Title :
Application of the wavelet transform to backup protection of MV networks-wavelet phase comparison method
Author :
Michalik, M. ; Okraszewski, T.M.
Author_Institution :
Wroclaw Univ. of Technol., Poland
Abstract :
Application of the wavelet transform (WT) to design of a single phase-to-ground protection that could be applied as a backup to standard medium voltage relays in (MV) overhead transmission lines is presented. The concept is based on the phase comparison between wavelet decomposition coefficients of zero sequence voltage and current signals. The idea was tested for signals generated in ATP/EMTP model of MV network. The results obtained are presented and the advantages as well as the drawbacks of the method are discussed.
Keywords :
EMTP; power overhead lines; power system simulation; power system transients; power transmission protection; relay protection; wavelet transforms; ATP-EMTP simulation model; MV networks; backup protection; overhead transmission lines; single phase-to-ground protection; standard medium voltage relays; transient analysis; wavelet decomposition coefficients; wavelet phase comparison method; wavelet transform; zero sequence current signals; zero sequence voltage; Current measurement; Discrete wavelet transforms; Fault currents; Frequency; Protection; Protective relaying; Transient analysis; Voltage; Wavelet analysis; Wavelet transforms;
Conference_Titel :
Power Tech Conference Proceedings, 2003 IEEE Bologna
Print_ISBN :
0-7803-7967-5
DOI :
10.1109/PTC.2003.1304616
