Title :
A novel fault location scheme using voltage traveling-wave of CVTs
Author :
Xia, Y.J. ; Yin, X.G. ; Wang, Z.H. ; Yang, J.C. ; Zhang, B.
Author_Institution :
Huazhong Univ. of Sci. & Technol., Wuhan, China
Abstract :
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.
Keywords :
capacitance; equivalent circuits; fault location; frequency response; high-frequency effects; high-voltage engineering; power transmission faults; power transmission lines; power transmission reliability; transient response; wavelet transforms; windings; CVT; GPS time stamps; Ge-Gang transmission line; equivalent circuit; fault distances; fault location; frequency response; high frequency characteristics; high-speed acquisition voltage data; phase-to-ground faults; primary windings; secondary windings; stray capacitance; transient response; voltage traveling wave; wavelet transformation; Circuit faults; Data acquisition; Distributed parameter circuits; Fault location; Frequency synchronization; Global Positioning System; Power system reliability; Power system transients; Power transmission lines; Voltage;
Conference_Titel :
Universities Power Engineering Conference, 2004. UPEC 2004. 39th International
Conference_Location :
Bristol, UK
Print_ISBN :
1-86043-365-0
