JP3315822B2 - Circuit breaker for neutral protection - Google Patents
Circuit breaker for neutral protectionInfo
- Publication number
- JP3315822B2 JP3315822B2 JP22818394A JP22818394A JP3315822B2 JP 3315822 B2 JP3315822 B2 JP 3315822B2 JP 22818394 A JP22818394 A JP 22818394A JP 22818394 A JP22818394 A JP 22818394A JP 3315822 B2 JP3315822 B2 JP 3315822B2
- Authority
- JP
- Japan
- Prior art keywords
- neutral
- circuit breaker
- line
- current
- protection circuit
- 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.)
- Expired - Fee Related
Links
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Emergency Protection Circuit Devices (AREA)
- Direct Current Feeding And Distribution (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は直流送電系統の中性線保
護用しゃ断器装置において、特に通常運転時に中性線保
護用しゃ断器と並列に接続される振動回路のコンデンサ
による系統への影響をなくすようにした中性線保護用し
ゃ断器装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker device for protecting a neutral line of a DC transmission system, and particularly to the influence of a capacitor of an oscillating circuit connected in parallel with the circuit breaker for protecting a neutral line during normal operation. The present invention relates to a circuit breaker device for protecting a neutral conductor which eliminates the problem.
【０００２】[0002]
【従来の技術】例えば±５００ｋＶの高電圧直流送電系
統は、図９に示すように変換所に設置された複数の変換
器３を双極形に接続し、その一方の極の変換器３より直
流リアクトル４を介して＋側本線１が、他方の極の変換
器３より直流リアクトル４を介して−側本線１がそれぞ
れ引出され、さらに各極間より２本の中性線２が引出さ
れる構成となっている。2. Description of the Related Art For example, in a high-voltage DC transmission system of ± 500 kV, as shown in FIG. 9, a plurality of converters 3 installed in a conversion station are connected in a bipolar manner, and DC power is supplied from a converter 3 of one pole. The + main line 1 is drawn out via the reactor 4, the − main line 1 is drawn out from the converter 3 of the other pole via the DC reactor 4, and two neutral wires 2 are drawn out between the poles. It has a configuration.
【０００３】このような直流送電系統においては、中性
線２の地絡事故に備えて中性線の非接地端と大地間に中
性線保護用しゃ断器５（以下主しゃ断器と呼ぶ）が設置
され、中性線に地絡事故が発生すると、主しゃ断器５を
投入し、地絡事故点から大地に流れる故障電流が主しゃ
断器５を通して流れるようにしている。In such a DC power transmission system, a neutral line protection circuit breaker 5 (hereinafter referred to as a main circuit breaker) is provided between the non-grounded end of the neutral line and the ground in preparation for a ground fault of the neutral line 2. When a ground fault occurs in the neutral line, the main circuit breaker 5 is turned on so that a fault current flowing from the ground fault point to the ground flows through the main circuit breaker 5.
【０００４】従って、中性線の地絡事故時に主しゃ断器
５を投入して故障電流を大地に流すことにより、地絡事
故点から大地へ流れる故障電流が消失し、地絡事故を回
復させることができる。[0004] Therefore, when the ground fault of the neutral line is caused, the main circuit breaker 5 is turned on to supply the fault current to the ground, so that the fault current flowing from the ground fault to the ground disappears, and the ground fault is recovered. be able to.
【０００５】また、地絡が回復した後は、主しゃ断器５
を開放して電流をしゃ断することにより、主しゃ断器５
を通して流れていた電流を中性線２へ復帰させることが
できる。After the ground fault is restored, the main circuit breaker 5
The main circuit breaker 5
The current flowing through the neutral line 2 can be returned to the neutral line 2.
【０００６】このように中性線２に地絡事故が発生した
場合には主しゃ断器５を投入して地絡事故を回復させ、
通常状態に戻すためには主しゃ断器５を開放して確実に
電流をしゃ断し、中性線電流を復帰させなければならな
い。When a ground fault has occurred in the neutral line 2 as described above, the main breaker 5 is turned on to recover the ground fault,
In order to return to the normal state, the main circuit breaker 5 must be opened to reliably cut off the current and restore the neutral current.
【０００７】ところで、主しゃ断器５により電流をしゃ
断するには、直流に零点を生じさせる必要があり、この
ため従来では主しゃ断器５のアーク特性を利用して主し
ゃ断器５と並列に接続されたリアクトルとコンデンサか
らなる振動回路７により振動電流を発生させ、直流に零
点を生じさせるようにした自励振動方式の中性線保護用
しゃ断器装置が採用されている。However, in order to cut off the current by the main circuit breaker 5, it is necessary to generate a zero point in the direct current. For this reason, conventionally, the main circuit breaker 5 is connected in parallel with the main circuit breaker 5 by utilizing the arc characteristics of the main circuit breaker 5. A self-excited oscillation type neutral wire protection circuit breaker device is used in which an oscillating current is generated by an oscillating circuit 7 including a reactor and a capacitor, and a zero point is generated in DC.
【０００８】この場合、中性線保護用しゃ断器装置には
電流をしゃ断する主しゃ断器５と並列に振動電流を発生
させるための振動回路７として数十μF のコンデンサが
設置されている。また、主しゃ断器５は地絡事故時のみ
投入されるが、振動回路７は常時中性線２に接続されて
いる。さらに、主しゃ断器５と並列に故障電流しゃ断後
に発生する過電圧を抑制する過渡過電圧制限装置８が接
続されている。In this case, a neutral circuit protection circuit breaker device is provided with a capacitor of several tens of .mu.F as a vibration circuit 7 for generating a vibration current in parallel with the main circuit breaker 5 for breaking the current. The main circuit breaker 5 is turned on only when a ground fault occurs, but the vibration circuit 7 is always connected to the neutral line 2. Further, a transient overvoltage limiting device 8 that suppresses an overvoltage generated after the fault current is cut off is connected in parallel with the main breaker 5.
【０００９】[0009]
【発明が解決しようとする課題】このように従来の中性
線保護用しゃ断器装置においては、中性線の地絡事故時
には主しゃ断器５を投入して故障電流を大地に流し、故
障回復後には主しゃ断器５に並列に接続されたリアクト
ルと数十μF のコンデンサからなる振動回路７により直
流電流を振動させて電流零点を作り、主しゃ断器５によ
り確実に電流をしゃ断して中性線２に電流を転流させて
いる。As described above, in the conventional circuit breaker device for protecting a neutral line, at the time of a ground fault of a neutral line, the main circuit breaker 5 is turned on to supply a fault current to the ground, thereby recovering the fault. Later, a DC current is oscillated by a vibration circuit 7 composed of a reactor connected in parallel with the main circuit breaker 5 and a capacitor of several tens of μF to create a current zero point. The current is commutated to line 2.
