＵ
1 が構成され、遮断器ＣＢが容器２内に収納されて遮断
器ユニットＵ2 が構成されている。また母線ＢＵＳを構
成する導体ｂｓ1 と断路器ＤＳ2 とが容器３内に収納さ
れて母線断路器ユニットＵ3 が構成され、母線ＢＵＳを
構成する導体ｂs2及びｂs3がそれぞれ容器４及び５内に
収納されて母線ユニットＵ4 及びＵ5 が構成されてい
る。容器１ないし５内にはＳＦ6 ガスが所定の圧力で封
入され、ユニットＵ1 〜Ｕ5 がそれぞれ独立のガス区分
を構成している。FIG. 1 shows an example of the structure of a gas-insulated switchgear used in a power receiving facility. In this example, a cable head CHd for connecting a cable constituting a power transmission line L connected to the load side and a line. The cable disconnector unit U is accommodated in the common container 1 together with the side disconnector DS1.
1 and the circuit breaker CB is housed in the container 2 to form a circuit breaker unit U2. In addition, the conductor bs1 and the disconnector DS2 forming the busbar BUS are housed in the container 3 to form the busbar disconnector unit U3, and the conductors bs2 and bs3 forming the busbar BUS are housed in the containers 4 and 5, respectively. Busbar units U4 and U5 are constructed. SF 6 gas is enclosed in the containers 1 to 5 at a predetermined pressure, and the units U1 to U5 form independent gas sections.
【０００７】Ｐ1 〜Ｐ5 はそれぞれ容器１〜５内のガス
圧力を検出する圧力センサで、これらの圧力センサの出
力は、事故点標定部１０に入力されている。また母線Ｂ
ＵＳに母線側計器用変圧器ＧＰＴが接続され、この計器
用変圧器の出力が地絡過電圧継電器（ＯＶＧ）６及び不
足電圧継電器（ＵＶ）７に入力されている。これらの継
電器の出力も事故点標定部１０に入力されている。P1 to P5 are pressure sensors for detecting the gas pressure in the containers 1 to 5, respectively, and the outputs of these pressure sensors are input to the accident point locating section 10. Bus B
The bus side instrument transformer GPT is connected to the US, and the output of the instrument transformer is input to the ground fault overvoltage relay (OVG) 6 and the undervoltage relay (UV) 7. The outputs of these relays are also input to the fault point locating unit 10.
【０００８】事故点標定部１０は、ガス圧力センサＰ1
〜Ｐ5 の出力を入力として、容器１ないし５内のガス圧
力の規定時間前の圧力からの上昇分を圧力上昇ΔＰとし
て演算するガス圧力演算部と、演算された圧力上昇ΔＰ
が所定の判定基準に合致しているか否かを判定して事故
点を判定する事故点判定部とを備えている。The accident point locating unit 10 is equipped with a gas pressure sensor P1.
To P5 as an input, a gas pressure calculation unit for calculating the increase in the gas pressure in the containers 1 to 5 from the pressure before the specified time as a pressure increase ΔP, and the calculated pressure increase ΔP
And an accident point determining unit for determining an accident point by determining whether or not the predetermined point meets a predetermined determination criterion.
【０００９】図１においてガス絶縁開閉装置ＧＩＳ内ま
たは送電線Ｌで地絡事故が生じると、母線ＢＵＳの零相
電圧が上昇する。この母線零相電圧の上昇は、母線側計
器用変圧器ＧＰＴの出力を入力とする地絡過電圧継電器
（ＯＶＧ）６により検出される。事故点標定部１０に設
けられたガス圧力演算部は、母線零相電圧の上昇の検出
を起動条件として、圧力センサＰ1 〜Ｐ5 の出力から容
器１ないし５内の圧力上昇（規定時間前の圧力からの上
昇分）ΔＰを演算する。事故点判定部は、地絡判定用の
判定基準に適合する圧力上昇ΔＰが生じている（圧力上
昇が所定の判定基準を超えている）ガス区分があるとき
に、そのガス区分を地絡事故点として標定する。In FIG. 1, when a ground fault occurs in the gas insulated switchgear GIS or in the transmission line L, the zero-phase voltage of the bus BUS rises. This rise in the bus zero-phase voltage is detected by a ground fault overvoltage relay (OVG) 6 that receives the output of the bus side instrument transformer GPT as an input. The gas pressure computing unit provided in the accident point locating unit 10 uses the output of the pressure sensors P1 to P5 to increase the pressure in the container 1 to 5 (pressure before the specified time) with the detection of the increase in the bus zero-phase voltage as a starting condition. (Amount of increase from) ΔP is calculated. When there is a gas section in which a pressure increase ΔP that meets the judgment standard for ground fault judgment has occurred (the pressure increase exceeds a predetermined judgment standard), the accident point judgment unit sets the gas classification to a ground fault. Orient as a point.
【００１０】ＧＩＳの内部で短絡事故が発生したときに
は、母線電圧の低下を不足電圧継電器７により検出して
その発生を検知する。ガス圧力演算部では、圧力センサ
Ｐ1〜Ｐ5 の出力から容器１ないし５内の圧力上昇ΔＰ
を演算する。事故点標定部１０内の事故点判定部では、
短絡判定用の判定基準に適合する圧力上昇ΔＰが生じた
ガス区分があるときにそのガス区分を短絡事故点として
標定する。When a short-circuit accident occurs inside the GIS, the undervoltage relay 7 detects a drop in the bus voltage and detects the occurrence. In the gas pressure calculation unit, the pressure increase ΔP in the containers 1 to 5 is calculated from the outputs of the pressure sensors P1 to P5.
Is calculated. In the accident point determination section in the accident point location section 10,
When there is a gas section that has a pressure increase ΔP that meets the judgment criteria for short-circuit judgment, that gas section is located as the short-circuit fault point.
【００１１】地絡事故が生じた場合のアーク電流は比較
的小さいため、地絡事故が生じたガス区分で生じるガス
圧力の上昇は僅かである。これに対し、短絡事故が生じ
たときには大きなアーク電流が流れるため、短絡事故が
生じたガス区分ではガス圧力が大きく上昇する。Since the arc current when a ground fault occurs is relatively small, the gas pressure rise in the gas section where the ground fault occurs is small. On the other hand, when a short-circuit accident occurs, a large arc current flows, so that the gas pressure greatly increases in the gas section where the short-circuit accident occurs.
