Fault positioning method for hybrid line of power distribution network

The invention discloses a power distribution network hybrid line fault positioning method, which comprises the following steps of: determining a corresponding interval according to the position of each traveling wave detection point on a line, and acquiring traveling wave propagation time of traveling waves transmitted in each interval; according to the traveling wave propagation time, calculating theoretical time differences of demarcation points of all the intervals transmitted to the two ends of the line, and constructing a time axis by all the theoretical time differences; acquiring an actual time difference value of a fault traveling wave generated by a fault point reaching two ends of the line; and according to the coincidence position of the actual time difference on the time axis, judging the interior or demarcation point of the interval where the fault point is located. When the power line has a fault actually, the internal or demarcation point of the interval where the fault point is located can be