JPH10112926A - High-speed large-current interrupting apparatus - Google Patents
High-speed large-current interrupting apparatusInfo
- Publication number
- JPH10112926A JPH10112926A JP26644196A JP26644196A JPH10112926A JP H10112926 A JPH10112926 A JP H10112926A JP 26644196 A JP26644196 A JP 26644196A JP 26644196 A JP26644196 A JP 26644196A JP H10112926 A JPH10112926 A JP H10112926A
- Authority
- JP
- Japan
- Prior art keywords
- current
- circuit
- short
- value
- breaker
- 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.)
- Pending
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電力系統での短絡
電流を低電流領域で遮断する高速度大電流遮断装置に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-speed and large-current interrupting device for interrupting a short-circuit current in a power system in a low current region.
【０００２】[0002]
【従来の技術】現在、電源系統が大容量となっているた
め、系統事故時の短絡電流が増大している。遮断器には
機械的遮断器と静止型（半導体）遮断器があるが、大容
量系統の短絡電流を遮断するには、その系統の短絡電流
以上の遮断能力を有する遮断器を適用することになる。
従来は機械的遮断器が多く使用されている。2. Description of the Related Art At present, since a power supply system has a large capacity, a short-circuit current at the time of a system failure has increased. Circuit breakers are classified into mechanical breakers and static (semiconductor) circuit breakers. To break short-circuit currents in large-capacity systems, use circuit breakers with a breaking capacity greater than the short-circuit current of the system. Become.
Conventionally, mechanical circuit breakers are often used.
【０００３】[0003]
【発明が解決しようとする課題】従来の遮断器で大短絡
電流が遮断できても遮断まで大短絡電流が流れるので、
系統の機器に損傷を与える。Even if a large short-circuit current can be interrupted by a conventional circuit breaker, a large short-circuit current flows until the interruption.
Damage to system equipment.
【０００４】このため、大容量系統においては、ライン
中にリアクトルを設けるなど各種短絡電流低減策が行わ
れているが、電圧降下の増大，系統の不安定化，回路ロ
スの増大等各種問題がある。特に発電機が並列に入って
いる場合に不安定運転となり、発電機脱落現象を生じ、
全停電に到るケースが多い。For this reason, various measures have been taken to reduce the short-circuit current, for example, by providing a reactor in the line in a large-capacity system. However, various problems such as an increase in voltage drop, instability of the system, and an increase in circuit loss have been taken. is there. Especially when the generator is in parallel, unstable operation occurs, causing the generator to drop out,
In many cases, a total power outage occurs.
【０００５】本発明は、従来のこのような問題に鑑みて
なされたもので、その目的とするところは、短絡電流の
立ち上りを高速度に検出し、電流がピークに達する前の
低電流領域において遮断することができる高速度大電流
遮断装置を提供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of such a conventional problem, and an object thereof is to detect the rise of a short-circuit current at a high speed and to detect the rise in a low current region before the current reaches a peak. An object of the present invention is to provide a high-speed and large-current interrupting device capable of interrupting.
【０００６】[0006]
【課題を解決するための手段】本発明の高速度大電流遮
断装置は、半導体遮断器と、電流の微分値を求め所定の
値と比較する回路によって短絡電流をその立ち上り時に
検出して短絡電流をピークに達する前の低電流領域で半
導体遮断器を遮断させる制御部とからなるものである。According to the present invention, there is provided a high-speed, large-current interrupting device which detects a short-circuit current at the time of its rise by using a semiconductor circuit breaker and a circuit for determining a differential value of the current and comparing it with a predetermined value. And a control unit for shutting off the semiconductor circuit breaker in a low current region before reaching the peak.
【０００７】[0007]
【発明の実施の形態】図１に高速度大電流遮断装置の適
用回路例を、図２にその半導体遮断器の制御部の回路例
を、図３に短絡電流波形を示す。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of a circuit to which a high-speed high-current interrupter is applied, FIG. 2 shows an example of a circuit of a control unit of the semiconductor circuit breaker, and FIG. 3 shows a short-circuit current waveform.