【００１２】従って、ガス絶縁開閉装置の事故点を標定
する場合には、地絡事故が生じた場合と、短絡事故が生
じた場合とで圧力上昇の判定基準を異ならせて、事故の
検出感度を異ならせる必要がある。そのため、従来のガ
ス絶縁開閉装置の事故点標定方法では、地絡事故が生じ
たことが検出されたときに、圧力上昇に対する判定基準
を低く設定して高感度で各ガス区分での事故の有無を検
出する地絡検出モードを行なわせ、短絡事故の発生が検
出されたときには、圧力上昇に対する判定基準を地絡検
出モードよりも高く設定して、地絡検出モードよりも低
感度で各ガス区分での事故の有無を検出する短絡検出モ
ードを行なわせるようにしている。Therefore, when locating the accident point of the gas-insulated switchgear, the pressure rise judgment criterion is made different depending on whether a ground fault accident occurs or a short circuit accident occurs, and the accident detection sensitivity is increased. Need to be different. Therefore, in the conventional fault location method for gas insulated switchgear, when it is detected that a ground fault has occurred, the judgment standard for pressure rise is set low and the presence or absence of an accident in each gas category is highly sensitive. When a short-circuit accident is detected, the judgment criteria for pressure rise are set higher than the ground fault detection mode, and each gas category has lower sensitivity than the ground fault detection mode. The short-circuit detection mode, which detects the presence or absence of an accident, is performed.
【００１３】[0013]
【発明が解決しようとする課題】従来の事故点標定方法
では、送電線で地絡から短絡に移行する事故が生じた場
合に、短絡電流を正常に遮断した遮断器が配置されてい
るガス区分での圧力上昇を誤って地絡事故による圧力上
昇であると誤判定するおそれがあった。In the conventional fault point locating method, in the case of an accident in which a ground fault is transferred to a short circuit in a transmission line, a gas section in which a circuit breaker that normally interrupts the short circuit current is arranged is arranged. There was a risk of erroneously deciding that the pressure increase at the station was due to a ground fault accident.
【００１４】例えば、図１のガス絶縁開閉装置におい
て、送電線ＬのＡ点で地絡から短絡に進展する事故が生
じたとする。このとき事故点標定部１０は、地絡事故が
発生した時点で検出モードを地絡検出モードとして、各
ガス区分での事故の有無を判定するためのデータ処理を
開始する。その後短絡事故に移行しても、事故点標定部
１０は、地絡検出モードでデータの処理を続けるため、
遮断器ＣＢが短絡電流を正常に遮断したときに該遮断器
ＣＢから生じる発熱により容器２内で僅かな圧力上昇が
生じると、その圧力上昇を事故と判定してしまい、容器
２内で地絡事故が生じたと誤標定するおそれがある。For example, in the gas-insulated switchgear of FIG. 1, it is assumed that an accident at a point A of the power transmission line L progresses from a ground fault to a short circuit. At this time, the accident point locating unit 10 sets the detection mode to the ground fault detection mode at the time of occurrence of the ground fault and starts data processing for determining the presence or absence of the accident in each gas segment. Even after the transition to the short-circuit accident, the accident point locator unit 10 continues to process the data in the ground fault detection mode.
When the circuit breaker CB normally interrupts the short-circuit current, if a slight pressure increase occurs in the container 2 due to the heat generated from the circuit breaker CB, the pressure increase is determined to be an accident, and the ground fault occurs in the container 2. There is a risk of misidentifying that an accident has occurred.
【００１５】上記のような誤標定を防止するため、送電
線で生じた地絡事故が短絡事故に進展した際の母線の線
間電圧の低下を不足電圧継電器７により検出して、該継
電器７が検出動作を行なったときに検出モードを短絡検
出モードに切り換えるようにすることが考えられる。In order to prevent the erroneous location as described above, the undervoltage relay 7 detects a drop in the line voltage of the bus when a ground fault occurring in the transmission line progresses into a short-circuit fault, and the relay 7 is detected. It is conceivable to switch the detection mode to the short-circuit detection mode when the detection operation is performed by.
【００１６】しかしながら、このような方法をとった場
合には、母線ＢＵＳが配置されているガス区分で生じた
地絡事故を適確に標定することができなくなる。例えば
図１のＢ点で地絡事故が生じると、図示しない母線保護
用継電器が検出動作を行なって遮断器ＣＢを開くため、
母線ＢＵＳ全体が停電し、母線ＢＵＳの線間電圧が零に
なる。これを受けて、事故点標定部１０は低感度の短絡
検出モードに切り換わるため、Ｂ点での地絡事故を標定
することができなくなる。However, when such a method is adopted, it becomes impossible to accurately locate the ground fault occurring in the gas section where the bus BUS is arranged. For example, when a ground fault occurs at point B in FIG. 1, a busbar protection relay (not shown) performs a detection operation to open the circuit breaker CB.
The entire bus BUS loses power and the line voltage of the bus BUS becomes zero. In response to this, the accident point locating unit 10 switches to the low-sensitivity short-circuit detection mode, so that the ground fault at point B cannot be located.
【００１７】本発明の目的は、送電線で地絡から短絡に
進展する事故が生じた場合に、遮断器が配置されたガス
区分を地絡事故点として誤標定するおそれをなくし、ま
た母線部分での地絡事故点の標定を確実に行なわせるこ
とができるようにして、信頼性を向上させたガス絶縁開
閉装置の事故点標定方法を提供することにある。An object of the present invention is to eliminate the risk of erroneously locating the gas section in which the circuit breaker is arranged as a ground fault point when an accident occurs in which a ground fault develops into a short circuit in the power transmission line, and also the busbar portion. (EN) A method for locating a fault point of a gas-insulated switchgear, which is capable of reliably locating a ground fault accident point in, and has improved reliability.