【００１０】しかし、主しゃ断器５は故障回復後に開放
されるが、振動回路７は常時中性線２に接続されている
ため、直流送電系統の運用上数十μF のコンデンサが中
性線に接続されていることは好ましくない場合がある。However, the main circuit breaker 5 is opened after recovery from the failure, but since the oscillation circuit 7 is always connected to the neutral line 2, a capacitor of several tens of μF is connected to the neutral line for the operation of the DC transmission system. Being connected may not be desirable.
【００１１】本発明は上記のような事情に鑑みてなされ
たもので、その目的は主しゃ断器を開放する際に振動電
流を発生させて電流零点を作る振動回路のコンデンサに
よる直流送電系統へ与える悪影響を解消できる中性線保
護用しゃ断器装置を提供するにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a oscillating current when a main circuit breaker is opened to a dc power transmission system using a capacitor of an oscillating circuit for generating a current zero point. An object of the present invention is to provide a circuit breaker device for neutral protection capable of eliminating adverse effects.
【００１２】[0012]
【課題を解決するための手段】本発明は上記の目的を達
成するため、次のような手段により中性線保護用しゃ断
器装置を構成するものである。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention comprises a neutral circuit protection circuit breaker device by the following means.
【００１３】請求項１に対応する発明は、複数の変換器
を双極形に接続し、その一方の極の変換器より＋側本線
が、他方の極の変換器より−側本線がそれぞれ引出さ
れ、さらに各極間より２本の中性線が引出される構成の
直流送電系統に設置され、中性線の事故発生時に開閉動
作する中性線保護用しゃ断器装置において、前記中性線
の非接地端と大地との間に設けられ、前記中性線の事故
時に投入して事故電流を流入させ、事故が回復すると開
放して電流をしゃ断する中性線保護用しゃ断器と、この
中性線保護用しゃ断器に並列に接続され、中性線保護用
しゃ断器により事故電流をしゃ断する際に振動電流を発
生させるリアクトルおよびコンデンサからなる振動回路
と、前記中性線保護用しゃ断器に並列に接続され、事故
電流しゃ断後に発生する過電圧を抑制する過電圧制限装
置と、前記中性線の非接地端側に前記中性線保護用しゃ
断器と直列に設けられ、通常の系統運転時には前記振動
回路を前記中性線から切離し、中性線保護動作時に投入
する補助開閉手段とを備えたものである。According to a first aspect of the present invention, a plurality of converters are connected in a bipolar manner, and a main line on the + side is drawn from the converter on one of the poles, and a main line on the negative side is drawn from the converter on the other. A neutral line protection circuit breaker device, which is installed in a DC transmission system having a configuration in which two neutral lines are drawn out from between the poles and that opens and closes when a neutral line accident occurs, A neutral line protection circuit breaker provided between the non-grounded end and the earth, which is turned on when an accident occurs in the neutral line to cause an accident current to flow in, and is opened and interrupts the current when the accident is recovered; A vibration circuit consisting of a reactor and a capacitor connected in parallel with the neutral line protection circuit breaker and generating an oscillating current when the fault current is cut off by the neutral line protection circuit breaker, and the neutral line protection circuit breaker Connected in parallel and occurs after the fault current is cut off An overvoltage limiting device that suppresses an overvoltage, which is provided in series with the neutral line protection circuit breaker on the non-ground end side of the neutral line, disconnects the vibration circuit from the neutral line during normal system operation, And an auxiliary opening / closing means to be turned on at the time of neutral wire protection operation.
【００１４】請求項２に対応する発明は、複数の変換器
を双極形に接続し、その一方の極の変換器より＋側本線
が、他方の極の変換器より−側本線がそれぞれ引出さ
れ、さらに各極間より２本の中性線が引出される構成の
直流送電系統に設置され、中性線の事故発生時に開閉動
作する中性線保護用しゃ断器装置において、前記２本の
中性線の非接地端と大地との間にそれぞれ設けられ、前
記中性線の事故時に投入して事故電流を流入させ、事故
が回復すると開放して電流をしゃ断する２個の中性線保
護用しゃ断器と、各中性線保護用しゃ断器に並列にそれ
ぞれ接続され、中性線保護用しゃ断器により事故電流を
しゃ断する際に振動電流を発生させるリアクトルおよび
コンデンサからなる振動回路と、前記各中性線保護用し
ゃ断器に並列にそれぞれ接続され、事故電流しゃ断後に
発生する過電圧を抑制する過電圧制限装置と、前記各中
性線保護用しゃ断器に直列にそれぞれ設けられ、通常の
系統運転時には前記振動回路を前記中性線から切離し、
中性線保護動作時に投入する補助開閉手段とを備え、中
性線の事故時に一方の中性線保護用しゃ断器およびこれ
に直列の補助開閉手段が投入されたとき他方の中性線保
護用しゃ断器に直列の補助開閉手段のみを投入するよう
にしたものである。According to a second aspect of the present invention, a plurality of converters are connected in a bipolar manner, and a + main line is drawn from a converter of one pole and a − main line is drawn from a converter of the other pole. A neutral line protection circuit breaker device that is installed in a DC transmission system having a configuration in which two neutral lines are drawn out from between the poles and that opens and closes when a neutral line accident occurs. Two neutral wires are provided between the non-grounded end of the neutral wire and the ground, and are turned on and cut off when the neutral wire has an accident. And a vibration circuit comprising a reactor and a capacitor, which are connected in parallel to the respective circuit breakers for neutral protection and are each connected in parallel to each other and generate a vibration current when the fault current is cut off by the circuit breakers for neutral protection. It is connected in parallel to each neutral protective circuit breaker And an overvoltage limiting device that suppresses an overvoltage generated after the fault current is interrupted, and each of the neutral circuit protection circuit breakers is provided in series with the neutral line protection circuit breaker, and disconnects the vibration circuit from the neutral line during normal system operation. ,
Auxiliary switching means to be turned on during neutral wire protection operation, one neutral wire protection circuit breaker in the event of a neutral wire and the other neutral wire protection when the auxiliary switching means in series with this is turned on Only a series auxiliary opening / closing means is supplied to the circuit breaker.
