35 kV不接地系统谐振事故及抑制措施仿真分析

该文对一起35 kV不接地系统谐振事故进行分析。通过在PSCAD中搭建仿真模型,模拟电容器组在各种退出方式下PT的电压、电流变化情况。通过事故全过程分析,得出断路器重燃是这次事故的主要原因。针对此次故障,还通过仿真选出合适的谐振抑制措施。

In this paper,a resonant accident of 35 kV ungrounded system is analyzed.By building a simulation model in PSCAD,the voltage and current changes of PT under various exit modes of capacitor banks are simulated.Through the analysis of the whole process of the accident,it is concluded that the reignition of the circuit breaker is the main cause of the accident.In view of this fault,the appropriate resonance suppression measures are selected by simulation.