Based on the analysis of AC impedance and two poles voltage test data, the reason of turn - to - turn short circuit fault caused by having copper dregs in generator rotor winding was found.
基于交流阻抗和两极电压试验数据的分析，发现发电机转子绕组因存在铜渣而造成匝间短路故障的原因。
The influence of CT turn ratio to high impedance differential protection is analyzed, and the method of measuring turn ratio error is also introduced.
分析了CT匝[数]比误差对高阻抗差动保护的影响，并介绍了匝[数]比误差的测量方法。
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