Application of Signal Denoising Technology Based on Improved Spectral Subtraction in Arc Fault Detection

In the research of fault arc detection technology, proper signal denoising can greatly improve recognition ability algorithm. Therefore, this study proposes a current enhancement algorithm based on improved spectral subtraction from statistical law electrical noise in low-voltage distribution system and principle According to results algorithm, selects an appropriate reference as basis for estimation further assumes that types quantities power loads are relatively fixed is stable certain consumption period same place, so obtain environment, then uses realize real-time reduction signals required by The experimental show method complement each other, processing more targeted, which make selected characteristics different between normal state state, eliminate interference high-frequency clutter sensitivity original premise unchanged reliability.