Analysis and treatment of the discharge fault of 500kV main transformer of a pumped storage power station

Huadian Technology ›› 2009, Vol. 31 ›› Issue (11): 34-35.

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Analysis and treatment of the discharge fault of 500kV main transformer of a pumped storage power station

CHEN Jiehua, LIN Chunyao, YAO Senjing

Guangdong Power Test & Research Institute, Guangzhou 510600, China

Received:1900-01-01 Revised:1900-01-01 Online:2009-11-25 Published:2009-11-25

Abstract

Abstract: The singlephase earth fault occurred in operation of 500kV main transformer in a pumped storage power station. By inspection of the inner parts of the transformer and analysis, it is found that a discharge fault in long oil gaps between the grading ring in oil of highvoltage bushing and the yoke was occurred. Through repairing and treatment, the discharge fault of the transformer had been eliminated basically.

Key words: 500kV main transformer, single-phase earthing, discharge in long oil gaps, fault analysis, treatment

CHEN Jiehua;LIN Chunyao;YAO Senjing. Analysis and treatment of the discharge fault of 500kV main transformer of a pumped storage power station[J]. Huadian Technology, 2009, 31(11): 34-35.

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Analysis and treatment of the discharge fault of 500kV main transformer of a pumped storage power station

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