【００１８】[0018]
【課題を解決するための手段】本発明は、母線を構成す
る導体と、送電線と母線との間を開閉する遮断器を含む
開閉回路の構成機器とを複数の容器内に振り分けて収納
し、該複数の容器を複数のガス区分を構成するように接
続したガス絶縁開閉装置において、地絡事故の発生が検
出されたときには各ガス区分の所定の圧力上昇の有無を
高感度で検出して所定の圧力上昇が生じたガス区分を地
絡事故点と標定する地絡検出モードを行わせ、短絡事故
の発生が検出されたときには、地絡検出モードにおける
検出感度よりも低い検出感度で各ガス区分の所定の圧力
上昇の有無を検出して所定の圧力上昇が生じたガス区分
を短絡事故点と標定する短絡検出モードを行わせて事故
点を標定するガス絶縁開閉装置の事故点標定方法に係わ
るものである。SUMMARY OF THE INVENTION According to the present invention, a conductor forming a bus bar and a component of a switching circuit including a circuit breaker for opening and closing between a transmission line and the bus bar are distributed and housed in a plurality of containers. In a gas insulated switchgear in which the plurality of containers are connected to form a plurality of gas sections, when the occurrence of a ground fault is detected, the presence or absence of a predetermined pressure increase in each gas section is detected with high sensitivity. When the ground fault detection mode that locates the gas category where the predetermined pressure rise occurs as the ground fault accident point is performed, and when the occurrence of a short circuit accident is detected, each gas is detected with a detection sensitivity lower than that in the ground fault detection mode. Detecting the presence or absence of a prescribed pressure rise in a segment and locating the gas segment in which a prescribed pressure rise has occurred as a short-circuit fault point It is related.
【００１９】本発明においては、母線の地絡事故を検出
する母線保護用継電器の動作時間と該母線保護用継電器
により遮断指令が与えられたときの遮断器の開極時間と
の和に相当する時間を判定基準時間Ｔ、発生した地絡事
故が短絡事故に移行する場合の地絡事故の継続時間を地
絡継続時間ｔ、前記送電線で２相短絡または３相短絡事
故が生じたときに生じるアークのアーク電圧を判定基準
電圧Ｖarc とする。そして地絡事故の発生が検出された
時、事故点標定装置は、地絡検出モードを開始し、該地
絡事故の地絡継続時間ｔが判定基準時間Ｔよりも短いこ
とが検出されたとき（判定基準時間Ｔが経過する前に短
絡事故の発生が検出されたとき）、及び地絡継続時間ｔ
が判定基準時間Ｔ以上であって、かつ母線の線間電圧Ｅ
が判定基準電圧Ｖarc 以上であることが検出されたとき
（母線保護用継電器の保護範囲外で発生した地絡事故
が、判定基準時間Ｔが経過した後に短絡事故に移行した
ことが検出されたとき）には検出モードを地絡検出モー
ドから短絡検出モードに切り換え、該地絡事故の地絡継
続時間ｔが判定基準時間Ｔ以上であって、かつ母線の線
間電圧Ｅが判定基準電圧Ｖarc よりも低いことが検出さ
れたとき（母線で地絡事故が生じ、母線保護用継電器が
動作して遮断器が開き、母線が停電したとき）には検出
モードを地絡検出モードのままに保持するようにした。In the present invention, it corresponds to the sum of the operating time of the busbar protection relay for detecting the ground fault of the busbar and the contact opening time of the circuit breaker when a disconnection command is given by the busbar protection relay. The time is a judgment reference time T, the duration of the ground fault when the generated ground fault is transferred to the short-circuit fault is the ground fault continuation time t, when a two-phase short circuit or a three-phase short circuit fault occurs in the transmission line. The arc voltage of the generated arc is used as the judgment reference voltage Varc. When the occurrence of the ground fault accident is detected, the accident point locating device starts the ground fault detection mode, and when it is detected that the ground fault continuation time t of the ground fault accident is shorter than the determination reference time T. (When the occurrence of a short circuit accident is detected before the judgment reference time T elapses), and the ground fault continuation time t
Is the judgment reference time T or more and the line voltage E of the bus bar
Is detected to be equal to or higher than the judgment reference voltage Varc (when it is detected that a ground fault that has occurred outside the protection range of the bus-barrier relay has shifted to a short-circuit accident after the judgment reference time T has elapsed). ), The detection mode is switched from the ground fault detection mode to the short circuit detection mode, the ground fault continuation time t of the ground fault is equal to or longer than the judgment reference time T, and the line voltage E of the busbar is larger than the judgment reference voltage Varc. If it is detected to be low (when a ground fault occurs on the bus, the relay for relay protection operates, the circuit breaker opens, and the bus breaks), the detection mode is maintained as the ground fault detection mode. I did it.
【００２０】なお本発明において、母線保護用継電器の
動作時間とは、母線で地絡事故が生じてから該継電器が
検出動作を行なう（遮断指令を発生する）までの時間を
意味する。また遮断器の開極時間とは、母線保護継電器
が検出動作を行なって遮断器に遮断指令が与えられてか
ら該遮断器が開くまでの時間を意味する。In the present invention, the operating time of the busbar protection relay means the time from the occurrence of a ground fault on the busbar to the detection operation (generation of a shutoff command) of the relay. Further, the contact opening time of the circuit breaker means the time from when the busbar protection relay performs the detection operation and when the circuit breaker is given a breaking command until the circuit breaker opens.
【００２１】本発明を適用するガス絶縁開閉装置におい
て、ガス区分の数と容器の数とは一致していなくても良
い。即ち、隣り合う一部の容器が共通のガス区分を構成
するように接続されていてもよい。In the gas insulated switchgear to which the present invention is applied, the number of gas sections and the number of containers may not be the same. That is, some adjacent containers may be connected so as to form a common gas section.
