高压电器2017，Vol.53Issue(12)：221-228,235,9.DOI:10.13296/j.1001-1609.hva.2017.12.036
典型40.5kV穿柜套管绝缘击穿案例仿真和分析
Simulation and Analysis for Typical Insulation Breakdown Faults of Bushing Through 40.5 kV Cabinet
杨定乾 1陈赟 2丁杨 1金铭 1罗文华1
作者信息
- 1. 国网新疆电力公司电力科学研究院,乌鲁木齐830011
- 2. 国网上海市电力公司,上海200122
- 折叠
摘要
Abstract
Transformer outlet short circuit caused by insulation breakdown of bushing through cabinet happens frequently.In this paper,insulation breakdown of the bushing cabinet is classified as air insulation breakdown and epoxy insulation breakdown.To clarify the causes of two kinds of breakdown,the insulation breakdown faults of bushing through cabinet happened in a certain province in the third quarter are analyzed,and the bushings with suspended shield or air gap are simulated on electric field.According to the results,the air insulation breakdown was caused in most cases by internal equipotential suspended shield,and the epoxy insulation breakdown generally resulted from the insulation deterioration due to air-gap discharge or breakdown.The results are in line with the case analysis.In order to study the effect of shielding improvement on air gap discharge,considering the shield-skirt treatment measures to improve the fringe effect of 800 kV gas insulated switchgear,the shield of the bushing with air gap is improved,and the electric field of the bushing is simulated.It is shown that shield-skirt improvement exerts little effect on suppressing air-gap discharge.Thereby,conclusion is drawn that only shield optimization is not available to prevent insulation breakdown of the bushing through cabinet.The obtained simulation and analysis results may provide a reference for design and installation of the bushing through cabinet.Simulation and analysis results for the cabinet bushing has certain guiding significance to the design and installation.关键词
穿柜套管/环氧绝缘/边缘效应/屏蔽体/劣化/击穿Key words
bushing through cabinet/epoxy insulation/fringe effect/shield/deterioration/breakdown引用本文复制引用
杨定乾,陈赟,丁杨,金铭,罗文华..典型40.5kV穿柜套管绝缘击穿案例仿真和分析[J].高压电器,2017,53(12):221-228,235,9.
