Power line fault point positioning method based on instantaneous phase consistency

The invention provides a power line fault point positioning method based on instantaneous phase consistency. The method comprises the following steps: determining a search step length, and generating a plurality of to-be-determined fault points in a fault circuit; based on the transient voltage and current instantaneous phase consistency on the short-circuit transition resistor, for different line fault types, respectively establishing constraint relationships of the voltage and current instantaneous phase consistency on the transition resistor; and calculating the voltage and current instantaneous phase consistency on the transition resistance of each to-be-determined fault point one by one, wherein the to-be-determined fault point with the highest consistency is the determined fault point. According to the positioning method, the power line fault points can be positioned layer by layer, the positioning method is effective and reliable, and the simple short-circuit fault of the power electronic power grid ca