Title :
Principal decomposition by-products generated at various abnormalities in gas-insulated transformers
Author :
Nukaiyama, Y. ; Takagi, I. ; Ishihara, H. ; Kudo, A. ; Maki, Y. ; Hosokawa, N.
Author_Institution :
Chubu Electric Power Co. Inc., Nagoya, Japan
fDate :
10/1/1994 12:00:00 AM
Abstract :
Gas analysis provides a promising means for a diagnosis of gas-insulated equipment. Although many studies have been concentrated on SF6 gas decomposition, they were mostly related to the faults in GIS systems and not directly applicable to gas-insulated transformers, which have much more complicated material structure. An experimental survey on decomposition by-products at various abnormal conditions was carried out by use of simulation models to develop a diagnostic method for gas-insulated transformers based on gas and ion chromatograph analyses. Major components characteristic in each abnormality, such as SO2 on metal overheat, SO2F 2 on partial discharges, etc. were identified by the experiments
Keywords :
SF6 insulation; chromatography; decomposition; gas insulated transformers; insulation testing; power transformer insulation; power transformer testing; SF6; SO2; SO2F2; decomposition by-products; diagnostic method; gas analysis; gas chromatograph analyses; gas-insulated transformers; ion chromatograph analyses; metal overheat; partial discharges; simulation models; Analytical models; Geographic Information Systems; Partial discharges; Power system reliability; Power transformer insulation; Predictive maintenance; Pressing; Substations; Sulfur hexafluoride; Urban areas;
Journal_Title :
Power Delivery, IEEE Transactions on