【００１５】請求項３に対応する発明は、複数の変換器
を双極形に接続し、その一方の極の変換器より＋側本線
が、他方の極の変換器より−側本線がそれぞれ引出さ
れ、さらに各極間より２本の中性線が引出される構成の
直流送電系統に設置され、中性線の事故発生時に開閉動
作する中性線保護用しゃ断器装置において、前記中性線
の非接地端と大地との間に設けられ、前記中性線の事故
時に投入して事故電流を流入させ、事故が回復すると開
放して電流をしゃ断する中性線保護用しゃ断器と、この
中性線保護用しゃ断器に並列に接続され、中性線保護用
しゃ断器により事故電流をしゃ断する際に振動電流を発
生させるリアクトルおよびコンデンサからなる振動回路
と、前記中性線保護用しゃ断器に並列に接続され、事故
電流しゃ断後に発生する過電圧を抑制する過電圧制限装
置と、前記振動回路および過電圧制限装置にそれぞれ直
列に設けられ、通常の系統運転時には前記振動回路を前
記中性線から切離し、中性線保護動作時に投入する補助
開閉手段とを備えたものである。According to a third aspect of the present invention, a plurality of converters are connected in a bipolar manner, and a + main line is drawn from a converter of one pole and a − main line is drawn from a converter of the other pole. A neutral line protection circuit breaker device, which is installed in a DC transmission system having a configuration in which two neutral lines are drawn out from between the poles and that opens and closes when a neutral line accident occurs, A neutral line protection circuit breaker provided between the non-grounded end and the earth, which is turned on when an accident occurs in the neutral line to cause an accident current to flow in, and is opened and interrupts the current when the accident is recovered; A vibration circuit consisting of a reactor and a capacitor connected in parallel with the neutral line protection circuit breaker and generating an oscillating current when the fault current is cut off by the neutral line protection circuit breaker, and the neutral line protection circuit breaker Connected in parallel and occurs after the fault current is cut off An over-voltage limiting device that suppresses over-voltage, and an auxiliary switch that is provided in series with the oscillation circuit and the over-voltage limiting device, and that separates the oscillation circuit from the neutral line during normal system operation and that is turned on during a neutral line protection operation. Means.
【００１６】請求項４に対応する発明は、複数の変換器
を双極形に接続し、その一方の極の変換器より＋側本線
が、他方の極の変換器より−側本線がそれぞれ引出さ
れ、さらに各極間より２本の中性線が引出され、且つ中
性線に中性線用過電圧制限装置が接続された構成の直流
送電系統に設置され、中性線の事故発生時に開閉動作す
る中性線保護用しゃ断器装置において、前記中性線の非
接地端と大地との間に設けられ、前記中性線の事故時に
投入して事故電流を流入させ、事故が回復すると開放し
て電流をしゃ断する中性線保護用しゃ断器と、この中性
線保護用しゃ断器に並列に接続され、中性線保護用しゃ
断器により事故電流をしゃ断する際に振動電流を発生さ
せるリアクトルおよびコンデンサからなる振動回路と、
この振動回路に直列に設けられ、通常の系統運転時には
前記振動回路を前記中性線から切離し、中性線保護動作
時に投入する補助開閉手段とを備え、前記中性線保護用
しゃ断器により事故電流がしゃ断後に発生する過電圧を
前記中性線用過電圧制限装置により抑制するようにした
ものである。According to a fourth aspect of the present invention, a plurality of converters are connected in a bipolar manner, and a main line on the + side is drawn from the converter on one of the poles, and a main line on the negative side is drawn from the converter on the other. In addition, it is installed in the DC transmission system in which two neutral wires are drawn out from each pole, and the neutral wire is connected to an overvoltage limiter for the neutral wire. In the circuit breaker device for protection of the neutral conductor, the neutral conductor is provided between the ungrounded end of the neutral conductor and the ground. And a reactor that is connected in parallel with the neutral line protection circuit breaker and shuts off current, and that generates an oscillating current when the neutral line protection circuit breaker interrupts the fault current. A vibration circuit consisting of a capacitor,
Auxiliary switching means provided in series with the vibration circuit to disconnect the vibration circuit from the neutral line during normal system operation and to turn on the circuit during the neutral line protection operation. The overvoltage generated after the interruption of the current is suppressed by the neutral voltage overvoltage limiting device.
【００１７】[0017]
【００１８】[0018]
【作用】上記請求項１に対応する発明にあっては、中性
線の地絡事故時には中性線の非接地端と中性線保護用し
ゃ断器との間に直列に設けられた補助開閉手段が投入さ
れ、中性線保護用しゃ断器に並列に接続された振動回路
が中性線に接続されるので、中性線保護用しゃ断器によ
り事故電流をしゃ断する際の振動電流を発生させること
ができ、また通常の系統運用時には補助開閉手段が開放
され、中性線保護用しゃ断器に並列に接続された振動回
路が中性線より切離されているので、振動回路のコンデ
ンサによる好ましくない影響を系統に与えることがなく
なる。According to the invention corresponding to the first aspect, in the event of a neutral ground fault, an auxiliary switching device provided in series between the non-grounded end of the neutral conductor and the neutral protective circuit breaker. When the means is turned on and the vibration circuit connected in parallel with the neutral protection circuit breaker is connected to the neutral conductor, the oscillating current is generated when the fault current is interrupted by the neutral protection circuit breaker. In addition, during normal system operation, the auxiliary switching means is opened, and the vibration circuit connected in parallel with the neutral line protection circuit breaker is separated from the neutral line. No influence on the system.
【００１９】上記請求項２に対応する発明にあっては、
２本の中性線の非接地端と大地との間に請求項２に対応
する発明の中性線保護用しゃ断器装置がそれぞれ接続さ
れているので、中性線の地絡事故時に一方の中性線保護
用しゃ断器装置の補助開閉手段および中性線保護用しゃ
断器を投入し、他方の中性線保護用しゃ断器装置に対し
ては補助開閉手段のみを投入することにより、故障電流
は一方の中性線保護用しゃ断器装置の補助開閉手段およ
び中性線保護用しゃ断器を通して接地点に流れ、事故回
復後は１つの中性線保護用しゃ断器と２つの振動回路で
電流をしゃ断することができる。In the invention corresponding to claim 2,
The circuit breaker device for neutral protection according to the second aspect of the present invention is connected between the non-grounded ends of the two neutral wires and the ground. By turning on the auxiliary switching means and neutral circuit protection circuit breaker for the neutral line protection circuit breaker device and turning on only the auxiliary switching means for the other neutral line protection circuit breaker device, the fault current Flows to the ground through the auxiliary switching means of one neutral protection circuit breaker device and the neutral protection circuit breaker, and after recovery from the accident, the current flows through one neutral protection circuit breaker and two oscillating circuits. Can be cut off.
