Title :
Impulse partial discharge and breakdown characteristics of rod-plane gaps in N2/SF6 gas mixtures
Author :
Saitoh, H. ; Morita, K. ; Kikkawa, T. ; Kato, K. ; Hayakawa, N. ; Okubo, H.
Author_Institution :
Meidensha Corp., Numazu, Japan
Abstract :
Impulse partial discharge (PD) and breakdown (BD) characteristics of rod-plane gaps in N2/SF6 gas mixtures were investigated for different gap geometry, gas pressure and SF6 gas content. Experimental results revealed that the 50% probability breakdown voltage increased with the gas pressure, which agreed with the theoretical values with consideration of discharge time-lag for impulse voltage application. Furthermore, the impulse PD light emission image was observed together with PD current pulse and light intensity waveforms. The long discharge with stepwise propagation and the double-peak PD pulses could be successfully observed, which corresponded to the streamer/leader transition leading to breakdown
Keywords :
SF6 insulation; electric breakdown; gas insulated switchgear; gas mixtures; nitrogen; partial discharges; 50% probability breakdown voltage; N2-SF6; N2/SF6 gas mixtures; PD current pulse; SF6; SF6 gas content effect; breakdown; discharge time-lag; double-peak PD pulses; gap geometry effect; gas pressure effect; impulse PD light emission image; impulse partial discharge; light intensity waveforms; rod-plane gaps; stepwise propagation; streamer/leader transition; Breakdown voltage; Electric breakdown; Electrodes; Gas insulation; Geometry; Nonuniform electric fields; Partial discharges; Sulfur hexafluoride; Switches; Switchgear;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2001 Annual Report. Conference on
Conference_Location :
Kitchener, Ont.
Print_ISBN :
0-7803-7053-8
DOI :
10.1109/CEIDP.2001.963566
