通过对中性点不接地配电网单相接地故障时零序全电流的分析，得出了利用零序全电流的大小和方向进行故障选线的新方法。
By analyzing the zero-sequence full current for single-phase grounding fault in isolated neutral distribution network, a new approach to determine the faulty transmission line is obtained.
通过对气隙转矩的计算处理，利用小波脊线提取气隙转矩中转子断条故障特征频率分量，克服了分析定子电流信号时的不足，实现了电机转子断条故障的在线监测。
The broken bars faulty can be on-line monitored by extracting feature component based on wavelet ridge. Calculation of air-gap torque overcomes the disadvantages which based on current signal.
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