【００２０】請求項３に対応する発明にあっては、中性
線の地絡事故時には中性線保護用しゃ断器に並列に接続
された振動回路に直列の補助開閉手段が投入されると、
振動回路が中性線に接続されるので、中性線保護用しゃ
断器により電流をしゃ断する際の振動電流を発生させる
ことができると共に、電流しゃ断後の過電圧に対しては
中性線保護用しゃ断器に並列に接続された過電圧制限装
置に直列の補助開閉手段の投入により抑制することがで
きる。また、通常の系統運用時にはそれぞれの補助開閉
手段が開放され、中性線保護用しゃ断器に並列に接続さ
れた振動回路が中性線より切離されているので、振動回
路のコンデンサによる好ましくない影響を系統に与える
ことがなくなる。According to a third aspect of the present invention, in the event of a neutral ground fault, when a series auxiliary switching means is turned on in a vibration circuit connected in parallel with the neutral protection circuit breaker,
Since the oscillation circuit is connected to the neutral conductor, it is possible to generate an oscillating current when interrupting the current with the neutral conductor protection circuit breaker and to protect the neutral conductor against overvoltage after the current interruption. This can be suppressed by turning on the auxiliary switching means in series with the overvoltage limiting device connected in parallel with the circuit breaker. In addition, during normal system operation, the respective auxiliary switching means are opened, and the vibration circuit connected in parallel to the neutral line protection circuit breaker is disconnected from the neutral line, which is undesirable due to the capacitor of the vibration circuit. It will not affect the system.
【００２１】請求項４に対応する発明にあっては、中性
線保護用しゃ断器に並列に接続された振動回路に直列の
補助開閉手段を投入し、通常の系統運用時には補助開閉
手段を開放することにより振動回路のコンデンサによる
好ましくない影響を系統に与えることがなく、また電流
しゃ断後の過電圧に対しては中性線に接続された中性線
用過電圧制限装置により抑制することができる。According to a fourth aspect of the present invention, the auxiliary switching means is connected in series to a vibration circuit connected in parallel with the neutral protection circuit breaker, and the auxiliary switching means is opened during normal system operation. By doing so, undesired effects due to the capacitor of the oscillation circuit are not exerted on the system, and overvoltage after current interruption can be suppressed by the neutral voltage overvoltage limiting device connected to the neutral wire.
【００２２】[0022]
【００２３】[0023]
【実施例】以下本発明の実施例を図面を参照して説明す
る。Embodiments of the present invention will be described below with reference to the drawings.
【００２４】図１は本発明による中性線保護用しゃ断器
装置の第１の実施例を示す変換所の系統構成図で、図９
と同一部分には同一符号を付して説明する。FIG. 1 is a system diagram of a conversion station showing a first embodiment of a circuit breaker device for neutral protection according to the present invention.
The same parts as those described above are denoted by the same reference numerals and described.
【００２５】図１に示すように変換所に設置された複数
の変換器３は双極形に接続され、その一方の極の変換器
３より直流リアクトル４を介して＋側本線１が、他方の
極の変換器３より直流リアクトル４を介して−側本線１
がそれぞれ引出され、さらに各極間より２本の中性線２
が引出される構成となっている。As shown in FIG. 1, a plurality of converters 3 installed in the conversion station are connected in a bipolar manner, and the converter 3 of one pole connects the + main line 1 via the DC reactor 4 to the other, and From the pole converter 3 via the DC reactor 4 to the negative side main line 1
Respectively, and two neutral wires 2
Is drawn out.
【００２６】このような構成の高電圧直流送電系統にお
いて、中性線２の非接地端と大地との間に主しゃ断器５
を設置し、この主しゃ断器５に並列にリアクトルとコン
デンサからなる振動回路７および過電圧制限装置８をそ
れぞれ接続し、さらに中性線２の非接地側と主しゃ断器
５との間に通常の系統運用時には開放状態にある補助し
ゃ断器６を直列に設け、中性線保護用しゃ断器装置１１
を構成するようにしたものである。In the high-voltage DC transmission system having such a configuration, the main circuit breaker 5 is connected between the non-grounded end of the neutral conductor 2 and the ground.
And an oscillation circuit 7 composed of a reactor and a capacitor and an overvoltage limiting device 8 are connected in parallel to the main circuit breaker 5, respectively. Further, a normal circuit is provided between the non-grounded side of the neutral conductor 2 and the main circuit breaker 5. During system operation, an auxiliary circuit breaker 6 in an open state is provided in series,
Is constituted.
【００２７】次に上記のように構成された中性線保護用
しゃ断器装置の作用を図２を参照しながら説明する。Next, the operation of the circuit breaker device for neutral protection constructed as described above will be described with reference to FIG.
【００２８】いま、図２（ａ）に示すように中性線運用
時に中性線２に地絡事故９が発生すると、故障電流は地
絡点より大地を通して接地点１２へと流れる電流経路１
０となる。As shown in FIG. 2A, when a ground fault 9 occurs in the neutral line 2 during the operation of the neutral line, the fault current flows through the current path 1 flowing from the ground point to the ground 12 through the ground.
It becomes 0.
【００２９】このとき中性線の地絡事故を回復させるた
めため、中性線保護用しゃ断器装置１１の補助しゃ断器
６および主しゃ断器５を投入すると、地絡点から大地へ
流れていた電流は図２（ｂ）に示す電流経路１０で接地
点１２へと流れる。At this time, when the auxiliary breaker 6 and the main breaker 5 of the neutral line protective circuit breaker device 11 are turned on in order to recover from the ground fault of the neutral line, the ground flow point flows to the ground. The current flows to the ground point 12 on the current path 10 shown in FIG.
【００３０】この後、リアクトルとコンデンサからなる
振動回路７で作られる電流零点に同期させて主しゃ断器
５および補助しゃ断器６を開放して電流をしゃ断するこ
とにより、主しゃ断器５を通して流れていた電流が図２
（ｃ）に示すように地絡事故の回復した中性線２に転流
し、通常の運用に戻る。Thereafter, the main circuit breaker 5 and the auxiliary circuit breaker 6 are opened and the current is cut off in synchronization with the current zero point generated by the vibration circuit 7 composed of the reactor and the capacitor, so that the current flows through the main circuit breaker 5. Fig. 2
As shown in (c), the current is commutated to the neutral line 2 where the ground fault has been recovered, and the operation returns to the normal operation.
