The drawbacks of present stator ground fault protection principle for the small and medium sized generators are pointed out.

指出了现有中小型发电机定子接地保护原理的不足。

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Based on the analysis of a typical stator ground fault and its recording data, the protection action is proved to be correct.

通过对一次典型的定子接地故障情况和保护录波数据分析，证明了保护动作行为的正确性。

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Furthermore, a checkout method for the third harmonic voltage based protection scheme of stator ground fault in generators is presented based on the verified MLM-FEM coupled model.

进而提出了基于多回路-有限元耦合数学模型的同步发电机定子单相接地故障三次谐波电压保护方案校验方法。

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