Drawing method of frequency division fault maps for GIS partial discharge based on ultra-high frequency signals

This paper proposes a drawing method of frequency division fault maps for GIS partial discharge based on Ultra-high Frequency signals. By extracting Ultra-high Frequency partial discharge signals and filtering adaptively, interference signals are filtered out real-timely, and the effective frequency sequence is obtained adaptively. The characteristic quantity of each effective frequency point is calculated, and then dynamic fault map varying with effective frequency points, characteristics trend map for frequency division discharge and quantity trend map for effective frequency points are drawn. Compared with current fault maps for GIS partial discharge, test results show that the discharge law for different frequency points is drawn by contacting effective frequency points with partial discharge law proposed in this paper, which is helpful for research on discharge law with the frequency.