【００３１】このように第１の実施例では、中性線２の
非接地端と振動回路７および過電圧制限装置８がそれぞ
れ並列接続された主しゃ断器５との間に補助しゃ断器６
を直列に設け、通常の系統運用時には補助しゃ断器６を
開放状態にしておき、中性線２の地絡事故時に補助しゃ
断器６および主しゃ断器５を投入するようにしたので、
通常の系統運用時に振動回路７の数十μF のコンデンサ
による好ましくない影響を系統に与えることがなくな
る。As described above, in the first embodiment, the auxiliary circuit breaker 6 is connected between the non-grounded end of the neutral conductor 2 and the main circuit breaker 5 in which the vibration circuit 7 and the overvoltage limiting device 8 are connected in parallel.
Are provided in series, the auxiliary circuit breaker 6 is kept open during normal system operation, and the auxiliary circuit breaker 6 and the main circuit breaker 5 are turned on when a ground fault occurs in the neutral line 2.
During normal operation of the system, undesirable effects due to the capacitor of several tens of μF of the oscillation circuit 7 are not exerted on the system.
【００３２】図３は本発明による中性線保護用しゃ断器
装置の第２の実施例を示すもので、図１と異なる点は主
しゃ断器５の非接地端側と中性線２との間にしゃ断器６
に代えて断路器１３を設けたものである。FIG. 3 shows a second embodiment of the circuit breaker device for neutral protection according to the present invention. The difference from FIG. 1 is that the circuit breaker between the non-grounded end side of the main circuit breaker 5 and the neutral line 2 is different. Breaker 6 between
And a disconnector 13 is provided in place of the disconnector 13.
【００３３】このような構成の中性線保護用しゃ断器装
置においても、第１の実施例と同様の作用効果を得るこ
とができる。In the circuit breaker device for protecting a neutral conductor having such a configuration, the same operation and effect as those of the first embodiment can be obtained.
【００３４】図４は本発明による中性線保護用しゃ断器
装置の第３の実施例を示す系統構成図で、図１と同一部
分には同一符号を付してある。FIG. 4 is a system configuration diagram showing a third embodiment of a circuit breaker device for neutral protection according to the present invention, and the same parts as those in FIG. 1 are denoted by the same reference numerals.
【００３５】第３の実施例では、図４に示すように双極
形変換器の各極間より引出される２本の中性線２にそれ
ぞれ図１に示す構成の中性線保護用しゃ断器装置１１を
２個設置するようにしたものである。この場合、振動回
路７のリアクトル値およびコンデンサ値はそれぞれ同一
である。In the third embodiment, as shown in FIG. 4, two neutral wires 2 drawn out between the poles of the bipolar converter are each used as a neutral circuit protection circuit breaker having the structure shown in FIG. This is such that two devices 11 are installed. In this case, the reactor value and the capacitor value of the vibration circuit 7 are the same.
【００３６】このような構成とすれば、中性線の地絡事
故時に一方の中性線保護用しゃ断器装置１１の補助しゃ
断器６および主しゃ断器５を投入し、他方の中性線保護
用しゃ断器装置１１に対しては補助しゃ断器６のみを投
入することにより、地絡故障電流は一方の中性線保護用
しゃ断器装置１１の補助しゃ断器６および主しゃ断器５
を通して接地点に流れ、地絡事故の回復後は１つの主し
ゃ断器５と２つの振動回路７で電流をしゃ断することが
できる。With this configuration, in the event of a neutral ground fault, the auxiliary circuit breaker 6 and the main circuit breaker 5 of the neutral line protection circuit breaker device 11 are turned on and the other neutral line protection circuit is activated. By turning on only the auxiliary circuit breaker 6 for the circuit breaker device 11, the ground fault current is reduced to the auxiliary circuit breaker 6 and the main circuit breaker 5 of the neutral line protection circuit breaker device 11.
After the ground fault has been recovered, the current can be interrupted by one main circuit breaker 5 and two vibration circuits 7.
【００３７】図５は本発明による中性線保護用しゃ断器
装置の第４の実施例を示す系統構成図で、図４と異なる
点は双極形変換器の各極間より引出される２本の中性線
２にそれぞれ図３に示す構成の中性線保護用しゃ断器装
置１１を２個設置するようにしたものである。FIG. 5 is a system configuration diagram showing a fourth embodiment of a circuit breaker device for protecting a neutral conductor according to the present invention. The difference from FIG. 4 is that two wires are drawn out between the poles of the bipolar converter. The neutral line protection circuit breaker device 11 shown in FIG. 3 is installed on each neutral line 2.
【００３８】このような構成としても、前述した第３の
実施例と同様の作用効果を得ることができる。With such a configuration, the same operation and effect as those of the third embodiment can be obtained.
【００３９】図６は本発明による中性線保護用しゃ断器
装置の第５の実施例を示す系統構成図で、図１と同一部
分には同一符号を付してある。FIG. 6 is a system configuration diagram showing a fifth embodiment of a circuit breaker device for protecting a neutral conductor according to the present invention, and the same parts as those in FIG. 1 are denoted by the same reference numerals.
【００４０】第５の実施例では、図６に示すように中性
線２に主しゃ断器５の一端を接続し、他端を大地に接続
する。また、主しゃ断器５と並列にリアクトルおよびコ
ンデンサからなる振動回路７と補助スイッチ１７とを直
列接続し、さらに主しゃ断器５と並列に過電圧制限装置
８と補助スイッチ１７とを直列接続する構成としたもの
である。In the fifth embodiment, as shown in FIG. 6, one end of the main circuit breaker 5 is connected to the neutral wire 2, and the other end is connected to the ground. Further, a configuration in which the oscillation circuit 7 composed of a reactor and a capacitor and the auxiliary switch 17 are connected in series with the main circuit breaker 5, and the overvoltage limiting device 8 and the auxiliary switch 17 are connected in series with the main circuit breaker 5. It was done.
【００４１】このような構成の中性線保護用しゃ断器装
置において、通常の系統運用時には主しゃ断器５、補助
スイッチ１７を開放しておき、中性線２の地絡事故時に
主しゃ断器５および補助スイッチ１７を投入することに
より、第１の実施例と同様の作用効果を得ることができ
る。In the circuit breaker device for protecting a neutral line having such a configuration, the main circuit breaker 5 and the auxiliary switch 17 are opened during normal system operation, and the main circuit breaker 5 is opened when a ground fault of the neutral line 2 occurs. By turning on the auxiliary switch 17, the same operation and effect as in the first embodiment can be obtained.
