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In order to make more profound comprehension of propagation characteristics for E-M signals from partial discharge in GIS, the GIS models with isolating switch are creation to analysis the E-M wave propagation characteristics using FDTD method. The influences of the isolating switch and difference receive degree on the propagation characteristics of E-M wave with comparison of isolating switch close...
Gas insulated switchgear (GIS) is the most important equipment in the power grid. Especially, for insulation failure, the monitoring, analysis and pattern recognition technology of partial discharge in GIS is the most important. Thus a 220 kV GIS bus bar cavity was taken as an object to design three PD physical models. The PD signals on different defects were detected with the IEC60270 method. The...
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...
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