高压电器2017，Vol.53Issue(6)：135-140,6.DOI:10.13296/j.1001-1609.hva.2017.06.023
12kV真空断路器开合无功补偿回路的过电压分析
Overvoltage Analysis of 12 kV Vacuum Circuit Breaker Switching Reactive Power Compensation Circuit
范广伟 1樊楚夫 1李刚 1黄实 1史宏伟1
作者信息
- 1. 西安高压电器研究院有限责任公司,西安710077
- 折叠
摘要
Abstract
Capacitor banks is one of the important reactive power compensation installaton in power system.Usually vacuum circuit breaker is used for switching such installation.It will produce the overvoltage when the restrike occurs in the vacuum circuit breaker opening capacitor banks.The overvoltage may damage vacuum circuit breakers,capacitors or other electrical equipment.With actual operation,the vacuum circuit breaker is usually used in the cable system for reactive power compensation circuit.So the existence of the parasitic capacitance in the system will inevitably involved in the process of the vacuum circuit breaker switching capacitor banks.In this paper,combined with typical compensation circuit in thesubstation,the distribution of the parasitic capacitance is analyzed for the impact of the vacuum circuit breaker opening capacitor banks when the overvoltage appears.Through the equivalent experiment carried out in the laboratory,it is proved that the parasitic capacitance branch current for the power side and load side has been existed.The branch current is of high frequency and high amplitude.In this case,the overvoltage waveforms and data have been obtained when the restrike occurs in the vacuum circuit breaker opening capacitor banks.The results show that,due to the existence of the parasitic capacitance for compensation circuit,which has influence on the overvoltage of vacuum circuit breaker switching capacitor banks.So,the parasitic capacitance should be considered in the overvoltage analysis of vacuum circuit breaker switching capacitor banks.关键词
真空断路器/电容器组/暂态过程/过电压/寄生电容Key words
vacuum circuit breaker/capacitor banks/transition process/over-voltage/parasitic capacitance引用本文复制引用
范广伟,樊楚夫,李刚,黄实,史宏伟..12kV真空断路器开合无功补偿回路的过电压分析[J].高压电器,2017,53(6):135-140,6.