【００４２】図７は本発明による中性線保護用しゃ断器
装置の第６の実施例を示す系統構成図で、図６と同一部
分には同一符号を付してある。FIG. 7 is a system configuration diagram showing a sixth embodiment of a circuit breaker device for protecting a neutral conductor according to the present invention, and the same parts as those in FIG. 6 are denoted by the same reference numerals.
【００４３】第６の実施例では、図７に示すように中性
線２に主しゃ断器５の一端を接続し、他端を大地に接続
する。また、主しゃ断器５と並列にリアクトルおよびコ
ンデンサからなる振動回路７と補助スイッチ１７とを直
列接続する。さらに、中性線２に中性線用過電圧制限装
置１４の一端を接続し、他端を接地する構成としたもの
である。In the sixth embodiment, as shown in FIG. 7, one end of the main circuit breaker 5 is connected to the neutral wire 2, and the other end is connected to the ground. Further, the oscillation circuit 7 composed of a reactor and a capacitor and the auxiliary switch 17 are connected in series with the main circuit breaker 5 in parallel. Further, one end of the neutral voltage overvoltage limiting device 14 is connected to the neutral wire 2 and the other end is grounded.
【００４４】このような構成の中性線保護用しゃ断器装
置においては、通常の系統運用時には主しゃ断器５およ
び補助スイッチ１７が開放されているので、振動回路７
は中性線２から切離されており、中性線２の地絡事故時
には主しゃ断器５および補助スイッチ１７が投入され、
地絡事故回復により電流しゃ断後の過電圧に対しては中
性線用過電圧制限装置１４により抑制することができ
る。In the circuit breaker device for protecting a neutral conductor having such a configuration, the main circuit breaker 5 and the auxiliary switch 17 are open during normal operation of the system.
Is disconnected from the neutral line 2, and when a ground fault occurs in the neutral line 2, the main circuit breaker 5 and the auxiliary switch 17 are turned on.
Overvoltage after current interruption due to ground fault recovery can be suppressed by the neutral voltage overvoltage limiting device 14.
【００４５】図８は本発明による中性線保護用しゃ断器
装置の第７の実施例を示す系統構成図で、図７と同一部
分には同一符号を付してある。FIG. 8 is a system configuration diagram showing a seventh embodiment of a circuit breaker device for neutral protection according to the present invention, and the same parts as those in FIG. 7 are denoted by the same reference numerals.
【００４６】第７の実施例では、図８に示すように中性
線２に主しゃ断器５の一端を接続し、他端を大地に接続
する。また、中性線２に中性線リアクトル１６を設け、
また中性線２に中性線用過電圧制限装置１４およびサー
ジキャパシタ１５の一端をそれぞれ接続し、これらの他
端をそれぞれ接地する構成としたものである。In the seventh embodiment, as shown in FIG. 8, one end of the main circuit breaker 5 is connected to the neutral wire 2, and the other end is connected to the ground. In addition, a neutral reactor 16 is provided on the neutral wire 2,
Further, one end of the neutral voltage overvoltage limiting device 14 and one end of the surge capacitor 15 are connected to the neutral wire 2, and the other ends thereof are grounded.
【００４７】このような構成の中性線保護用しゃ断器装
置においては、通常の系統運用時には主しゃ断器５は開
放しており、中性線２の地絡事故時に投入される。ま
た、地絡事故回復後には中性線２に設置されたサージキ
ャパシタ１５と中性線リアクトル１６により発生する振
動電流の零点で主しゃ断器５を開放することにより電流
がしゃ断され、電流しゃ断後の過電圧は中性線用過電圧
制限装置１４により抑制することができる。In the circuit breaker device for protecting a neutral line having such a configuration, the main circuit breaker 5 is open during normal operation of the system, and is turned on when a ground fault of the neutral line 2 occurs. After the ground fault has recovered, the current is cut off by opening the main circuit breaker 5 at the zero point of the oscillating current generated by the surge capacitor 15 and the neutral line reactor 16 installed on the neutral conductor 2, and after the current interruption. Can be suppressed by the neutral voltage overvoltage limiting device 14.
【００４８】従って、補助しゃ断器や補助スイッチを設
けなくても、中性線用過電圧制限装置１４および中性線
リアクトル１６が中性線用として設置されている系統に
あってはこれらを利用することにより、主しゃ断器５の
みで電流を接地点に流したり、中性線２に転流させたり
することができる。Therefore, even if an auxiliary circuit breaker and an auxiliary switch are not provided, in a system in which the neutral voltage overvoltage limiting device 14 and the neutral line reactor 16 are installed for the neutral line, they are used. Thus, the current can be caused to flow to the ground point only by the main circuit breaker 5 or to be diverted to the neutral conductor 2.
【００４９】[0049]
【発明の効果】以上述べたように本発明によれば、主し
ゃ断器の開放する際に振動電流を発生させて電流零点を
作る振動回路を故障時のみ中性線に接続し、常時は中性
線から切離すようにしたので、直流送電系統に与える悪
影響を解消することができる中性線保護用しゃ断器装置
を提供できる。As described above, according to the present invention, when the main circuit breaker is opened, an oscillating circuit for generating an oscillating current to create a current zero point is connected to the neutral line only when a fault occurs, and the oscillating circuit is always connected to the neutral line. Since it is separated from the neutral line, it is possible to provide a neutral line protection circuit breaker device that can eliminate an adverse effect on the DC transmission system.
【図１】本発明による中性線保護用しゃ断器装置の第１
の実施例を示す変換所の系統構成図。FIG. 1 is a circuit breaker device for neutral protection according to the present invention.
FIG. 1 is a system configuration diagram of a conversion station showing an embodiment of FIG.
【図２】同実施例の作用を説明するための直流系統の運
用図。FIG. 2 is an operation diagram of a DC system for explaining the operation of the embodiment.
【図３】本発明の第２の実施例を示す系統構成図。FIG. 3 is a system configuration diagram showing a second embodiment of the present invention.
【図４】本発明の第３の実施例を示す系統構成図。FIG. 4 is a system configuration diagram showing a third embodiment of the present invention.
【図５】本発明の第４の実施例を示す系統構成図。FIG. 5 is a system configuration diagram showing a fourth embodiment of the present invention.
【図６】本発明の第５の実施例を示す系統構成図。FIG. 6 is a system configuration diagram showing a fifth embodiment of the present invention.
【図７】本発明の第６の実施例を示す系統構成図。FIG. 7 is a system configuration diagram showing a sixth embodiment of the present invention.
【図８】本発明の第７の実施例を示す系統構成図。FIG. 8 is a system configuration diagram showing a seventh embodiment of the present invention.
