Fault‐locating method using harmonic components of the arc‐voltage waveform

AbstractThis paper describes a new type of the fault‐locating method by using voltage and current values measured in a substation or transmission lines. This method is based on the impedance method and consists of the following items: (1) analysis of harmonic components in voltage waveforms measured in the substation; (2) estimation of the arc fault voltage on the lines; (3) calculation of the line impedance voltage drop; and (4) determination of the fault‐locating distance.The availability of this method was confirmed by arc fault tests on 6‐kV cable and overhead distribution lines. As a result, the fault‐locating error of this method was proved to be roughly less than 10 percent.