Analysis and Countermeasures of A 110 kV Substation Overstep Tripping Accident
Overclass tripping in substations can prolong the fault time and expand the scope of power outages,which has attracted great attention.The article deeply analyzes a case of a 110 kV substation over level tripping accident from the aspects of substation operation mode,accident process,accident analysis,and accident handling,and concludes that the fundamental reason for the over level tripping was the lack of maintenance of the direct current system.Finally,targeted maintenance measures for the direct current system are proposed,which can effectively avoid the occurrence of over class tripping accidents caused by direct current power loss during faults.
overstep trippingsubstationdirect current systemaccident casepower system
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