【図９】従来の中性線保護用しゃ断器装置を示す変換所
の系統構成図。FIG. 9 is a system configuration diagram of a conversion station showing a conventional circuit breaker device for neutral protection.
【符号の説明】 １……本線、２……中性線、３……変換器、４……直流
リアクトル、５……主しゃ断器、６……補助しゃ断器、
７……振動回路、８……過電圧制限装置、１１……中性
線保護用しゃ断器装置、１３……断路器、１４……中性
線用過電圧制限装置、１５……サージキャパシタ、１６
……中性線リアクトル、１７……補助スイッチ。[Description of Signs] 1 ... Main line, 2 ... Neutral line, 3 ... Converter, 4 ... DC reactor, 5 ... Main circuit breaker, 6 ... Auxiliary circuit breaker,
7 Oscillation circuit, 8 Overvoltage limiting device, 11 Neutral circuit breaker device, 13 Disconnector, 14 Neutral overvoltage limiting device, 15 Surge capacitor, 16
... Neutral reactor, 17 ... Auxiliary switch.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 腰塚 正 神奈川県川崎市川崎区浮島町２番１号 株式会社東芝浜川崎工場内 (72)発明者 西脇 進 神奈川県川崎市川崎区浮島町２番１号 株式会社東芝浜川崎工場内 (72)発明者 石川 雅之 神奈川県川崎市川崎区浮島町２番１号 株式会社東芝浜川崎工場内 (72)発明者 大橋 広和 神奈川県川崎市川崎区浮島町２番１号 株式会社東芝浜川崎工場内 (72)発明者 竹治 直昭 大阪府大阪市北区中之島３丁目３番22号 関西電力株式会社内 (72)発明者 杉原 洋 香川県高松市丸の内２番５号 四国電力 株式会社内 (72)発明者 三瓶 雅俊 東京都中央区銀座６丁目15番１号 電源 開発株式会社内 (56)参考文献 特開 昭57−49329（ＪＰ，Ａ) 特開 平５−234471（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H02J 1/00 H01H 33/59 H02H 3/00 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Tadashi Koshizuka, 2-1 Ukishima-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Inside the Toshiba Hamakawasaki Plant (72) Susumu Nishiwaki 2-1 Ukishima-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture No. Inside the Toshiba Hamakawasaki Plant (72) Inventor Masayuki Ishikawa No. 2-1 Ukishima-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Inside the Toshiba Hamakawasaki Plant (72) Inventor Hirokazu Ohashi 2-1 Ukishima-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture No. Within the Toshiba Hamakawasaki Plant (72) Inventor Naoaki Takeharu 3-3-22 Nakanoshima, Kita-ku, Osaka City, Osaka Prefecture Inside Kansai Electric Power Company (72) Inventor Hiroshi Sugihara 2-5 Marunouchi, Takamatsu City, Kagawa Prefecture Shikoku Electric Power Inside (72) Inventor Masatoshi Sampei 6-15-1, Ginza, Chuo-ku, Tokyo Inside Power Development Co., Ltd. (56) References JP-A-57-49329 ( P, A) JP flat 5-234471 (JP, A) (58 ) investigated the field (Int.Cl. 7, DB name) H02J 1/00 H01H 33/59 H02H 3/00
Claims (4)
方の極の変換器より＋側本線が、他方の極の変換器より
−側本線がそれぞれ引出され、さらに各極間より２本の
中性線が引出される構成の直流送電系統に設置され、中
性線の事故発生時に開閉動作する中性線保護用しゃ断器
装置において、 前記中性線の非接地端と大地との間に設けられ、前記中
性線の事故時に投入して事故電流を流入させ、事故が回
復すると開放して電流をしゃ断する中性線保護用しゃ断
器と、この中性線保護用しゃ断器に並列に接続され、中
性線保護用しゃ断器により事故電流をしゃ断する際に振
動電流を発生させるリアクトルおよびコンデンサからな
る振動回路と、前記中性線保護用しゃ断器に並列に接続
され、事故電流しゃ断後に発生する過電圧を抑制する過
電圧制限装置と、前記中性線の非接地端側に前記中性線
保護用しゃ断器と直列に設けられ、通常の系統運転時に
は前記振動回路を前記中性線から切離し、中性線保護動
作時に投入する補助開閉手段とを備えたことを特徴とす
る中性線保護用しゃ断器装置。1. A plurality of converters are connected in a bipolar form, and a main line on the + side is drawn from a converter on one pole and a main line on the − side is drawn from the converter on the other pole. A neutral line protection circuit breaker device that is installed in a DC transmission system configured to draw out a neutral line and that opens and closes when a neutral line accident occurs. A neutral protection circuit breaker, which is provided between the neutral conductors and is supplied when an accident occurs in the neutral conductor to cause an accident current to flow in and when the accident recovers, is opened and interrupts the current. A vibration circuit consisting of a reactor and a capacitor connected in parallel and generating an oscillating current when the fault current is cut off by the neutral wire protection circuit breaker, and connected in parallel to the neutral wire protection circuit breaker, Overvoltage that suppresses overvoltage that occurs after interruption A limiting device, provided in series with the neutral wire protection circuit breaker on the non-ground end side of the neutral wire, disconnects the vibration circuit from the neutral wire during normal system operation, and during the neutral wire protection operation A circuit breaker device for protecting a neutral conductor, comprising an auxiliary opening / closing means for inputting.
