APPLICATION OF COMPLEX WAVELET TRANSFORM TO SUPPRESS WHITE-NOISE INTERFERENCE IN GIS PD SIGNALS
Ju Tang, XU Zhong-rong, Caixin Sun, Yanbin Xie, Qian Zhou · Proceedings of the CSEE · 2005
As white-noise interference exists in GIS partial discharge (PD) UHF detection inevitably, the available suppression methods are unsatisfactory. According to the feature of white-noise, Daubechie’s complex wavelet is constructed. Through the simple information (SI) and combined information (CI) of complex wavelet transform(CWT), the denoise of simulation signals and field signals is studied. The results manifest that white-noise in GIS PD UHF signal can be suppressed effectively by the SI and CI of CWT.