Partial discharge recognition method and system

The invention provides a partial discharge recognition method and a partial discharge recognition system. The method comprises the steps of collecting audio signal of high-pressure equipment, analyzing the time domain and frequency domain of the audio signal to extract the feature of the signal, employing the method of principal component analysis to reduce the dimension of the signal feature, and classifying and identifying the dimension-reduced signal feature to determine whether the partial discharge is generated. The method and the system provided by the invention employ the method of principal component analysis to preprocess data and reduce the dimension of sample space, thus ensuring the recognition rate and also greatly improving computational speed.