方の極の変換器より＋側本線が、他方の極の変換器より
−側本線がそれぞれ引出され、さらに各極間より２本の
中性線が引出される構成の直流送電系統に設置され、中
性線の事故発生時に開閉動作する中性線保護用しゃ断器
装置において、 前記２本の中性線の非接地端と大地との間にそれぞれ設
けられ、前記中性線の事故時に投入して事故電流を流入
させ、事故が回復すると開放して電流をしゃ断する２個
の中性線保護用しゃ断器と、各中性線保護用しゃ断器に
並列にそれぞれ接続され、中性線保護用しゃ断器により
事故電流をしゃ断する際に振動電流を発生させるリアク
トルおよびコンデンサからなる振動回路と、前記各中性
線保護用しゃ断器に並列にそれぞれ接続され、事故電流
しゃ断後に発生する過電圧を抑制する過電圧制限装置
と、前記各中性線保護用しゃ断器に直列にそれぞれ設け
られ、通常の系統運転時には前記振動回路を前記中性線
から切離し、中性線保護動作時に投入する補助開閉手段
とを備え、中性線の事故時に一方の中性線保護用しゃ断
器およびこれに直列の補助開閉手段が投入されたとき他
方の中性線保護用しゃ断器に直列の補助開閉手段のみを
投入することを特徴とする中性線保護用しゃ断器装置。2. A plurality of converters are connected in a bipolar form, and a main line on the + side is drawn from the converter on one of the poles, a main line on the − side is drawn from the converter on the other side, and two main lines are drawn from between the poles. The neutral line protection circuit breaker device, which is installed in the DC transmission system having a configuration in which the neutral lines are drawn out and operates to open and close when a neutral line accident occurs, comprises: Two neutral-circuit protection circuit breakers are provided between the ground and the ground, and are turned on and cut off the current when the fault is recovered when the fault is recovered by recovering the fault. A vibration circuit consisting of a reactor and a capacitor which are connected in parallel to the neutral line protection circuit breaker and generate an oscillating current when the fault current is interrupted by the neutral line protection circuit breaker; and the neutral line protection circuit breakers Are connected in parallel to the An overvoltage limiting device that suppresses an overvoltage generated after disconnection, and an overvoltage limiting device that is provided in series with each of the neutral line protection circuit breakers, disconnects the vibration circuit from the neutral line during normal system operation, and performs a neutral line protection operation. Auxiliary switching means to be turned on at the same time, when one of the neutral protection circuit breakers and the auxiliary switching means in series with the neutral protection circuit are turned on in the event of a neutral conductor, A circuit breaker device for protecting a neutral conductor, wherein only an auxiliary opening / closing means is turned on.
方の極の変換器より＋側本線が、他方の極の変換器より
−側本線がそれぞれ引出され、さらに各極間より２本の
中性線が引出される構成の直流送電系統に設置され、中
性線の事故発生時に開閉動作する中性線保護用しゃ断器
装置において、 前記中性線の非接地端と大地との間に設けられ、前記中
性線の事故時に投入して事故電流を流入させ、事故が回
復すると開放して電流をしゃ断する中性線保護用しゃ断
器と、この中性線保護用しゃ断器に並列に接続され、中
性線保護用しゃ断器により事故電流をしゃ断する際に振
動電流を発生させるリアクトルおよびコンデンサからな
る振動回路と、前記中性線保護用しゃ断器に並列に接続
され、事故電流しゃ断後に発生する過電圧を抑制する過
電圧制限装置と、前記振動回路および過電圧制限装置に
それぞれ直列に設けられ、通常の系統運転時には前記振
動回路を前記中性線から切離し、中性線保護動作時に投
入する補助開閉手段とを備えたことを特徴とする中性線
保護用しゃ断器装置。3. A plurality of converters are connected in a bipolar form, and a main line on the + side is drawn from a converter on one of the poles, and a main line on the − side is drawn from the converter on the other pole. A neutral line protection circuit breaker device that is installed in a DC transmission system configured to draw out a neutral line and that opens and closes when a neutral line accident occurs. A neutral protection circuit breaker, which is provided between the neutral conductors and is supplied when an accident occurs in the neutral conductor to cause an accident current to flow in and when the accident recovers, is opened and interrupts the current. A vibration circuit consisting of a reactor and a capacitor connected in parallel and generating an oscillating current when the fault current is cut off by the neutral wire protection circuit breaker, and connected in parallel to the neutral wire protection circuit breaker, Overvoltage that suppresses overvoltage that occurs after interruption A limiting device, and auxiliary switching means provided in series with the oscillation circuit and the overvoltage limiting device, respectively, for separating the oscillation circuit from the neutral wire during normal system operation and for turning on the neutral wire during a neutral wire protection operation. A circuit breaker device for neutral protection.
方の極の変換器より＋側本線が、他方の極の変換器より
−側本線がそれぞれ引出され、さらに各極間より２本の
中性線が引出され、且つ中性線に中性線用過電圧制限装
置が接続された構成の直流送電系統に設置され、中性線
の事故発生時に開閉動作する中性線保護用しゃ断器装置
において、 前記中性線の非接地端と大地との間に設けられ、前記中
性線の事故時に投入して事故電流を流入させ、事故が回
復すると開放して電流をしゃ断する中性線保護用しゃ断
器と、この中性線保護用しゃ断器に並列に接続され、中
性線保護用しゃ断器により事故電流をしゃ断する際に振
動電流を発生させるリアクトルおよびコンデンサからな
る振動回路と、この振動回路に直列に設けられ、通常の
系統運転時には前記振動回路を前記中性線から切離し、
中性線保護動作時に投入する補助開閉手段とを備え、前
記中性線保護用しゃ断器により事故電流がしゃ断後に発
生する過電圧を前記中性線用過電圧制限装置により抑制
するようにしたことを特徴とする中性線保護用しゃ断器
装置。4. A plurality of converters are connected in a bipolar form, and a positive main line is drawn from a converter of one pole, a negative main line is drawn from a converter of the other pole, and two main lines are drawn from each pole. Neutral wire protection cut-off that is installed in the DC transmission system with a neutral wire drawn out and a neutral wire overvoltage limiter connected to the neutral wire, and opens and closes when a neutral wire accident occurs A neutral device, which is provided between the non-grounded end of the neutral conductor and the ground and is supplied when an accident occurs in the neutral conductor to cause an accident current to flow in; A circuit breaker for line protection, a vibration circuit comprising a reactor and a capacitor connected in parallel to the circuit breaker for neutral line protection and generating an oscillating current when the fault current is cut off by the circuit breaker for neutral line protection; It is installed in series with this oscillation circuit, Sometimes disconnecting the oscillatory circuit from the neutral line,
Auxiliary opening / closing means that is turned on during neutral wire protection operation is provided, and the neutral voltage protection circuit breaker suppresses an overvoltage generated after the fault current is cut off by the neutral wire overvoltage limiting device. Neutral wire protection circuit breaker device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22818394A JP3315822B2 (en) | 1994-09-22 | 1994-09-22 | Circuit breaker for neutral protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22818394A JP3315822B2 (en) | 1994-09-22 | 1994-09-22 | Circuit breaker for neutral protection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0898402A JPH0898402A (en) | 1996-04-12 |
| JP3315822B2 true JP3315822B2 (en) | 2002-08-19 |
Family
ID=16872516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22818394A Expired - Fee Related JP3315822B2 (en) | 1994-09-22 | 1994-09-22 | Circuit breaker for neutral protection |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3315822B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7177799B2 (en) * | 2020-03-17 | 2022-11-24 | 北海道電力株式会社 | power converter |
-
1994
- 1994-09-22 JP JP22818394A patent/JP3315822B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0898402A (en) | 1996-04-12 |
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