电瓷避雷器Issue(5)：70-76,7.DOI:10.16188/j.isa.1003-8337.2025.05.009
并联电容器过电压事故分析及其抑制措施现场测试验证
Overvoltage Accidents in Shunt Capacitors and Field Testing Verification of Suppression Measures
摘要
Abstract
The operation overvoltage generated by circuit breaker when switching capacitors is easy to cause overvoltage accidents in the electric power system.Through the analysis of a main transformer trip-ping accident at a certain substation,it can be concludes that the main cause of this accident is the oper-ation overvoltage generated by 35 kV vacuum circuit breaker when switching shunt capacitors,which re-sulting in insulation breakdown within the switchgear and subsequently leading to three-phase grounding short circuit.Based on this,the author utilize RC snubber to suppress the operation overvoltage generated by circuit breaker when switching capacitors,and verified the effectiveness of this suppression measure through on-site test.The accident analysis and test results concluded thatthe protection scheme with the installation of a RC snubber can effectively suppress the switching overvoltage generated by the circuit breaker switching capacitors in the substation,as proven by on-site comparative testing;For substations where similar accidents have occurred,it is recommended to install RC snubber to reduce the amplitude and frequency of operational overvoltage,in order to control its impact range and degree of damage.关键词
操作过电压/真空断路器/35kV并联电容器/阻容吸收器/过电压抑制Key words
operating overvoltage/vacuum circuit breaker/35 kV shunt capacitor/RC snubber/overvolt-age suppression引用本文复制引用
马钶昊,刘志林,王琼,刘涛玮,付文光,刘鑫荣..并联电容器过电压事故分析及其抑制措施现场测试验证[J].电瓷避雷器,2025,(5):70-76,7.基金项目
内蒙古电力公司项目(No.2023-4-3).Project supported by Inner Mongolia Electric Power company Projects(No.2023-4-3). （No.2023-4-3）
