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According to the characteristics of transient zero sequence components as well as the existing information fusion technology has the disadvantage of high sample dimension and computer overhead in fault line selection in small current grounding fault . First of all, by using the empirical mode decomposition (EMD) and the Fast Fu Liye transform (FFT) on the zero sequence signal fault feature extraction. And then through the information gain degree to calculate the weight of the line selection method. The sample data of each method separately using the simplex method (SM) to optimize the parameters of least squares support vector machine (LSSVM) integrated line selection, weight and the line fault value. Through the system simulation, the results show that the proposed method has very high accuracy and sensitivity ,which is applied to the fault line.

Grounding Fault Line Selection by EMD and LSSVM