Title :
Research on Ultrasonic Locating of Partial Discharge in Power Transformer Based on Modified Multiple Signal Classification
Author :
Qing Xie ; Nan Wang ; Xin Xiang ; Yanqing Li ; Fangcheng Lu
Author_Institution :
Dept. of Electr. Eng., North China Electr. Power Univ. Baoding, Baoding
Abstract :
The precise PD locating in power transformer can provide scientific information and guidance for its state maintenance. Due to the low resolution and estimation precision of MUSIC algorithm in PD locating used ultrasonic phased array, in this paper, a new locating method is proposed based on modified multiple signal classification (MMUSIC). Firstly, MMUSIC algorithm is used for direction of arrival estimating of PD source. Secondly, space locating of PD source is realized by crossover locating principle. Finally, the result of simulation based on 8 times 8 plane phased array model verifies the correctness of the new method, with the error less than 6 centimeters.
Keywords :
acoustic signal processing; array signal processing; direction-of-arrival estimation; fault location; insulation testing; partial discharge measurement; power transformer insulation; power transformer testing; signal classification; ultrasonic measurement; MMUSIC algorithm; crossover locating principle; direction-of-arrival estimation; modified multiple signal classification; partial discharge; phased array model; power transformer; state maintenance; ultrasonic location; ultrasonic phased array; Accidents; Direction of arrival estimation; Error correction; Interference; Multiple signal classification; Partial discharges; Phase estimation; Phased arrays; Power transformers; Signal resolution;
Conference_Titel :
Power and Energy Engineering Conference, 2009. APPEEC 2009. Asia-Pacific
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-2486-3
Electronic_ISBN :
978-1-4244-2487-0
DOI :
10.1109/APPEEC.2009.4918721
