Comparison of The Attenuation Measurement Methods for Electromagnetic Partial Discharge Signal in 25.8 kV Gas Insulated Switchgear

We report the characteristics and differences of two types of attenuation measurement methods for electromagnetic partial discharge signal in GIS. The pulse method is to measure the attenuated waveforms in time domain and coverts them into frequency domain to get the attenuation spectra of given GIS section. This method simulates the real partial discharge signal. The frequency swept continuous wave method can obtain attenuation spectra directly so that it gives attenuation with low noise floor and simplicity. We show that both methods are effective and exchangeable because the attenuation results measured by two methods have similar trends

25.8 kV GIS에서 전자기파 부분방전신호 감쇠특성 측정방법 비교