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《Electric Power Science and Engineering》 2007-02
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Study on One-point Grounding Fault for Digtal Generator Protection

ZHANG Bo (Jincheng Power Supply Company of SEPC,Jincheng 048000,China)  
According to the fact that one point grounding fault of generator exciting winding occurs when a generator is really running in use,a better solution of variable bridge type microcomputer protection for one point grounding fault of generator exciting winding is demonstrated in this paper.The equations for grounding resistance and ground location calculations are derived.A more reasonable circuit structure is chosen through the theory analysis of sensitivity and the reality is considered.This paper also analyze the real problems of the grounding protection and put forward the way of improving the sensitivity and reliabifity.
【CateGory Index】: TM862
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