College of Electronic and Information Engineering;
Guangdong Ocean University;
Zhanjiang 524088;
Guangdong;
China;
College of Electrical and Control Engineering;
Heilongjiang University of Science and Technology;
Harbin 150022;
China;
Handan Power Supply Company;
Handan 056002;
Hebei;
China;
transformer fault; improved imperialist competitive algorithm; rough set; attribute reduction; BP neural network;