SF_6高压断路器分解物的分析及对策

Analysis on SF_6 High Voltage Circuit Breakers Decomposition and Countermeasures for Improvement

阐述了SF6气体分解机理,分析了高压断路器正常运行及切断故障电流气体分解物的变化情况及对应关系,并结合500 kV五邑站500 kV开关在台风期间开关动作情况,对SF6中气体含量产生和升高的原因进行了分析研究,了解分解物的危害,同时提出相应对策,提高SF6断路器安全运行的可靠性。

This paper describes the decomposition mechanism of SF6 gas,and the decomposition of SF6 gas on normal operation and the decomposition when fault current is cut off are compared.Combined with the 500 kV switching action during typhoons in 500 kV Wuyi substation,the generation and the increase of SF6 gas content were analyzed and researched to understand the harm of decomposition,and corresponding strategies are put forward to improve the reliability of the safe operation of SF6 circuit breaker.