并联补偿电容对限流器运行影响的仿真研究

Simulation research on the effect of the paralleled compensating capacitor on the solid state fault current limiter operation

当发生短路故障时,限流器通过插入等效限流电抗来限制短路电流。此等效限流电抗主要是感性的,因此与系统中的容性负载作用可能发生谐振,产生不利影响。对感性负荷带并联补偿电容的情况下,新型桥式固态限流器(不带旁路电感和带旁路电感)采用预触发与不采用预触发时的运行工况及是否会产生谐振进行了理论分析与比较,并通过系统仿真对分析结果进行了验证。

The fault current limiter inserts the impedance to limit the fault current when the fault happens. Since the limiting impedance is inductive, it may bring the resonance with capacitive load and does harm to power system. In the paper, in the situation of paralleling a compensating capacitor with the inductive load, the operation and resonance situation is compared and analyzed theoretically when the new bridge type solid-state fault current limiter （both with paralleled inductance and not） is pre-triggered or not. It is proved to be valid through system simulation.