SF 6 decomposition and insulation condition monitoring of GIE: A review

High voltage

article

Fuping Zeng¹  Haotian Li¹  Hongtu Cheng¹  Ju Tang¹  Yilu Liu² 

[1] School of Electrical Engineering and Automation, Wuhan University;Department of Electrical Engineering and Computer Science, University of Tennessee;Oak Ridge National Laboratory

关键词: condition monitoring;    electromagnetic interference;    failure analysis;    fault diagnosis;    gas insulated switchgear;    reliability;   

DOI  :  10.1049/hve2.12160

学科分类：物理（综合）

来源: Wiley

【 摘 要 】

The statistics of the Conference International des Grands Reseaux Electriques (CIGRE) indicate that the operational reliability of SF 6 gas-insulated equipment (GIE) is very high; however, the failure rate of the GIE in operation is much higher than that of the IEC standard, and the fault occurs frequently in the GIE at a high voltage level. The reason is due to the complex and strong on-site electromagnetic interference environment and fully enclosed structure of GIE. The key method and technology for effective on-line monitoring and fault diagnosis of GIE are still lacking. Given the partial strong electromagnetic energy and high temperature induced by early latent insulation faults in the equipment, SF 6 gas insulation presents different degrees of decomposition. The decomposition products mainly include SO 2 F 2 , SOF 2 , SO 2 , HF, and H 2 S. The decomposition characteristics of SF 6 are closely related to the property of insulation faults. At present, this area is attracting attention from the power industry and research institutes. This study summarises the current research on SF 6 decomposition component analysis (DCA). The content mainly includes the latest progress of SF 6 decomposition characteristics and mechanism under fault conditions, and fault diagnosis methods based on decomposition components.

【 授权许可】

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