Lightning stroke overvoltage identification method based on overvoltage waveform characteristics

The invention discloses a lightning stroke overvoltage identification method based on overvoltage waveform characteristics, and relates to the technical field of electric power. Correlation analysis of transient overvoltage waveforms of different lightning stroke overvoltage and general short-circuit fault overvoltage is carried out, inductive lightning stroke interference signals are distinguished from direct lightning stroke line fault signals according to the minimum similarity coefficient and the average similarity coefficient among the four lightning stroke overvoltage waveforms, and due to the fact that an inductive lightning stroke overvoltage wave head is generally positive, and a direct lightning stroke overvoltage wave head is generally negative, the difference between the polarities of the wave heads of the inductive thunder and the direct lightning is used as an auxiliary criterion, the reliability of the identification criterion is improved, inductive lightning stroke faults and direct lightning