安装固态短路限流器后距离保护整定的改进方法

Improved Setting Method of Distance Protection with the SSFCL

故障限流器在电力系统中应用时将对继电保护尤其是距离保护产生一定的影响。以带旁路电感变压器耦合三相桥式固态限流器为例,详细分析了其对距离保护产生的影响,提出了一种应用于装设固态限流器线路的距离保护整定新方法,并通过仿真验证了所提出的方法可以有效消除限流器对距离保护的不利影响。

The fault current limiter （FCL） has certain impact on relaying protection, especially on distance protection, when applied in power systems. This paper studies the effect of the bridge type solid state fault current limiter （SSFCL） with bypass inductance on distance protection. An improved setting method of distance protection for the SSFCL-equipped transmission line is proposed. Simulation study further demonstrates that the proposed method can effectively eliminate the unwanted effect of SSFCL on distance protection.