Title :
Stationary Wavelet Transform Based HVDC Line Protection
Author :
Liu, Xiaolei ; Osman, A.H. ; Malik, O.P.
Author_Institution :
Univ. of Calgary, Calgary
fDate :
Sept. 30 2007-Oct. 2 2007
Abstract :
A novel HVDC line protection algorithm based on traveling wave theory is presented in this paper. Stationary wavelet transform (SWT) is adopted to process the rectifier side DC voltage and then wavelet modulus maxima are used to further represent useful traveling wave signal. The effect of border distortion is considered and a new denoising method is proposed. The proposed protection algorithm can distinguish DC line-to-ground faults from transients caused by AC faults. The algorithm performs well even under high resistance ground faults. A possible relay implementation is also proposed.
Keywords :
HVDC power transmission; power system faults; power system protection; power system transients; rectifiers; wavelet transforms; AC faults; DC line-to-ground faults; HVDC line protection algorithm; border distortion; denoising method; high resistance ground faults; rectifier side DC voltage; relay implementation; stationary wavelet transform; traveling wave signal; traveling wave theory; wavelet modulus maxima; Asia; HVDC transmission; Meetings; Noise reduction; Power systems; Protection; Protective relaying; Signal processing algorithms; Student members; Wavelet transforms; HVDC line protection; relay; stationary wavelet transform; traveling wave;
Conference_Titel :
Power Symposium, 2007. NAPS '07. 39th North American
Conference_Location :
Las Cruces, NM
Print_ISBN :
978-1-4244-1726-1
Electronic_ISBN :
978-1-4244-1726-1
DOI :
10.1109/NAPS.2007.4402283
