Title :
Dielectric characteristics of SF6 gap and insulating spacer stressed by steep-fronted oscillating impulse voltages
Author :
Chen, Qingguo ; Zhang, Qiaogen ; Qiu, Yuchang ; Wei, Xinlao ; Ma, Chun
Author_Institution :
Xi´´an Jiaotong Univ., China
Abstract :
Very fast transient overvoltages (VFTO) generated during disconnecters operation in GIS might cause insulation failure inside or outside GIS. Hence, the breakdown characteristics of GIS stressed by VFTO were studied, and the photoelectric measurements were carried out to investigate the discharge behavior stressed by VFTO or LI. The results show that the space charge accumulation produced by corona discharge of the metallic particle on the spacer is the main reason that causes the insulation failure of GIS
Keywords :
SF6 insulation; corona; electric breakdown; flashover; gas insulated switchgear; overvoltage; space charge; GIS; SF6; SF6 needle-plane gas gap; corona discharge; dielectric characteristics; disconnecter; electric breakdown; flashover; insulating spacer; insulation failure; lightning impulse voltage; metallic particulate contamination; photoelectric measurement; space charge; steep-fronted oscillating impulse voltage; very fast transient overvoltage; Charge measurement; Current measurement; Dielectric measurements; Dielectrics and electrical insulation; Electric breakdown; Geographic Information Systems; Particle measurements; Space charge; Stress measurement; Surges;
Conference_Titel :
Properties and Applications of Dielectric Materials, 2000. Proceedings of the 6th International Conference on
Conference_Location :
Xi´an
Print_ISBN :
0-7803-5459-1
DOI :
10.1109/ICPADM.2000.875697
