English This paper introduces a new cost-effective technique for collecting leakage currents from high-voltage insulators through computer sound cards and denoising the obtained signals by wavelet analysis. Compared with the traditional signal analysis method, the wavelet analysis technology can not only accurately extract the leakage current signal from the noise, but also can reproduce the degradation characteristics in the leakage current signal, which is of great significance for early fault diagnosis. Device. It significantly improves the accuracy of the measurement and enhances equipment failure. The accuracy of the diagnosis.
The pollution flashing of the insulator strings of high-voltage transmission lines is one of the important factors affecting the operation of the power grid. With the development of the power system and the intensification of various types of pollution, the pollution flashover accident has become more and more serious, which has seriously hindered the safety and stability of the power system. Economic Operation. Closely related to the degree of contamination of the insulator is the amount of leakage current. Therefore, detecting the leakage current of the high voltage insulator has practical practical significance.
