Introduction of a computer sound card to use high-voltage insulator leakage current cost-effective acquisition of new technology, and through small series analysis of the obtained signals de - noise. Compared with the traditional signal analysis method, small analysis technology not only from the noise accurately distill the leakage current signal, while at the same authentic reproduction of the leakage current signal degradation characteristics, it is important for early fault diagnosis device. significantly improves measurement accuracy, enhanced equipment the accuracy of fault diagnosis.

    High-voltage transmission line insulator string flashover contamination is one of the important factors affecting the power grid, with the development of power systems and various types of pollution intensified, worsening pollution flashover accident, which seriously hamper the power system security and stability, economy. And insulator pollution level is closely related to its leakage current size, it has practical significance for engineering high voltage insulator leakage current detection.