Cause and Countermeasure for Grounding Fault of Substation DC System
The DC system of substation is generally com-posed of DC bus,charging device and battery.As an im-portant load power source for protection,measurement and control device,circuit breaker control power source in substations,DC system plays a very important role in the safe and stable operation of the substation.Grounding fault of DC system is a common fault type in substations,which has serious harm to the reliable operation of prima-ry equipment in substations.This paper first analyzes the types and causes of DC system grounding faults in substa-tions,introduces several methods for judging DC system grounding faults in substations,and puts forward coun-termeasures of DC system grounding faults in substations,aiming at providing reliable support and guarantee for the stable operation of substation DC system.
substation DC systemgrounding faultpower interconnection groundingbranch grounding fault
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