【０００８】図１において、Ｂは系統母線、Ｆ1，Ｆ2は
母線Ｂから負荷側へのフィーダ、ＣＢFはフィーダ遮断
器、ＣＴはフィーダ電流を検出する変流器、５１は遮断
器ＣＢFを遮断させる過電流継電器、Ａ1，Ａ2はそれぞ
れフィーダ遮断器ＣＢFと直列に接続された半導体遮断
器１とその制御部２からなる高速度大電流遮断装置、３
は遮断器ＣＢFを遮断させる交流過電流継電器である。[0008] In FIG. 1, B is system bus, F 1, F 2 feeder from bus B to the load side, CB F feeder breaker, CT is a current transformer for detecting the feeder current, the circuit breaker CB is 51 overcurrent relay to cut off the F, a 1, a 2 is a high speed high current cutoff device comprising a semiconductor circuit breaker 1 and its control unit 2 connected to the feeder circuit breaker CB F series, respectively, 3
Is an AC overcurrent relay to shut off the circuit breaker CB F.
【０００９】図２について、まず、半導体遮断器１のＵ
相のゲートをＯＦＦ制御するＵ相制御回路（ＣＴAUXU，
１１U〜１５U）について説明する。ＣＴAUXUはＵ相変流
器に接続されたＵ相補助変流器、１１Uはこの変流器か
らの電流をサンプリングする高速サンプリング回路、１
２Uはこのサンプリングした電流を変換するＡ／Ｄ変換
器、１３Uはこの変換器からの電流データから電流Ｉの
ｄＩ／ｄｔ値を演算する微分演算回路、１４Uはこのｄ
Ｉ／ｄｔ値を短絡判定設定値αと比較し、αより大きい
場合短絡電流として出力する短絡判定回路、１５Uはこ
の信号を受けて半導体遮断器１のＵ相ゲートへＯＦＦ信
号を出力するバッファ回路である。Referring to FIG. 2, first, U
U-phase control circuit (CT AUXU ,
11 U to 15 U) will be described. CT AUXU is a U-phase auxiliary current transformer connected to the U-phase current transformer, 11 U is a high-speed sampling circuit for sampling the current from this current transformer, 1
2 U is an A / D converter for converting the sampled current, 13 U is a differential operation circuit for calculating the dI / dt value of the current I from the current data from this converter, and 14 U is this d
A short-circuit determination circuit that compares the I / dt value with a short-circuit determination set value α and outputs a short-circuit current when the value is larger than α. 15 U receives this signal and outputs an OFF signal to the U-phase gate of the semiconductor circuit breaker 1 Circuit.
【００１０】Ｖ相の制御回路（ＣＴAUXV，１１V〜１
５V）及びＷ相の制御回路（ＣＴAUXW，１１W〜１５W）
もＵ相の制御回路と同様に構成されている。なお、１６
は高速サンプリング回路１１U〜１１W及び微分演算回路
１３U〜１３Wにクロックを出力するクロック回路、１７
は短絡判定回路１４U〜１４Wに設定値αを出力するα値
設定器、１８はＡ／Ｄ変換器１２U〜１２Wからのデータ
を記憶するデータメモリ、１９はそのデータを表示する
表示回路である。[0010] V-phase control circuit (CT AUXV , 11 V to 1
5 V ) and W-phase control circuit (CT AUXW , 11 W to 15 W )
Are configured similarly to the U-phase control circuit. Note that 16
A clock circuit for outputting a clock to the high-speed sampling circuit 11 U to 11 W and a differential operation circuit 13 U to 13 W, the 17
Is an α value setting device that outputs the set value α to the short-circuit determination circuits 14 U to 14 W , 18 is a data memory that stores data from the A / D converters 12 U to 12 W , and 19 is a display that displays the data. Circuit.
