Analysis of the Effect on Protection during Loop Closing Operation in 10kV Distribution Network

Several types of loop closing operation in 10kV distribution network are introduced.The influential factors of the steady state current are analyzed.According to the setting principle of feeder protection,the effect of the protection misoperation caused by the surge current and the steady state current during the loop closing operation is analyzed.The issue of the protection sensitivity is discussed and the practical criterion to analyze the effect on protection during the loop closing operation is introduced,it is significant to instruct the loop closing operation.