直流滤波器C_1电容器过电压校核

Overvoltage Verification for C_1 Capacitor of DC Filter

为了减小直流滤波器频繁动作造成的影响,保证C_1不平衡保护能准确地发现C_1电容器的故障,对C_1电容器的过负荷能力进行了核算,核算结果表明目前的C_1电容器不平衡保护定值过于灵敏,可以适当提高保护定值以满足直流滤波器的正常运行要求,同时遏制C_1电容器组的故障范围扩大。

In this paper,the overload ability of C1 capacitor is verified in order to reduce the influence due to frequent operation of the DC filter and assure to find the fault of the C1 capacitor correctly by the C1 imbalance protection. It is shown by the verification result that the imbalance protection setting of present C1 capacitor is too sensitive,the normal operation requirement of the DC filter can be met by way of increasing the protection setting appropriately and,at the same time,the fault development of the C1 capacitor can be blocked.