撤除外熔丝消除保护误动

Elimination Protection Malfunction by Removal of External Fuse

分析了宝安站35 kV并联电容器外熔断器误动的原因,比较了外熔断器和内熔丝的运行特点。针对宝安站并联电容器的具体情况,分析了取消外熔丝、只使用内熔丝和继电保护的可行性,并以单芯电缆替换原先的外熔断器对电容器组进行改造,经过一年多时间运行检验,说明该方法有效可行,提高了电容器运行可靠性,减轻了运行维护工作量。

The cause of malfunction of external fuse of 35 kV shunt capacitor at Bao＇an station is ana- lyzed and operating characteristics of external fuse and internal fuse is compared. For the specific cir- cumstance of shunt capacitor at Bao＇an station, the feasibility of removing external fuse and only u- sing the internal fuse and relaying protection. The capacitor bank can be modified by way of repla- cing original external fuse with single core cable. Through more than one-year operation, it is proved that the method is feasible, the operation reliability is improved and the maintenance work is re- duced.