A novel fault location scheme using voltage traveling-wave of CVTs

In this paper, high-speed acquisition voltage data according to two phase-to-ground faults between Ge-Gang transmission line is processed using wavelet transformation, by which the exact inceptive traveling-waves can be obtained as well as the GPS time stamps and the fault distances by means of those GPS time stamps of two ends. The maximum error of fault location is less than 300 m. Also, an equivalent circuit considering stray capacitance between primary and secondary windings is presented in this paper along with the frequency and transient responses of CVT, and we proposed that the CVT voltage can be used in traveling-wave fault location and further studies relative to high frequency characteristics of CVT should be further carried out.