De-noising of GIS UHF Partial Discharge Monitoring based on Wavelet Method

Partial Discharge (PD) happened in GIS may induce the failure of the apparatus and endanger the safety of the grid. Detection of PD with UHF sensor can find the defect earlier. In this a paper, a de-noising method based on the wavelet method is introduced to improve the accuracy of PD detection. The general wavelet de-nosing procedures are described in the paper, after that, the proposed algorithm is demonstrated by a field test.