电瓷避雷器Issue(4)：44-55,12.DOI:10.16188/j.isa.1003-8337.2026.04.006
500kV变电站SF6断路器投切并联电容/电抗器过电压现场测试
Feild Test on Over-Voltages of Shunt Capacitors and Reactors Switched by SF6 Circiut Breakers in 500 kV Substation
摘要
Abstract
The new type of power system has imposed new requirements on the reactive power regulation capacity of the system.The switching frequency of traditional parallel reactors and capacitor bands has in-creased,and the failure rate has risen sharply.To investigate the causes of faults in parallel reactors and capacitor banks,a test system was developed to monitor 10 voltage signals simultaneously,with a sam-pling frequency of 100 MHz per channel.Using this test system,on-site tests were conducted to monitor SF6 circuit breaker operations-specifically,switching on and off parallel capacitors and reactors-at three different 500 kV substations,for a total of 80 tests in five intervals.The overvoltage suppression performance of RC snubbers was also evaluated.Based on the field test results,the voltage characteristics during opening and closing operations of parallel reactors and capacitor banks interrupted by SF6 circuit breakers were clarified;the statistical features of characteristic quantities such as the expected through and over-voltage-multiples were obtained,and the effectiveness of RC snubbers in suppressing both switching-on and switching-off overvoltages was quantified.In addition,a new set of key problems about suppressing the overvoltages of the parallel reactors and capacitor banks was also proposed.关键词
SF6断路器/并联电容器/并联电抗器/操作过电压/现场测试Key words
SF6 circuit breaker/shunt capacitor/shunt reactor/switching over-voltage/field test in sub-station引用本文复制引用
王琼,刘志林,辛力坚,付文光,刘鑫荣,马钶昊,李宏祥,艾博..500kV变电站SF6断路器投切并联电容/电抗器过电压现场测试[J].电瓷避雷器,2026,(4):44-55,12.基金项目
内蒙古电力(集团)有限责任公司指令攻关项目(No.2023-4-3).Project supported by Mandatory Project for Tackling Key Problems of Inner Mongolia Power(Group)Co.,Ltd.(No.2023-4-3). （集团）