【００１１】フィーダに短絡が発生すると短絡電流ＩS
が図３のように流れる。微分演算回路１３U〜１３Wは各
相の短絡電流ＩSのｄＩ／ｄｔ値を演算する。このｄＩ
／ｄｔ値は短絡発生時の値（Ｉa／Ｔ）が最も大きい。
この短絡発生時の電流ｄＩ／ｄｔ値は、定格電流の立ち
上り時のｄＩ／ｄｔ値より大きい。しかして、α値設定
器１７により定格電流の立ち上り時のｄＩ／ｄｔ値に近
い値をα値として設定しておけば、短絡判定回路１４U
〜１４Wによって定格電流より大きい短絡発生時の電流
を瞬時に検出することができる。When a short circuit occurs in the feeder, a short circuit current I S
Flows as shown in FIG. Differential operation circuit 13 U to 13 W calculates the dI / dt value of each phase of the short-circuit current I S. This dI
As for the / dt value, the value (I a / T) when a short circuit occurs is the largest.
The current dI / dt value when this short circuit occurs is larger than the dI / dt value when the rated current rises. If a value close to the dI / dt value at the time of the rise of the rated current is set as the α value by the α value setting unit 17, the short circuit determination circuit 14 U
１４14 W makes it possible to instantaneously detect the current when a short circuit occurs that is larger than the rated current.
【００１２】したがって、短絡が発生するとその短絡電
流を瞬時に検出して短絡電流が最大値に達する前に半導
体遮断器１のゲートをＯＦＦとして短絡電流を遮断する
ことができる。よって定格の半導体遮断器で大短絡電流
をその低電流領域で遮断することが可能である
（Ｔ1）。短絡発生後３〜５サイクル（ＴCBF）で過電流
継電器３によって遮断器ＣＢFが遮断して安全を確保す
る（図１）。遮断器ＣＢFは半導体遮断器１の遮断完了
後に遮断となるので、定格の遮断器が使用可能となる。Therefore, when a short circuit occurs, the short circuit current can be detected instantaneously and the gate of the semiconductor circuit breaker 1 can be turned off before the short circuit current reaches the maximum value to cut off the short circuit current. Therefore, a large short-circuit current can be interrupted in the low current region by a rated semiconductor circuit breaker (T 1 ). Breaker CB F to ensure the safety by blocking with short circuit after 3-5 cycles (T CBF) by overcurrent relay 3 (Figure 1). Since breaker CB F becomes blocked after completion interruption of the semiconductor circuit breaker 1, the circuit breaker of the rated becomes available.
【００１３】[0013]
【発明の効果】本発明は、上述のとおり構成されている
ので、次に記載する効果を奏する。Since the present invention is configured as described above, the following effects can be obtained.
【００１４】（１）短絡電流の立ち上りを高速度で検出
し、半導体遮断器を遮断するので、大短絡電流をピーク
電流に達する前の低電流領域で遮断することが可能であ
る。(1) Since the rise of the short-circuit current is detected at a high speed and the semiconductor circuit breaker is shut off, the large short-circuit current can be interrupted in a low current region before reaching the peak current.
【００１５】（２）従って大容量系統への適用が可能と
なる。(2) Therefore, application to a large capacity system becomes possible.
【００１６】（３）同期遮断にも適用可能となる。(3) The present invention can also be applied to synchronization cutoff.
【図１】高速度大電流遮断装置の適用回路例を示すブロ
ック図。FIG. 1 is a block diagram showing an example of an application circuit of a high-speed large-current interrupting device.
【図２】制御部の回路構成を示すブロック図。FIG. 2 is a block diagram showing a circuit configuration of a control unit.
【図３】短絡電流検出と遮断時間を説明するグラフ。FIG. 3 is a graph illustrating short-circuit current detection and cut-off time.
