Effect of Synchronous Switching Technique on Performance of Circuit Breaker in Breaking Capacitor Bank

FANG Chun’en; LI Wei; REN Xiao; CHENG Xueli; ZHANG Bide

doi:10.13296/j.1001-1609.hva.2017.12.011

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Effect of Synchronous Switching Technique on Performance of Circuit Breaker in Breaking Capacitor Bank

更新时间：2025-04-26

- Effect of Synchronous Switching Technique on Performance of Circuit Breaker in Breaking Capacitor Bank
- High VoltageApparatus Vol. 53, Issue 12, Pages: 67-73(2017)
- 作者机构：
  
  西华大学电气与电子信息学院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2017.12.011
  CLC： TM53
- Published：2017
- 稿件说明：
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[1]李伟,方春恩,李伟,任晓,程雪丽,张彼德.同步开关技术对提高开断电容器组性能的研究[J].高压电器,2017,53(12):67-73.

FANG Chun’en, LI Wei, REN Xiao, et al. Effect of Synchronous Switching Technique on Performance of Circuit Breaker in Breaking Capacitor Bank[J]. High voltageapparatus, 2017, 53(12): 67-73.
[1]李伟,方春恩,李伟,任晓,程雪丽,张彼德.同步开关技术对提高开断电容器组性能的研究[J].高压电器,2017,53(12):67-73. DOI： 10.13296/j.1001-1609.hva.2017.12.011.

FANG Chun’en, LI Wei, REN Xiao, et al. Effect of Synchronous Switching Technique on Performance of Circuit Breaker in Breaking Capacitor Bank[J]. High voltageapparatus, 2017, 53(12): 67-73. DOI： 10.13296/j.1001-1609.hva.2017.12.011.

摘要

断路器在开断电容器组时引发的重击穿过电压可破坏设备绝缘

对电网的安全运行构成威胁。采用同步开关技术合理延长燃弧时间

可有效降低重击穿概率。文中结合弧隙介质恢复理论与断路器同步关合特性

根据重击穿的判据条件

提出了一种重击穿概率计算新方法

从数理角度分析了触头分离时间、断路器绝缘强度上升率对重击穿概率的影响;再通过35 kV永磁真空断路器动态预击穿试验得到其绝缘介质恢复特性

利用上述计算方法并结合试验数据得出:在分闸动作时间最大允许偏差为±2 ms时

将选相控制器的预设燃弧时间选择在4

ms范围内

可实现开断电容器无重击穿

为选相切除电容器组提供了一定的技术参考。

Abstract

The restrike over-voltage induced in breaking capacitor bank by a circuit breaker may damage equipment insulation

and harm safety of power system.In this case

the synchronous switching technology can be adopted to reasonably extend arcing time

hence to reduce restrike probability.This paper combines the theory of dielectric recovery of arc gap with the synchronous closing characteristic of circuit breaker and considers the criterion of restrike to propose a new calculation method of restrike probability

and analyzes the effects of the contact separation time and the rate of rise of dielectric strength（RRDS） on the restrike probability.Dynamic pre-strike tests of a 35 kV PMA vacuum brea

ker are conducted to obtain its RRDS.Results show that when the maximum allowable deviation of opening operation time is ±2 ms and the preset arcing time of controlled switching device is 4

no restrike will happen in breaking capacitor bank.This study may provide a reference for control of breaking capacitor banks.

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