神保串补不平衡保护误动分析

Analysis of Misoperation of Unbalance Protection on Series Compensation in Shenbao Substation

针对神保串补投运以来发生的几起不平衡保护误动事故,文章对串补不平衡保护原理进行了详细的介绍。通过对保护电流录波的分析,确认保护误动为旁路断路器合闸瞬间产生谐波电流所致,并提出了预防不平衡保护误动的合理措施。

According to some faults of unbalance protection misoperation since the series compensation in Shenbao Substation was put into service,this paper introduced in detail the principle of unbalance protection on series compensation.Through the analysis of the protection current waveform,it considered that the protection misoperation is caused by the resonance current produced in switching on moment of by-pass breaker,also the rational measure for preventing the misoperation of unbalance protection was proposed.