Ultrasonic Partial Discharge Detection Using Negentropy-based Matched filter
It is essential to detect and localize partial discharge in a nondestructive test,which ensures reliable,long-term operation of critical power apparatus under high voltage stress. In this paper,the ultrasonic detection method combined with electrical PD detection method is used to detect the typical internal PD in transformer. The ultrasonic signals are polluted by various noises when power apparatus operate. The matched filter based on negentropy is presented to detect the ultrasonic PD signal hidden in noises. The simulation and experimental tests demonstrate that the matched filter proposed in the paper suppress the interference signals effectively,and extract the clearly ultrasonic PD signal to enhance the reliability of identification. By producing three-dimensional distributions,it is proved the validity of the ultrasonic detection method.
Partial discharge Ultrasonic detection Transformer Matched filter Negentropy
Ren Lijia Ren Pei Lei Gu Chunyuan
Urban power supply company,Shanghai Municipal Electric Power Company,Shanghai 200080,China
国际会议
南京
英文
1604-1607
2010-09-13（万方平台首次上网日期，不代表论文的发表时间）