10kV并联电容器分相合闸策略研究

Research on Phase Closing Strategy of 10kV Shunt Capacitor

根据江门某变电站运行数据,在PSCAD中建立一种分相合闸策略并联电容器的仿真分析模型。通过仿真实验,得出普通断路器的合闸涌流为稳态运行电流的5倍左右;采用A-C-B三相依次合闸策略(分相合闸策略)的涌流为稳定运行电流的2.2倍左右;普通断路器合闸过电压为稳态运行电压的1.5倍左右;而分相合闸过电压约为稳态运行的1.2倍左右。由此可以得出分相投切策略能够减小合闸涌流对电容器的冲击和过电压对电容器的影响。

A simulation model of shunt capacitor based on phase closing strategy is established in PSCAD.According to the service data of a substation in Jiangmen.Through simulation experiment,the ordinary closing inrush current of the circuit breaker is about 5 times of the steady-state operation.Adopting A-B-C three-phase switching strategy(split phase switching)current is about 2.2 times of the steady-state operation.The ordinary closing inrush voltage of the circuit breaker is about 1.5 times of the steady-state operation.Split phase switching voltage is about 1.2 times of the steady-state operation.