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

Volume

9

Issue

4

fYear

1994

fDate

10/1/1994 12:00:00 AM

Firstpage

1885

Lastpage

1891

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;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.329521

Filename

329521