【００２２】[0022]
【作用】本発明の事故点標定方法を適用するガス絶縁開
閉装置において、送電線で地絡事故から短絡事故に移行
する事故が発生した場合を考える。このとき例えば母線
の零相電圧の上昇により地絡事故の発生が検出されるた
め、検出モードは地絡検出モードとなる。この地絡検出
モードでは、各ガス区分の圧力上昇ΔＰの判定基準を低
く設定して、事故が生じたガス区分の有無の検出を高感
度で行う。本発明においては、この地絡検出モードを行
っているときに、地絡継続時間ｔが判定基準時間Ｔに達
する前に地絡事故が短絡事故に進展した場合に、検出モ
ードを検出感度が高い地絡検出モードから検出感度が低
い短絡検出モードに切り換える。従って、遮断器が短絡
電流を遮断する正常な遮断動作を行った際にその温度が
上昇して該遮断器が配置されたガス区分で地絡事故時と
同程度の圧力上昇が生じた場合に、該ガス区分が事故点
として誤標定されるのを防ぐことができる。In the gas-insulated switchgear to which the accident point locating method of the present invention is applied, consider a case in which a fault occurs in a transmission line, which shifts from a ground fault to a short circuit. At this time, for example, the occurrence of the ground fault is detected by the rise of the zero-phase voltage of the bus bar, so the detection mode becomes the ground fault detection mode. In this ground fault detection mode, the determination criterion for the pressure increase ΔP of each gas segment is set low, and the presence or absence of the gas segment in which the accident has occurred is detected with high sensitivity. In the present invention, when the ground fault detection mode is performed, if the ground fault accident progresses into a short circuit accident before the ground fault continuation time t reaches the determination reference time T, the detection sensitivity of the detection mode is high. Switch from the ground fault detection mode to the short-circuit detection mode with low detection sensitivity. Therefore, when the circuit breaker performs a normal breaking operation to cut off the short-circuit current, its temperature rises and a pressure rise occurs in the gas section where the circuit breaker is arranged to the same extent as when a ground fault occurs. Therefore, it is possible to prevent the gas classification from being erroneously determined as an accident point.
【００２３】また上記のガス絶縁開閉装置において、母
線で地絡事故が生じたとする。このとき母線保護用継電
器が動作し、母線での地絡事故発生後判定基準時間Ｔが
経過した時に遮断器が開かれるが、遮断器が開かれると
当然母線の線間電圧Ｅは判定基準電圧（送電線で２相短
絡または３相短絡が生じた場合のアーク電圧）Ｖarcよ
りも低くなる（Ｅ＜Ｖarc となる）ため、検出モードは
地絡検出モードのままに保持される。そのため、母線の
地絡箇所の標定を支障なく行なわせることができる。In the gas insulated switchgear described above, assume that a ground fault occurs on the bus bar. At this time, the busbar protection relay operates, and the circuit breaker is opened when the judgment reference time T elapses after the occurrence of the ground fault on the busbar. However, when the circuit breaker is opened, the line voltage E of the busbar is naturally the judgment reference voltage. (The arc voltage when a two-phase short circuit or a three-phase short circuit occurs in the power transmission line) is lower than Varc (E <Varc), so that the detection mode is maintained in the ground fault detection mode. Therefore, it is possible to locate the ground fault portion of the busbar without any trouble.
【００２４】次に送電線で地絡事故が発生して、該地絡
事故が判定基準時間Ｔ以上継続した後、２相短絡または
３相短絡に移行したとする。この場合にも母線の線間電
圧Ｅが低下するが、このときの母線の線間電圧Ｅは、判
定基準電圧（送電線で２相短絡または３相短絡が生じた
場合のアーク電圧）Ｖarc よりは低くならない（Ｅ≧Ｖ
arc である）ため、検出モードは地絡検出モードから短
絡検出モードに切り換えられる。従って、送電線での事
故が短絡事故に移行した後、遮断器が事故電流を遮断す
る正常な遮断動作を行った際に、該遮断器が配置されて
いるガス区分で地絡事故時と同程度の圧力上昇が生じた
としても、その圧力上昇は事故とは判定されず、遮断器
が配置されたガス区分を事故点とする誤標定が防止され
る。Next, it is assumed that a ground fault has occurred in the power transmission line, and the ground fault has continued for the judgment reference time T or longer, and then transitions to a two-phase short circuit or a three-phase short circuit. In this case as well, the line voltage E of the bus decreases, but the line voltage E of the bus at this time is determined by the judgment reference voltage (arc voltage when a two-phase short circuit or a three-phase short circuit occurs in the transmission line) Varc. Does not become low (E ≧ V
Therefore, the detection mode is switched from the ground fault detection mode to the short circuit detection mode. Therefore, after the accident in the power transmission line is transferred to the short-circuit accident, when the circuit breaker performs the normal breaking operation to cut off the fault current, the gas section in which the circuit breaker is placed is the same as that at the time of the ground fault. Even if the pressure rises to a certain degree, the pressure rise is not judged to be an accident, and erroneous location with the gas section where the circuit breaker is arranged as the accident point is prevented.
【００２５】[0025]
【実施例】本実施例では、図１に示したガス絶縁開閉装
置ＧＩＳに本発明の事故点標定方法を適用するものとす
る。同図に示されたガス絶縁開閉装置の構成は既に説明
した通りで、同図においてＣＨｄは、負荷側につながる
送電線Ｌを構成するケーブルを引き込む線路引込み手段
としてのケーブルヘッド、ＤＳ1 はケーブルヘッドＣＨ
ｄに一端が接続された線路側断路器、ＣＢは断路器ＤＳ
1 の他端に一端が接続されたガス遮断器、ＢＵＳは母線
側断路器ＤＳ2 を介して遮断器ＣＢ1 の他端に接続され
た母線、ＧＰＴは母線ＢＵＳに接続されたガス絶縁計器
用変圧器である。ケーブルヘッドＣＨｄと線路側断路器
ＤＳ1 とが共通の容器１内に収納されてケーブルヘッド
断路器ユニットＵ1 が構成され、遮断器ＣＢが容器２内
に収納されて遮断器ユニットＵ2 が構成されている。ま
た母線ＢＵＳを構成する導体ｂｓ1 と断路器ＤＳ2 とが
容器３内に収納されて母線断路器ユニットＵ3 が構成さ
れ、母線ＢＵＳを構成する導体ｂs2及びｂs3がそれぞれ
容器４及び５内に収納されて母線ユニットＵ4 及びＵ5
が構成されている。EXAMPLE In this example, the accident location method of the present invention is applied to the gas-insulated switchgear GIS shown in FIG. The structure of the gas-insulated switchgear shown in the same figure has already been described. In the figure, CHd is a cable head as a line drawing means for drawing in the cable forming the transmission line L connected to the load side, and DS1 is a cable head. CH
Line side disconnector with one end connected to d, CB is disconnector DS
A gas circuit breaker with one end connected to the other end of 1, BUS is a busbar connected to the other end of circuit breaker CB1 via a busbar disconnector DS2, and GPT is a gas-insulated instrument transformer connected to the busbar BUS Is. The cable head CHd and the line-side disconnector DS1 are housed in a common container 1 to form a cable head disconnector unit U1, and the circuit breaker CB is housed in a container 2 to form a circuit breaker unit U2. . In addition, the conductor bs1 and the disconnector DS2 forming the busbar BUS are housed in the container 3 to form the busbar disconnector unit U3, and the conductors bs2 and bs3 forming the busbar BUS are housed in the containers 4 and 5, respectively. Bus units U4 and U5
Is configured.
