JP2016015236A5

JP2016015236A5 -

Info

Publication number: JP2016015236A5
Application number: JP2014136445A
Authority: JP
Filing date: 2014-07-02
Publication date: 2017-08-10
Anticipated expiration: 2034-07-02

Description

該図に示すように、本実施例の転流式直流遮断器１４は、直流電源９と負荷１０を接続する主回路１に直列に挿入された主開閉器３と、この主開閉器３に直列に接続された副開閉器４と、主開閉器３と副開閉器４との間に接続された可飽和リアクトル８と、主開閉器３と可飽和リアクトル８との直列回路に対して並列接続されたエネルギ吸収非直線抵抗体７と、主回路１の過電流を検出する電流検出器１２と、図１に点線矢印で示すように、主開閉器３、副開閉器４、転流スイッチ５、転流回路形成スイッチ５ａのそれぞれに開閉指令を出す駆動指令装置１３と、転流スイッチ５と転流用コンデンサ６及び転流用コンデンサ６を介して転流スイッチ５の反対側に設けられた転流回路形成スイッチ５ａが直列に接続されて構成され、主開閉器３に並列に接続された転流回路２と、転流用コンデンサ６に電荷を蓄積するコンデンサ充電装置１１（転流用コンデンサ６は、コンデンサ充電装置１１により予め主回路１と逆の極性に充電されている）と、転流回路２に接続され転流用コンデンサ６の電圧を測定する計測用変圧器１５と、この計測用変圧器１５で測定した転流用コンデンサ６の電圧変動を検出する検出ユニット１６と、この検出ユニット１６で検出された信号を基に、転流スイッチ５及び転流回路形成スイッチ５ａが開路（点弧失敗）であることを表示し、警報を出す監視装置１７とから概略構成されている。 As shown in the figure, a commutation type DC circuit breaker 14 of this embodiment includes a main switch 3 inserted in series in a main circuit 1 connecting a DC power source 9 and a load 10, and the main switch 3. Parallel to the series circuit of the main switch 3 and the saturable reactor 8, the sub switch 4 connected in series, the saturable reactor 8 connected between the main switch 3 and the sub switch 4, and the main switch 3. A connected energy absorbing nonlinear resistor 7, a current detector 12 for detecting an overcurrent of the main circuit 1, and a main switch 3, a sub switch 4, a commutation switch as indicated by a dotted arrow in FIG. 5, a drive command device 13 for issuing an opening / closing command to each of the commutation circuit formation switches 5a, a commutation switch 5, a commutation capacitor 6, and a commutation switch provided on the opposite side of the commutation switch 5 via the commutation capacitor 6. The flow circuit forming switch 5a is connected in series, and the main switch 3 The commutation circuit 2 connected in parallel and the capacitor charging device 11 that accumulates electric charge in the commutation capacitor 6 (the commutation capacitor 6 is charged in advance with the opposite polarity to the main circuit 1 by the capacitor charging device 11). A measurement transformer 15 connected to the commutation circuit 2 for measuring the voltage of the commutation capacitor 6, a detection unit 16 for detecting the voltage fluctuation of the commutation capacitor 6 measured by the measurement transformer 15, On the basis of the signal detected by the detection unit 16, the commutation switch 5 and the commutation circuit formation switch 5a are generally configured from a monitoring device 17 that displays that the circuit is open (failed to fire) and issues an alarm. .

Claims

Via a main switch inserted in series in a main circuit connecting a DC power supply and a load, a sub switch connected in series to the main switch, a commutation switch, a commutation capacitor, and the commutation capacitor A commutation circuit forming switch provided on the opposite side of the commutation switch is connected in series, and a commutation circuit connected in parallel to the main switch, and a capacitor for storing electric charge in the commutation capacitor A charging device; a measurement transformer connected to the commutation circuit for measuring the voltage of the commutation capacitor; and a detection unit for detecting voltage fluctuation of the commutation capacitor measured by the measurement transformer,
Based on the voltage fluctuation of the commutation capacitor detected by the detection unit, the closed circuit of the commutation switch and the commutation circuit forming switch for discharging the charge charged in the commutation capacitor is monitored. A commutation type DC circuit breaker.

The commutation type DC circuit breaker according to claim 1,
When the detection unit detects that the voltage of the commutation capacitor does not fluctuate, it is determined that the commutation switch and the commutation circuit forming switch are open .

The commutation type DC circuit breaker according to claim 2,
If the detection unit detects that no commutation current is passed through the commutation circuit without changing the voltage of the commutation capacitor, it is determined that the commutation switch and the commutation circuit formation switch are open. A commutation type DC circuit breaker characterized by

In the commutation type DC circuit breaker according to any one of claims 1 to 3,
Based on the signal detected by the detection unit, the commutation type is provided with a monitoring device that displays that the commutation switch and the commutation circuit formation switch are in an open state and issues an alarm. DC circuit breaker.

Via a main switch inserted in series in a main circuit connecting a DC power supply and a load, a sub switch connected in series to the main switch, a commutation switch, a commutation capacitor, and the commutation capacitor A commutation circuit forming switch provided on the opposite side of the commutation switch is connected in series, and a commutation circuit connected in parallel to the main switch, and a capacitor for storing electric charge in the commutation capacitor A charging device; a measurement transformer connected to the commutation circuit for measuring the voltage of the commutation capacitor; and a detection unit for detecting a voltage fluctuation of the commutation capacitor measured by the measurement transformer. In monitoring the commutation type DC circuit breaker,
The closed circuit of the commutation switch and the commutation circuit forming switch for discharging the charged electric charge of the commutation capacitor is monitored based on the voltage fluctuation of the commutation capacitor detected by the detection unit. Monitoring method for commutation type DC circuit breakers.

In the monitoring method of the commutation type DC circuit breaker according to claim 5,
When the detection unit detects that the voltage of the commutation capacitor does not fluctuate, it is determined that the commutation switch and the commutation circuit forming switch are open .

In the monitoring method of the commutation type DC circuit breaker according to claim 6,
If it is detected by the detection unit that the commutation current is not supplied to the commutation circuit without changing the voltage of the commutation capacitor, it is determined that the commutation switch and the commutation circuit forming switch are open. A method for monitoring a commutated DC circuit breaker.

In the monitoring method of the commutation type DC circuit breaker according to any one of claims 5 to 7,
Wherein based on the signal detected by the detecting unit, said commutation switch and the commutation circuit forming the switch is open circuit and displayed on the monitoring device, the commutation type DC breaker, characterized in that alerting Monitoring method.

In the monitoring method of the commutation type DC circuit breaker according to claim 8,
By detecting a decrease in the charging voltage of the commutation capacitor with the detection unit, the failure failure of the commutation type DC circuit breaker is displayed on the monitoring device, and the commutation type DC circuit breaker is faulty. A method for monitoring a commutation type DC circuit breaker, characterized in that a command to open the upper circuit breaker and the feeding circuit breaker that are sometimes opened is provided.