[1]楊定乾,陳赟,丁楊,等.典型40.5 kV穿櫃套管絕緣擊穿案例仿真和分析[J].高壓電器,2017,53(12):221-228.[doi:10.13296/j.1001-1609.hva.2017.12.036]
 YANG Dingqian,CHEN Yun,DING Yang,et al.Simulation and Analysis for Typical Insulation Breakdown Faults of Bushing Through 40.5 kV Cabinet[J].High Voltage Apparatus,2017,53(12):221-228.[doi:10.13296/j.1001-1609.hva.2017.12.036]
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典型40.5 kV穿櫃套管絕緣擊穿案例仿真和分析()
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《高壓電器》[ISSN:1001-1609/CN:61-11271/TM]

卷:
第53卷
期數:
2017年12期
頁碼:
221-228
欄目:
研究與分析
出版日期:
2017-12-31

文章信息/Info

Title:
Simulation and Analysis for Typical Insulation Breakdown Faults of Bushing Through 40.5 kV Cabinet
作者:
楊定乾1陳赟2丁楊1金銘1羅文華1
1. 國網新疆電力公司電力科學研究院, 烏魯木齊 830011; 2. 國網上海市電力公司, 上海 200122
Author(s):
YANG Dingqian1 CHEN Yun2 DING Yang1 JIN Ming1 LUO Wenhua1
1. State Grid Xinjiang Electric Power Company Electric Power Research Institute, Urumqi 830011, China; 2. State Grid Shanghai Electric Power Company, Shanghai 200122, China
關鍵詞:
穿櫃套管 環氧絕緣 邊緣效應 屏蔽體 劣化 擊穿
Keywords:
bushing through cabinet epoxy insulation fringe effect shield deterioration breakdown
DOI:
10.13296/j.1001-1609.hva.2017.12.036
文獻標志碼:
A
摘要:
穿櫃套管絕緣擊穿引發變壓器出口短路案例屢見不鮮,文中將套管絕緣擊穿分爲空氣絕緣擊穿與環氧絕緣擊穿兩類。爲明確兩種擊穿的誘因,結合某省第3季度穿櫃套管絕緣擊穿案例,針對屏蔽體懸浮及內含氣隙的穿櫃套管展開電場仿真研究。仿真結果表明空氣絕緣擊穿多由內等電位屏蔽懸浮造成,環氧絕緣擊穿多由缺陷氣隙放電或擊穿引起的絕緣劣化變性造成,該結果與案例分析一致。爲研究屏蔽改進在防止氣隙放電方面的作用,借鑒800 kV氣體絕緣組合電器中屏蔽裙邊處理改善邊緣效應的措施,對屏蔽改進後含氣隙的穿櫃套管展開電場仿真研究,仿真結果表明裙邊改進對缺陷氣隙的優化作用不大。根據仿真結果,防止穿櫃套管絕緣擊穿類事故不能單單依靠優化屏蔽體手段。仿真和分析結果爲穿櫃套管結構設計及現場安裝具有一定指導意義。
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.

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備注/Memo

備注/Memo:
收稿日期:2017-06-18;修回日期:2017-08-23.楊定乾(1990—),男,碩士研究生,工程師,主要從事電力設備故障診斷及帶電檢測方面的工作。 陳赟(1990—),女,碩士,工程師,主要從事電網規劃方面的工作。 丁楊(1990—),男,學士,助理工程師,主要從事電網技術監督方面的工作。
更新日期/Last Update: 2017-12-25