운전 중인 전력기기의 부분방전 측정장치 개발에 관하여

This paper is described the development of on-line partial discharge detector for high voltage apparatus. This detector consists of acoustic and high frequency current sensors, amplifier part, A/D converter part, data communication part and computer. The contents of paper are characteristics of units and digital signal processing for reducing noise in partial discharge detection. We seek methods to do good digital signal processing for detection of partial discharge. We apply digital filtering methods to the electric signal and a cross correlation to the acoustic signal. This paper shows the characteristics of these filtering method and cross correlation in partial discharge detection.