Fault diagnosis of transformer based on BP network pattern identification

method of fault diagnosis on-line based on BP networks pattern identification is presented in order to overcome the disadvantages of off-line chromatopile analysis for the transformer.Here we(expound) the principle of pattern identification,build the faults diagnosis model and give the training precision.Comparing the diagnosis result of BP net with the one of traditional three-ratio method,the accuracy and effectiveness of the diagnosis method is proved.