Abstract：In order to ensure the stability of coal mine high voltage cable and the safe and efficient production of underground power supply, an online insulation monitoring discharge denoising method is presented for high voltage coal mine. On the basis of the partial discharge signals of high voltage cable online insulation monitoring system, a partial discharge denoising method is designed based on wavelet and adaptive blind source separation method, and the principle and structure of the algorithm is studied in detail. The algorithm effectively improves the accuracy of online insulation monitoring of high voltage cables, and the purpose of realtime monitoring of high voltage cable insulation is achieved. The computer simulations and the field experiments show from different perspectives that the integrated comprehensive denoising is effective and accurate.

Keyword：high-voltage cables in coal mine;insulation detection;partial discharge;comprehensive separation denoising;