Energy relative entropy fault section location based on matching pursuit method

摘要

In order to improve the reliability of power supply and the accuracy of section location method, based on the characteristics of upstream and downstream transient zero mode currents at fault point, this paper proposes the fault section location method based on energy relative entropy of matching pursuit method. The characteristics of transient zero mode current are: the transient zero mode current of the adjacent detection point on the same side of the fault point has a high similarity; the transient zero mode current similarity of adjacent detection points on both sides of the fault point is low, and the initial polarity is opposite. The distribution automation terminal upload the fault data to the master station, and the master station adaptively decompose the fault signal by matching pursuit method, and calculate the relative entropy value between the adjacent detection points. By constructing a section location vector, the section corresponding to the largest element in the section location vector is the fault section. Several simulations are carried out under different fault conditions, which show the correctness and effectiveness of the method.