【００２６】ユニットＵ1 〜Ｕ5 のそれぞれの容器１な
いし５は絶縁スペーサを介して相互に接続され、ユニッ
トＵ1 〜Ｕ5 がそれぞれ独立のガス区分を構成してい
る。The respective containers 1 to 5 of the units U1 to U5 are connected to each other via insulating spacers, and the units U1 to U5 form independent gas sections.
【００２７】容器１〜５には、それぞれの内部のガス圧
力を検出する圧力センサＰ1 〜Ｐ5が取り付けられ、こ
れらの圧力センサの出力が、事故点標定部１０に入力さ
れている。また母線側計器用変圧器ＧＰＴの出力が地絡
過電圧継電器（ＯＶＧ）６及び不足電圧継電器（ＵＶ）
７に入力され、これらの継電器の出力が事故点標定部１
０に入力されている。Pressure sensors P1 to P5 for detecting the internal gas pressures of the respective containers 1 to 5 are attached, and the outputs of these pressure sensors are input to the accident point locating section 10. In addition, the output of the transformer GPT for the bus side is the ground fault overvoltage relay (OVG) 6 and the undervoltage relay (UV).
7 and the output of these relays is the fault point locator 1
0 has been entered.
【００２８】ガス遮断器ＣＢは、固定接触子及び可動接
触子と適宜の消弧機構とを備えた遮断部をＳＦ6 ガスが
封入された容器内に収納したもので、この遮断器ＣＢ
は、送電線Ｌまたはガス絶縁開閉装置ＧＩＳ内で地絡事
故または短絡事故が生じたとき、及びガス絶縁開閉装置
の母線ＢＵＳで地絡事故または短絡事故が生じて母線保
護用継電器が検出動作を行ったときに遮断指令が与えら
れて遮断する。The gas circuit breaker CB comprises a circuit breaker equipped with a fixed contact, a movable contact, and an appropriate arc extinguishing mechanism, which is housed in a container filled with SF 6 gas.
When the ground fault or the short circuit accident occurs in the transmission line L or the gas insulated switchgear GIS, and the bus fault BUS of the gas insulated switchgear causes the ground fault or the short circuit accident, the relay for protecting the busbar detects the detection operation. When it is done, a cutoff command is given to cut off.
【００２９】事故点標定部１０は、従来のものと同様
に、ガス圧力センサＰ1 〜Ｐ5 の出力を入力として、容
器１ないし５内のガス圧力の規定時間前の圧力からの上
昇分を圧力上昇ΔＰとして演算するガス圧力演算部と、
演算された圧力上昇ΔＰが所定の判定基準に合致してい
るか否かを判定して事故点を判定する事故点判定部とを
備えている。The accident point locating unit 10 receives the outputs of the gas pressure sensors P1 to P5 as input, and increases the gas pressure in the containers 1 to 5 from the pressure before the specified time, as in the conventional case. A gas pressure calculation unit that calculates as ΔP,
An accident point determination unit that determines whether or not the calculated pressure increase ΔP matches a predetermined determination criterion to determine an accident point is provided.
【００３０】本発明の事故点標定方法においても、各ガ
ス区分の圧力上昇の判定基準を低く設定して判定基準に
適合する圧力上昇が生じたガス区分の有無を高感度で検
出する地絡検出モードと、各ガス区分の圧力上昇の判定
基準を地絡検出モードにおける判定基準よりも高く設定
して判定基準に適合する圧力上昇が生じたガス区分の有
無を地絡検出モードよりも低感度で検出する短絡検出モ
ードとを行い得るようにしておいて、地絡事故の発生が
検出されたときに地絡検出モードを行わせ、短絡事故の
発生が検出されたときに短絡検出モードを行わせる。地
絡事故の発生は母線ＢＵＳの零相電圧の上昇により検出
することができ、短絡事故の発生は母線ＢＵＳの線間電
圧の低下により検出することができる。Also in the accident point locating method of the present invention, the ground fault detection is performed with a high sensitivity to detect the presence or absence of the gas segment in which the pressure rise conforming to the criterion is set by setting the criterion for the pressure rise of each gas segment low. Mode and the judgment criteria for the pressure rise of each gas section are set higher than the judgment criteria in the ground fault detection mode, and the presence or absence of the gas section in which the pressure rise that meets the judgment criteria has occurred is less sensitive than the ground fault detection mode. The short-circuit detection mode for detecting is performed so that the ground-fault detection mode is executed when the occurrence of the ground-fault accident is detected, and the short-circuit detection mode is executed when the occurrence of the short-circuit accident is detected. . The occurrence of the ground fault can be detected by the increase of the zero-phase voltage of the bus BUS, and the occurrence of the short circuit can be detected by the decrease of the line voltage of the bus BUS.
【００３１】本発明においては、母線ＢＵＳの地絡事故
を検出する母線保護用継電器（図示せず。）の動作時間
と該母線保護用継電器により遮断指令が与えられたとき
の遮断器ＣＢの開極時間との和に相当する時間を判定基
準時間Ｔ、送電線Ｌで発生した地絡事故が短絡事故に移
行する場合の地絡事故の継続時間を地絡継続時間ｔ、送
電線Ｌで２相短絡または３相短絡事故が生じたときに生
じるアークのアーク電圧を判定基準電圧Ｖarc とし、地
絡検出モードを行っているときに、以下に示す状況が検
出されたときに検出モードの切り替えまたは保持を行わ
せる。In the present invention, the operating time of the busbar protective relay (not shown) for detecting a ground fault on the busbar BUS and the opening of the circuit breaker CB when a disconnection command is given by the busbar protective relay. The time equivalent to the sum of the polar time is the judgment reference time T, and the duration of the ground fault when the ground fault that occurs on the power transmission line L shifts to a short-circuit fault is the ground fault duration t and the power transmission line L is 2 The arc voltage of the arc generated when a phase short circuit or a three-phase short circuit accident occurs is used as the judgment reference voltage Varc, and when the ground fault detection mode is performed, the detection mode is switched or the following conditions are detected. Hold it.
