Research on insulation diagnosis technology and key technology of operation reliability of dry SF6 gas insulated DC bushing

Shiling Zhang; Junchen Liu; Xinlin Chen

doi:10.1117/12.2639559

27 June 2022 Research on insulation diagnosis technology and key technology of operation reliability of dry SF6 gas insulated DC bushing

Shiling Zhang, Junchen Liu, Xinlin Chen

Author Affiliations +

Proceedings Volume 12253, International Conference on Automation Control, Algorithm, and Intelligent Bionics (ACAIB 2022); 122530H (2022) https://doi.org/10.1117/12.2639559
Event: Second International Conference on Automation Control, Algorithm, and Intelligent Bionics (ACAIB 2022), 2022, Qingdao, China

Abstract

Taking the side bushing of dry-type SF6 gas insulated converter valve and DC through wall bushing as the research object, the field test technology and fault treatment scheme of two kinds of bushing are studied respectively. First of all, put forward the research basis and field test results of the insulation and equipment, and improve the reliability of the bushing according to the research results of the current insulation, test conditions and on-site commissioning, as well as the on-site test results, and improve the reliability of the bushing. Based on the analysis of different fault forms, fault properties and causes of the bushing on the side of the dry-type SF6 gas insulated converter valve and the DC through wall bushing, and combined with the relationship between the operating characteristics and the insulation state of the bushing. This paper analyzes incompleteness of the current test items on the performance assessment of the bushing in the field handover, pre-test and maintenance stages of the bushing, The field test methods and requirements for the dielectric loss spectrum curve, DC resistance, decomposition composition of SF6 gas, dissolved gas in oil and other items of dry-type SF6 gas insulated converter valve side bushing and DC wall bushing are put forward. According to the background interference law of local discharge in the valve hall of the current project converter station, the net insulation size of the valve hall and the technical level of DC source equipment, the improvement measures of on-site DC withstand voltage test of side bushing and DC wall bushing of dry SF6 gas insulated converter valve are put forward.

Citation Download Citation

Shiling Zhang, Junchen Liu, and Xinlin Chen "Research on insulation diagnosis technology and key technology of operation reliability of dry SF6 gas insulated DC bushing", Proc. SPIE 12253, International Conference on Automation Control, Algorithm, and Intelligent Bionics (ACAIB 2022), 122530H (27 June 2022); https://doi.org/10.1117/12.2639559

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KEYWORDS

Dielectrics

Reliability

Composites

Transformers

Epoxies

Materials processing

Capacitors

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