Failure location system, failure location system, failure location method, and failure location program

摘要

PROBLEM TO BE SOLVED: To provide a fault point locating system capable of simply and accurately locating a fault point by more correctly estimating a rising point of a surge waveform even if a noise level varies or a rise of the surge waveform is gentle.SOLUTION: A noise level maximum value detecting part obtains the noise level maximum value Vn of a noise level maximum value detecting section Tn of differential absolute value data. Then, a surge waveform peak point detecting part detects a peak point P1 which is the first maximum point of a surge waveform peak point detecting section Tp. Then, a surge waveform arrival time computing part detects a point P2 which first becomes lower than Vn in a reverse direction (direction going back in time) from a point Pwhich is the starting point of the surge waveform peak point detecting section Tp to a 400-th point. The surge waveform arrival time computing part makes a zero cross point P0 of lines connecting the peak points P1 and P2 as the rising point of the surge waveform.