The principle, testing of generator stator ground protection based on the third harmonics, measurement of the third harmonics on generator stator are introduced.

介绍了漫湾电厂发电机3ω定子接地保护原理、调试方法及发电机定子三次谐波电压的测试。

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In this paper, the operation style of the 100% stator ground protection based on twice frequency separation is analysed, and the feasible improving scheme is put forward.

文章在分析100%定子接地保护动作方式的基础上，对其提出了可行的改进方案。研究结果表明，改进方案能更好地保证发电机安全并有利于电力系统稳定。

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Through cooperating each other between the generator stator ground protection, it can operate sensitively when single phase ground fault in whole range of generator stator winding occurs.

通过发电机定子接地保护之间的相互配合，在整个发电机定子绕组范围内发生单相接地故障时，发电机定子接地保护均能灵敏地动作。

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