【００３２】（ａ）ｔ＜Ｔであることが検出されたとき
（判定基準時間Ｔが経過する前に地絡事故が短絡事故に
移行した場合）。(A) When it is detected that t <T (when the ground fault accident shifts to the short circuit accident before the judgment reference time T elapses).
【００３３】このとき出モードを地絡検出モードから短
絡検出モードに切り換える。At this time, the output mode is switched from the ground fault detection mode to the short circuit detection mode.
【００３４】（ｂ）ｔ≧Ｔであって、かつＥ＜Ｖarc で
あるとき（母線で地絡事故が生じて短絡事故に移行する
前に母線保護用継電器が動作し、遮断器が開いた場
合）。(B) When t ≧ T and E <Varc (when the busbar protection relay operates and the circuit breaker opens before the ground fault occurs in the busbar and the short-circuit fault occurs) ).
【００３５】このとき検出モードを地絡検出モードに保
持する。At this time, the detection mode is held in the ground fault detection mode.
【００３６】（ｃ）ｔ≧Ｔであって、かつＥ≧Ｖarc で
あるとき（母線保護用継電器の保護範囲外で発生した地
絡事故が判定基準時間Ｔ以上継続した後に短絡事故に移
行したことが検出されたとき）。(C) When t ≧ T and E ≧ Varc (a ground fault that has occurred outside the protection range of the bus-barrier relay has continued for a judgment reference time T or more, then a short-circuit fault has occurred). Is detected).
【００３７】このとき検出モードを地絡検出モードから
短絡検出モードに切り換える。At this time, the detection mode is switched from the ground fault detection mode to the short circuit detection mode.
【００３８】今図１のガス絶縁開閉装置において、送電
線ＬのＡ点で地絡から短絡に移行する事故が生じたとす
る。このとき母線の零相電圧の上昇により地絡事故の発
生が検出されるため、検出モードは地絡検出モードとな
る。地絡検出モードでは、各ガス区分の圧力上昇ΔＰの
判定基準を低く設定して、所定の圧力上昇ΔＰが生じた
ガス区分の有無を高感度で検出するためのデータ処理を
行う。It is now assumed that, in the gas-insulated switchgear shown in FIG. 1, an accident occurs at the point A of the power transmission line L, which shifts from a ground fault to a short circuit. At this time, the occurrence of the ground fault is detected due to the rise of the zero-phase voltage of the bus bar, so the detection mode is the ground fault detection mode. In the ground fault detection mode, the determination criterion for the pressure increase ΔP of each gas segment is set low, and data processing for highly sensitively detecting the presence or absence of the gas segment in which the predetermined pressure increase ΔP has occurred is performed.
【００３９】送電線ＬのＡ点で地絡事故が発生した後、
判定基準時間Ｔが経過する前に短絡事故に移行した場合
（ｔ＜Ｔの場合）には、検出感度が高い地絡検出モード
から、地絡検出モードよりも検出感度が低い短絡検出モ
ードに切り換えられる。その後遮断器ＣＢは短絡電流を
遮断するため、遮断器ＣＢの温度が上昇して該遮断器が
配置されたガス区分（容器２内）で圧力上昇が生じる
が、短絡検出モードでは地絡検出モードより検出感度が
低いため、遮断器ＣＢが配置されたガス区分での圧力上
昇を地絡事故と誤判定するおそれはない。After a ground fault occurs at point A of the transmission line L,
If the short-circuit accident occurs before the judgment reference time T elapses (when t <T), the ground fault detection mode with high detection sensitivity is switched to the short-circuit detection mode with lower detection sensitivity than the ground fault detection mode. To be Thereafter, the circuit breaker CB shuts off the short circuit current, so that the temperature of the circuit breaker CB rises and a pressure rise occurs in the gas section (in the container 2) in which the circuit breaker is arranged. Since the detection sensitivity is lower, there is no possibility of erroneously determining a pressure rise in the gas section in which the circuit breaker CB is arranged as a ground fault.
【００４０】なお、母線ＢＵＳで発生した地絡事故が、
判定基準時間Ｔが経過する前に短絡事故に移行した場合
には、短絡アークにより事故が生じたガス区分のガス圧
力が上昇するので、短絡検出モードで事故点を標定する
ことができる。In addition, the ground fault accident occurred on the bus BUS,
If the short-circuit accident occurs before the judgment reference time T elapses, the gas pressure of the gas section in which the accident has occurred due to the short-circuit arc rises, so that the accident point can be located in the short-circuit detection mode.
【００４１】また上記のガス絶縁開閉装置において、母
線ＢＵＳの例えばＢ点で地絡事故が生じたとすると、母
線保護用継電器が動作するため、母線での地絡事故発生
後判定基準時間Ｔが経過した時に遮断器ＣＢが開かれ
る。遮断器ＣＢが開かれると当然母線の線間電圧Ｅがア
ーク電圧Ｖarc よりも低くなる（Ｅ＜Ｖarc となる）。
本発明ではこのとき検出モードを地絡検出モードのまま
に保持するため、母線ＢＵＳの地絡箇所の標定を支障な
く行なわせることができる。Further, in the above gas-insulated switchgear, if a ground fault occurs at point B of the bus BUS, for example, the relay for protecting the bus operates, so the judgment reference time T after the occurrence of the ground fault on the bus has elapsed. When it does, the circuit breaker CB is opened. When the circuit breaker CB is opened, the line voltage E of the bus bar naturally becomes lower than the arc voltage Varc (E <Varc).
In the present invention, at this time, the detection mode is maintained as it is in the ground fault detection mode, so that the ground fault location of the bus BUS can be located without any trouble.
