【摘要】 介绍了电容器内部故障保护方式大多采用桥式差流保护公式的推导过程及求解方法,并通过计算实例分别求出元件故障击穿被隔离后,同一串联段完好元件的过电压倍数、故障电容器的过电压倍数及不平衡电流值,为产品运行提供参照。最后给出了求解的计算程序。更多还原

【Abstract】 This paper introduces the deduce process and resolvent method of the protection formula of the differential current bridge which is adopted mostly to protect the internal fault in power capacitor. Through a practical example, the multiple of the overvoltage both in healthy elements and in fault elements is calculated respectively. Meanwhile, the unbalance current in fault elements is also obtained. Finaly, the resolvent procedure is given.更多还原