Title :
Insulation condition monitoring of epoxy spacers in GIS using a decomposed gas CS2
Author :
Jun Chen ; Wenjun Zhou ; Jianhui Yu ; Qi Su ; Xiaoguang Zheng ; Yongyan Zhou ; Li Li ; Wejian Yao ; Baoshan Wang ; Hui Hu
Author_Institution :
Sch. of Electr. Eng., Wuhan Univ., Wuhan, China
Abstract :
The epoxy spacers in SF6 Gas Insulated Switchgear (GIS) are vulnerable to discharge. Once the surface of the epoxy spacers is deteriorated under discharge, insulation break down may occur subsequently. From a number of experiments carried out on 110 kV GIS, a new gas CS2 was detected when creeping discharges occur on the epoxy spacer surface. In order to verify the correlation between CS2 and the degradation of epoxy spacers, the quantum chemistry analysis was used to investigate the mechanism of CS2 development. Based on the results, the relation between CS2 and spacer insulation degradation was determined.
Keywords :
carbon compounds; chemical variables measurement; chromatography; condition monitoring; decomposition; discharges (electric); epoxy insulation; gas insulated switchgear; quantum chemistry; sulphur compounds; CS2; SF6; creeping discharge; decomposed gas; electric discharge; epoxy spacer degradation; gas insulated switchgear; insulation breakdown; insulation condition monitoring; quantum chemistry analysis; spacer insulation degradation; voltage 110 kV; Condition monitoring; Degradation; Discharges (electric); Partial discharges; Sulfur hexafluoride; CS2; GIS; condition monitoring; degradation; discharge; epoxy spacer;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
DOI :
10.1109/TDEI.2013.6678864
