Fault line selection of distribution networks based on feature matching of power disturbance data

With the access of distributed power sources and the extensive use of power electronic equipment, faults in distribution networks are becoming more frequent. By researching the current signal when the fault occurs in the distribution network, it can be found that there are great differences between the waveform characteristics of the fault line and the normal line. On this basis, a new method for fault line selection of distribution network based on the feature matching of power disturbance data is proposed, which realizes the fault line selection of distribution network by means of feature extraction, feature database construction and topic search with the power disturbance data provided by power quality monitor. Among them, it is necessary to select the power quality monitor which is easy to be deployed as the data source, so as to solve the problems of insufficient measurement configuration and information island in distribution network and improve the observable ability of power grid. According to the simulation verification of the IEEE 13 node and IEEE 37 node system, the proposed method is not only simple and practical, but also can accurately accurate position the fault without being affected by the factors, such as initial fault angle, fault location, and power grid structure.