大型发电机组中性点接地方式若干问题的探讨

Inquisition into Some Issues of Large Generator Unit Neutral-point Grounding Mode

对国内电力系统大型发电机组中性点采用2种不同接地方式以及不同讨论观点进行了详细介绍。结合具体工程实例对接地电阻选取原则、不同接地方式下发电机定子单相接地电流比较、对发电机定子铁芯的危害以及定子单相接地保护等方面展开分析和讨论,并提出一些建议。

The paper introduces 2 different ground modes used for domestic large generation unit neutral points and different view points in details. It also analyzes and discusses about ground resistance selecting principles, comparison of generator stator single-phase ground current under different grounding modes, stator core harmfulness, and stator single-phase ground protection in combination with concrete projects, and gives out some comments.