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This paper deals with PD current pulse waveforms of environmental friendly gases such as N2, CO2, dry air, and CF4 gas that were measured with the SHF_PDPW (Super High Frequency wideband PD current Pulse Waveform measurement) system. This specially developed system enables us to obtain accurately PD current pulse waveforms up to the SHF band (330GHz). When one discusses the UHF method for the insulation...
A method to detect partial discharge (PD) is considered effective for gas insulated switchgear (GIS) insulation diagnostics. In this paper, for a 154 kV model GIS, the influence of the enclosure diameter on PD propagation characteristics was initially investigated using model GIS by varying the enclosure size. Secondly, an experiment was conducted for metallic particles placed in different locations...
Partial discharge (PD) detection using a UHF (ultra high frequency) band signal is a well known advanced insulation diagnosis method in gas insulated switchgear (GIS), and has been actively studied. Detailed investigation of electromagnetic (EM) wave propagation inside the GIS tank is required for significant improvement of detecting PD signal by UHF method. When practically applying the UHF method...
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