Transformer´s UHF partial discharge signal detection based on converted Duffing oscillator model

It is significantly difficult to make well detection of transformer operating conditions in the environment with strong noise and electromagnetic interference. This paper presents Duffing oscillator model transformation based on the generalized time scale and the weak partial discharge signal can be detected by the use of ultra high frequency (UHF) partial discharge detection on the model, thus the operation of transformers is acquired. The theoretical analysis and simulation results show: this new method not only with chaos and noise immunity of the good, but also can detect faint pulse signals of transformers partial discharge in the environment with low SNR and strong electromagnetic interference, thus it can improve the sensitivity and anti-jamming ability to detect power transformer operation of the system.