Dynamic BIM Identification Method for Secondary Circuit Defects in Substation Relay Protection
After the renewal,improvement and upgrading of relay protection devices,there is still a large defect rate in the sec-ondary circuit,which increases the risk of substation operation.Therefore,the dynamic BIM identification method of substa-tion relay protection secondary circuit defects is proposed.This paper deeply analyzes the secondary circuit structure and defect category,apply BIM technology to build the substation data/information model,collect the secondary circuit defect informa-tion,eliminate the noise in the secondary circuit defect signal through wavelet packet analysis algorithm,extract the secondary circuit defect characteristic signal vector based on wavelet packet energy spectrum,train the LSSVM classifier with the defect characteristic signal vector as the input vector,and determine the best parameters of the classifier.The secondary circuit signal of relay protection to be identified is input into the trained LSSVM classifier to realize the classification and identification of sec-ondary circuit defect dynamic BIM.The experimental data show that under different experimental conditions,the minimum time delay of the proposed method is 15.20 ms and the minimum error of defect identification is 0.23％,which fully proves the better application performance of the proposed method.
万方数据
维普
