针对当前母线充电试验时继电保护中存在的一些问题，提出了一种智能型的母线充电保护新方法。

Aimed at the problems of relay protection during charging test of the buses, a new method of intelligent bus-charging protection is presented in this paper.

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试验结果表明，限流器可以有效限制短路电流的峰值和有效值，对于母线电压跌落也有较好的抑制效果。

Experimental results showed that the fault current limiter was effective in curbing the short-circuit current peak and RMS, and it also performed well on inhibiting the bus voltage drop.

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试验证明上述方法在发生电压暂降时，很好的支撑了变频器直流母线电压使其保持基本不变，有效地降低了电压暂降对变频调速装置的影响。

Experiment results show that the proposed method can support the inverter DC bus voltage, and reduce the impact of voltage sags on VFD effectively.

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