１…半導体遮断器 ２…制御部 ３…交流過電流継電器 １１U〜１１W…高速サンプリング回路 １２U〜１２W…Ａ／Ｄ変換器 １３U〜１３W…微分演算回路 １４U〜１４W…短絡判定回路 １５U〜１５W…ゲートＯＦＦ信号を出力するバッファ回
路 １６…クロック回路 １７…短絡判定設定値αの設定器 １８…データメモリ １９…データ表示器 ５１…交流過電流継電器 Ａ1，Ａ2…高速度大電流遮断装置 Ｂ…系統母線 ＣＢF…フィーダ遮断器 ＣＴ…変流器 ＣＴAUXU〜ＣＴAUXW…補助変流器 Ｆ1，Ｆ2…フィーダ α…短絡判定設定値 ＩS…短絡電流 Ｔ…短絡電流検出時間 Ｔ1…半導体遮断器の遮断時間 ＴCBF…フィーダ遮断器の遮断時間1 ... semiconductor breaker 2 ... controller 3 ... AC overcurrent relay 11 U to 11 W ... Fast sampling circuit 12 U ~12 W ... A / D converter 13 U to 13 W ... differential operation circuit 14 U to 14 W ... Short circuit judgment circuit 15 U to 15 W ... Buffer circuit for outputting a gate OFF signal 16 ... Clock circuit 17 ... Setter for short circuit judgment set value α 18 ... Data memory 19 ... Data display 51 ... AC overcurrent relay A 1 , A 2 ... high-speed large-current interrupting device B ... system bus CB F ... feeder breaker CT ... current transformer CT AUXU ~CT AUXW ... auxiliary current transformer F 1, F 2 ... feeders alpha ... shorting decision set value I S ... short Current T: Short-circuit current detection time T 1 : Break time of semiconductor breaker T CBF : Break time of feeder breaker
Claims (2)
値を求めて所定の値と比較することで、短絡電流をその
立ち上り時に検出して前記半導体遮断器を遮断させる制
御部とからなり、 短絡電流をピークに達する前の低電流領域で遮断するこ
とを特徴とする高速度大電流遮断装置。1. A semiconductor circuit breaker, wherein a current flowing through the semiconductor circuit breaker is detected, and a differential value of the current is obtained and compared with a predetermined value. A high-speed, large-current interrupting device, comprising: a control unit that interrupts a short-circuit current in a low-current region before reaching a peak.
的遮断器と直列に接続されていることを特徴とする高速
度大電流遮断装置。2. The high-speed, high-current circuit breaker according to claim 1, wherein the semiconductor circuit breaker is connected in series with the mechanical circuit breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26644196A JPH10112926A (en) | 1996-10-08 | 1996-10-08 | High-speed large-current interrupting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26644196A JPH10112926A (en) | 1996-10-08 | 1996-10-08 | High-speed large-current interrupting apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10112926A true JPH10112926A (en) | 1998-04-28 |
Family
ID=17430982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26644196A Pending JPH10112926A (en) | 1996-10-08 | 1996-10-08 | High-speed large-current interrupting apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10112926A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006524028A (en) * | 2003-04-17 | 2006-10-19 | エネル ディストリビュズィオーネ ソシエタ ペル アチオニ | Electric circuit breaker |
| JP2008113526A (en) * | 2006-10-31 | 2008-05-15 | Hitachi Appliances Inc | Load driver with protective features |
-
1996
- 1996-10-08 JP JP26644196A patent/JPH10112926A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006524028A (en) * | 2003-04-17 | 2006-10-19 | エネル ディストリビュズィオーネ ソシエタ ペル アチオニ | Electric circuit breaker |
| JP4920890B2 (en) * | 2003-04-17 | 2012-04-18 | エネル ディストリビュズィオーネ ソシエタ ペル アチオニ | Electric circuit breaker |
| JP2008113526A (en) * | 2006-10-31 | 2008-05-15 | Hitachi Appliances Inc | Load driver with protective features |
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|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20040511 |