【００４２】次に送電線Ｌで地絡事故が発生して、該地
絡事故が判定基準時間Ｔ以上継続した後、２相短絡また
は３相短絡に移行したとする。この場合にも母線ＢＵＳ
の線間電圧Ｅが低下するが、このときの母線の線間電圧
Ｅは、判定基準電圧（送電線で２相短絡または３相短絡
が生じた場合のアーク電圧）Ｖarc よりは低くならない
（Ｅ≧Ｖarc である）。本発明ではこのとき検出モード
を地絡検出モードから短絡検出モードに切り換えるた
め、送電線での事故が短絡事故に移行した後、遮断器が
短絡電流を遮断する正常な遮断動作を行った際に、該遮
断器が配置されているガス区分で地絡事故時と同程度の
圧力上昇が生じたとしても、その圧力上昇は事故とは判
定されず、遮断器が配置されたガス区分を事故点とする
誤標定が行われるのか防止される。Next, assume that a ground fault occurs on the power transmission line L, and after the ground fault continues for the judgment reference time T or longer, a two-phase short circuit or a three-phase short circuit occurs. Also in this case the bus BUS
However, the line voltage E of the bus at this time does not become lower than the judgment reference voltage (arc voltage when a two-phase short circuit or a three-phase short circuit occurs in the transmission line) Varc (E ≧ Varc). In the present invention, since the detection mode is switched from the ground fault detection mode to the short-circuit detection mode at this time, after the accident in the power transmission line shifts to the short-circuit accident, when the circuit breaker performs the normal breaking operation of breaking the short-circuit current. Even if a pressure increase occurs in the gas section in which the circuit breaker is arranged to the same extent as in the case of a ground fault, the pressure increase is not judged to be an accident, and the gas section in which the circuit breaker is arranged has an accident point. It is prevented that the misorientation is performed.
【００４３】[0043]
【発明の効果】以上のように、本発明によれば、地絡か
ら短絡に移行する事故が生じた場合の地絡事故の継続時
間を地絡継続時間とし、母線で地絡事故が生じたときの
母線保護用継電器の動作時間と遮断器の開極時間との和
の時間を判定基準時間として、地絡継続時間が判定基準
時間よりも短いときに、検出モードを地絡検出モードか
ら短絡検出モードに切り換えて事故点の標定を行わせる
ようにしたので、遮断器が事故電流を遮断した際に生じ
る圧力上昇を事故と判定して、遮断器が配置されたガス
区分を事故点として誤標定するおそれをなくすことがで
きる。As described above, according to the present invention, the duration of a ground fault accident when a fault occurs from a ground fault to a short circuit is defined as the ground fault duration, and a ground fault occurs on the busbar. When the operating time of the busbar protection relay and the opening time of the breaker are used as the judgment reference time, the detection mode is short-circuited from the ground fault detection mode when the ground fault duration is shorter than the judgment reference time. By switching to the detection mode and locating the fault point, the pressure rise that occurs when the circuit breaker interrupts the fault current is determined to be an accident, and the gas category where the circuit breaker is placed is mistaken as the fault point. It is possible to eliminate the risk of orientation.
【００４４】また本発明によれば、送電線で２相短絡ま
たは３相短絡が生じたときのアーク電圧を判定基準電圧
として、地絡継続時間が判定基準時間以上で、かつ母線
の線間電圧が判定基準電圧よりも低い場合に、地絡検出
モードとするようにしたので、母線での地絡箇所の標定
を支障なく行わせることができる。Further, according to the present invention, the arc voltage when a two-phase short circuit or a three-phase short circuit occurs in the transmission line is used as the judgment reference voltage, the ground fault continuation time is the judgment reference time or more, and the line voltage of the busbar. When is lower than the determination reference voltage, the ground fault detection mode is set, so that the ground fault location on the bus bar can be located without any trouble.
【００４５】更に、本発明によれば、地絡継続時間が判
定基準時間以上で、かつ母線の線間電圧が判定基準電圧
以上であることが検出されたときに、検出モードを短絡
検出モードとするようにしたため、事故電流を遮断した
遮断器が配置されているガス区分を事故点とする誤標定
を防止することができる。Further, according to the present invention, when it is detected that the ground fault continuation time is equal to or longer than the judgment reference time and the line voltage of the bus bar is equal to or larger than the judgment reference voltage, the detection mode is set to the short circuit detection mode. By doing so, it is possible to prevent erroneous orientation in which the gas section in which the circuit breaker for interrupting the accident current is arranged is the accident point.
【図１】本発明の事故点標定方法を適用するガス絶縁開
閉装置の構成例を、本発明の方法を実施するために用い
る事故点標定装置の一部とともに示した構成図である。FIG. 1 is a configuration diagram showing a configuration example of a gas-insulated switchgear to which a fault locating method of the present invention is applied, together with a part of a fault locating device used for carrying out the method of the present invention.
