This paper discusses unbalance phenomenon caused by zero-voltage-switch of TSC, quantitative analysis of the unbalance in certain conditions and research of the influence to the relaying protection caused by unbalance are presented.

• 探讨了晶闸管开关投切电容器(sc)的无功静止补偿装置因晶闸管开关过零平滑投切而产生的不平衡现象，定量分析了在特定条件下不平衡量的大小，同时研究了这种不平衡对继电保护装置的影响。