Analysis of disconnection fault of two 110 kV transmission line
More than 90%of the fault causes of 110 kV power lines are single-phase fault grounding of the lines;when a fault occurs on a line,the fault can be removed by the action of the relay protection device installed on the line.In this paper,two cases of 110 kV transmission line protection actions are identical,but the different consequences are caused by the difference in line fault nature;the logic of the protective device action of the two accidents was verified by the calculation of the short-circuit current with the symmetrical component method.The research results can provide a theoretical basis for the analysis of 110 kV line fault and accident treatment.
earthingpower systems protectionaccident treatment
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