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Application of Joint Electro-Chemical Detection for Gas Insulated Switchgear Fault Diagnosis
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 Title & Authors
Application of Joint Electro-Chemical Detection for Gas Insulated Switchgear Fault Diagnosis
Li, Liping; Tang, Ju; Liu, Yilu;
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 Abstract
The integrity of the gas insulated switchgear (GIS) is vital to the safety of an entire power grid. However, there are some limitations on the techniques of detecting and diagnosing partial discharge (PD) induced by insulation defects in GIS. This paper proposes a joint electro-chemical detection method to resolve the problems of incomplete PD data source and also investigates a new unique fault diagnosis method to enhance the reliability of data processing. By employing ultra-high frequency method for online monitoring and the chemical method for detecting SF6 decomposition offline, the acquired data can form a more complete interpretation of PD signals. By utilizing DS evidence theory, the diagnostic results with tests on the four typical defects show the validity of the new fault diagnosis system. With higher accuracy and lower computation cost, the present research provides a promising way to make a more accurate decision in practical application.
 Keywords
Gas insulated switchgear;Partial discharge;Fault diagnostic;DS evidence theory;Joint electro-chemical method;
 Language
English
 Cited by
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