Analysis and treatment of 390H generator shaft current abnormity

Abstract

Abstract:

The hazards and monitoring methods of generator shaft current are introduced.Through the analysis and troubleshooting of the generator shaft current abnormality,the initial causes of the shaft current abnormality which are the generator side shaft end and the excitation shell air seal rubbing, and the journal electric corrosion at the grounding brush are obtained.After the rubbing phenomenon disappears,the metal material remaining at the shaft end is shortcircuited with the oil seal,causing the shaft current to appear at the cold start;at the same time,the grounding brush is poorly contacted due to the journal erosion at the grounding brush,making the shaft current difficult to be completely eliminated. Targeted treatment for different reasons provide reference for generator operation and maintenance.

Key words:

">">Analysis and treatment of 390H generator shaft current abnormity">

JIANG Xiaofeng， NIU Zhifeng.

Analysis and treatment of 390H generator shaft current abnormity

[J]. Huadian Technology, 2019, 41(4): 68-70.

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Analysis and treatment of 390H generator shaft current abnormity

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