Title :
Hybrid traveling wave/boundary protection for bipolar HCDC line
Author :
Liu, Xiaolei ; Osman, A.H. ; Malik, O.P.
Author_Institution :
Univ. of Calgary, Calgary, AB, Canada
Abstract :
A new hybrid protection scheme, based on traveling wave protection principle and boundary protection principle for a bi-polar HVDC line is proposed. Stationary wavelet transform (SWT) is adopted in the traveling wave protection to process DC signals and then wavelet modulus maxima are used to further represent useful traveling wave signal. Boundary protection based on SWT is used jointly with traveling wave protection to distinguish internal faults from external faults. The effect of border distortion, noise, high ground fault resistance, close-up faults and transients caused by lightning strokes are considered in the paper. The proposed scheme can effectively detect faults, determine the faulty pole and calculate fault location at the same time.
Keywords :
HVDC power convertors; HVDC power transmission; fault location; power transmission protection; DC signals; bipolar HCDC line; border distortion; boundary protection principle; close-up faults; external faults; fault location; faulty pole; ground fault resistance; hybrid protection scheme; internal faults; lightning strokes; stationary wavelet transform; traveling wave protection principle; wavelet modulus maxima; Fault detection; HVDC transmission; Impedance; Lightning; Power system transients; Protection; Protective relaying; Signal processing; Voltage; Wavelet transforms; Boundary protection; HVDC line protection; lightning strokes; relay; stationary wavelet transform; traveling waves;
Conference_Titel :
Power & Energy Society General Meeting, 2009. PES '09. IEEE
Conference_Location :
Calgary, AB
Print_ISBN :
978-1-4244-4241-6
DOI :
10.1109/PES.2009.5276029