ＧＩＳ ガス絶縁開閉装置 ＣＢ ガス遮断器 ＣＨｄ ケーブルヘッド ＤＳ1 線路側断路器 ＤＳ2 母線側断路器 Ｐ1 〜Ｐ5 圧力センサ １〜５ 容器 ６ 地絡過電圧継電器 ７ 不足電圧継電器 GIS Gas insulation switchgear CB Gas circuit breaker CHd Cable head DS1 Line side disconnector DS2 Bus side disconnector P1 to P5 Pressure sensor 1 to 5 Container 6 Ground fault overvoltage relay 7 Undervoltage relay
Claims (1)
線との間を開閉する遮断器を含む開閉回路の構成機器と
を複数の容器内に振り分けて収納し、該複数の容器を複
数のガス区分を構成するように接続したガス絶縁開閉装
置において、地絡事故の発生が検出されたときには各ガ
ス区分の所定の圧力上昇の有無を高感度で検出して所定
の圧力上昇が生じたガス区分を地絡事故点と標定する地
絡検出モードを行わせ、短絡事故の発生が検出されたと
きには、前記地絡検出モードにおける検出感度よりも低
い検出感度で各ガス区分の所定の圧力上昇の有無を検出
して所定の圧力上昇が生じたガス区分を短絡事故点と標
定する短絡検出モードを行わせて事故点を標定するガス
絶縁開閉装置の事故点標定方法であって、 前記母線の地絡事故を検出する母線保護用継電器の動作
時間と該母線保護用継電器により遮断指令が与えられた
ときの前記遮断器の開極時間との和に相当する時間を判
定基準時間Ｔ、発生した地絡事故が短絡事故に移行する
場合の地絡事故の継続時間を地絡継続時間ｔ、前記送電
線で２相短絡または３相短絡事故が生じたときに生じる
アークのアーク電圧を判定基準電圧Ｖarc とし、 地絡事故の発生が検出されたときに地絡検出モードを開
始し、該地絡事故の地絡継続時間ｔが判定基準時間Ｔよ
りも短いことが検出されたとき、及び該地絡継続時間ｔ
が判定基準時間Ｔ以上であって、かつ前記母線の線間電
圧Ｅが前記判定基準電圧Ｖarc 以上であることが検出さ
れたときには検出モードを地絡検出モードから短絡検出
モードに切り換え、 前記地絡事故の地絡継続時間ｔが判定基準時間Ｔ以上で
あって、かつ前記母線の線間電圧Ｅが前記判定基準電圧
Ｖarc よりも低いことが検出されたときには前記検出モ
ードを地絡検出モードのままに保持することを特徴とす
るガス絶縁開閉装置の事故点標定方法。1. A conductor constituting a bus bar and a component of a switching circuit including a circuit breaker for switching between a power transmission line and the bus bar are distributed and stored in a plurality of containers, and the plurality of containers are accommodated. In the gas-insulated switchgear connected so as to form the gas section, when the occurrence of a ground fault is detected, the presence or absence of a predetermined pressure increase in each gas section is detected with high sensitivity, and a predetermined pressure increase occurs. When the ground fault detection mode that locates the gas segment as the ground fault accident point is performed, and when the occurrence of a short-circuit accident is detected, the predetermined pressure rise of each gas segment with the detection sensitivity lower than the detection sensitivity in the ground fault detection mode. Is a gas insulation switchgear fault point locating method that locates the fault point by performing a short-circuit detection mode that detects the presence or absence of gas and locates the gas category where a predetermined pressure rise has occurred as a short-circuit fault point. Detect a ground fault The judgment reference time T is a time corresponding to the sum of the operating time of the line protection relay and the contact opening time of the circuit breaker when a disconnection command is given by the bus bar protection relay, and the ground fault that has occurred is a short circuit accident. The ground fault duration time t is the ground fault duration time, and the arc voltage of the arc generated when a two-phase short circuit or a three-phase short circuit fault occurs in the transmission line is the reference voltage Varc. When the occurrence of the ground fault is detected, the ground fault detection mode is started, and when it is detected that the ground fault continuation time t of the ground fault accident is shorter than the determination reference time T, and the ground fault continuation time t.
Is equal to or longer than the judgment reference time T and the line voltage E of the bus bar is equal to or larger than the judgment reference voltage Varc, the detection mode is switched from the ground fault detection mode to the short circuit detection mode. When it is detected that the ground fault continuation time t of the accident is equal to or longer than the determination reference time T and the line voltage E of the bus bar is lower than the determination reference voltage Varc, the detection mode remains the ground fault detection mode. A method for locating an accident point of a gas insulated switchgear, characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6211324A JPH0879965A (en) | 1994-09-05 | 1994-09-05 | Method for locating accident point of gas insulated switchgear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6211324A JPH0879965A (en) | 1994-09-05 | 1994-09-05 | Method for locating accident point of gas insulated switchgear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0879965A true JPH0879965A (en) | 1996-03-22 |
Family
ID=16604073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6211324A Withdrawn JPH0879965A (en) | 1994-09-05 | 1994-09-05 | Method for locating accident point of gas insulated switchgear |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0879965A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487780A (en) * | 2013-09-09 | 2014-01-01 | 国家电网公司 | System and method for testing GIS electronic transformer |
-
1994
- 1994-09-05 JP JP6211324A patent/JPH0879965A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487780A (en) * | 2013-09-09 | 2014-01-01 | 国家电网公司 | System and method for testing GIS electronic transformer |
| CN103487780B (en) * | 2013-09-09 | 2016-03-23 | 国家电网公司 | A kind of GIS electronic transformer test macro and method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100246203B1 (en) | A control system and method for high impedance ground fault of power line in a power system | |
| WO2011032585A1 (en) | Apparatus for protecting a medium voltage distribution transformer and the distribution line upstream of the transformer | |
| JP4757968B2 (en) | Distinguishing internal arcs and breaking arcs in intermediate or high voltage circuit breakers. | |
| CN112363005B (en) | GIS combined electrical apparatus fault detection and processing method, device and storage medium | |
| Morton | Circuit breaker and protection requirements for DC switchgear used in rapid transit systems | |
| Kato et al. | Distribution automation systems for high quality power supply | |
| JPH0879965A (en) | Method for locating accident point of gas insulated switchgear | |
| US4536815A (en) | Protective relay apparatus and method for providing single-pole tripping | |
| JP3172989B2 (en) | Gas circuit breaker failure detection device | |
| JPH0879966A (en) | Method for locating accident point of gas insulated switchgear | |
| KR101602060B1 (en) | Apparatus and method for detecting fault point using protection relay | |
| JP2587913Y2 (en) | Gas insulated switchgear accident section detector | |
| KR19990083046A (en) | Bus protection system for spot network type electric power receiving in stallation | |
| JPH07227018A (en) | Device for detecting faulty compartment of gas-insulated switchgear | |
| US3382410A (en) | Arcing fault detector | |
| JPH10271663A (en) | Protective relay device | |
| JPH08235976A (en) | Failure detecting device of gas blast circuit-breaker | |
| KR200218514Y1 (en) | An Apparatus of Preventing Potential Transformer Ferro Resonance in a 154kV Gas Insulated Switchgear Substation | |
| JPH0850160A (en) | Standardizing method of locating accident point for gas insulation switchgear | |
| JPH08182132A (en) | Accident point spotting device for gas-insulated switchgear | |
| KR20170111212A (en) | Relay | |
| EP2620969A1 (en) | High-voltage electrical switchgear | |
| JP2956438B2 (en) | Detecting unit for failure zone of gas insulated switchgear | |
| JP2821473B2 (en) | Detection and disconnection method of predictive ground fault section of high voltage distribution line | |
| JP2956446B2 (en) | Detecting unit for failure zone of gas insulated switchgear |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20011106 |