Analysis of a 220 kV AC Double Circuit Line Simultaneous Tripping Accident
Lightning strike tripping is the main cause of line tripping,and fault analysis is an important link to determine the fault point and solve the accident.This article takes a 220 kV AC double-circuit line simultaneous tripping accident due to lightning strike as an ex-ample,the involved single-phase action single-phase reclosing,remote tripping action,and bus differential protection follow-up action,bus differential failure protection action are organized.Then,the tripping process according to the method of dividing states is analyzed based on waveform recording and protection action principles.Finally,the correctness of the protective action based on the actual situa-tion is analyzed.The result shows that the above method can be used to clearly analyze the protection tripping and the correctness of pro-tective actions,providing reference for on-site analysis of complex tripping accidents.
万方数据
