电工技术学报  2019, Vol. 34 Issue (20): 4208-4216    DOI: 10.19595/j.cnki.1000-6753.tces.181186
电机与电器 |
表面异物对252kV气体绝缘组合电器盆式绝缘子绝缘性能的影响
庄丞1, 曾建斌1, 袁传镇2
1. 厦门理工学院电气工程与自动化学院 厦门 361000;
2. 许继(厦门)智能电力设备股份有限公司 厦门 361000
Effect of Surface Foreign Matters on the Insulation Property of 252kV Gas Insulated Switchgear Basin Insulators
Zhuang Cheng1, Zeng Jianbin1, Yuan Chuanzhen2
1. School of Electrical Engineering and Automation Xiamen University of Technology Xiamen 361000 China;
2. Xu Ji (Xiamen) Intelligent Power Equipment Co. Ltd Xiamen 361000 China
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摘要 针对252kV气体绝缘组合电器(GIS)盆式绝缘子表面常见的五类异物(金属屑、毛发、纸屑、硅脂和沙粒)对其局部电场的影响建立模型,并利用三维有限元分析软件对其进行仿真计算。为验证理论计算的有效性,搭建一个盆式绝缘子绝缘试验平台。在此平台上,对异物附着在盆式绝缘子表面不同位置(高、中、低电位区)和不同排列方式(线性、片状)下进行雷电冲击、工频耐压及局部放大试验。试验结果表明:当体积很小的单一金属屑附着在绝缘子凸面高电位区时,未引起击穿现象;当金属屑位于绝缘子凸面低电位区时,片状排列较线性排列更容易引起击穿;四类非金属异物则对绝缘子的绝缘性能影响较小;试验中测得沙粒的局部放电量明显高于其他三类非金属异物,表明沙粒类异物长久积累后诱发绝缘故障的可能性会显著提高。
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庄丞
曾建斌
袁传镇
关键词 表面异物绝缘性能局部电场盆式绝缘子气体绝缘组合电器    
Abstract:This paper establishes a model to evaluate the influence on local electric field caused by five common foreign matters on the surface of 252kV GIS basin insulator, such as metal scraps, hair, paper scraps, silicone grease and sand. Later, a series of simulations have been carried out using three-dimensional finite element analysis software. An insulation test platform was built in order to verify the validity of results of the theoretical analysis. On this test platform, lightning impulse, power frequency withstand voltage and partial discharge tests were carried out under different positions (high, medium and low potential areas) and different arrangements (linear, scattered) of foreign matters adhered to the surface of basin insulator. The experimental results illustrate that when the small size of a single metal scrap adheres to the insulator convex high potential area, it does not cause the breakdown phenomenon. When the metal scraps are in the low potential area of convex of insulator, the linear arrangement of the metal scraps is more likely to cause insulation breakdown. Four types of non-metallic foreign matters have less influence on the insulation property of the insulators. The measured discharge capacity of the sand is significantly higher than other three types of non-metallic foreign matters, which indicates that the possibility of insulation fault will increase significantly after the long-term induced accumulation of sand-type foreign matters.
Key wordsSurface foreign matters    insulation property    local electric field    basin insulators    gas insulated switchgear   
收稿日期: 2018-05-10      出版日期: 2019-10-30
PACS: TM85  
基金资助:福建自然科学基金资助项目(2016J01747)
通讯作者: 曾建斌 男,1975年生,副教授,硕士生导师,研究方向为电器智能化技术。E-mail: Jianbin.zeng@xmut.edu.cn.com   
作者简介: 庄 丞 男,1991年生,硕士研究生,研究方向为高电压技术。E-mail: bzcing4618@163.com
引用本文:   
庄丞, 曾建斌, 袁传镇. 表面异物对252kV气体绝缘组合电器盆式绝缘子绝缘性能的影响[J]. 电工技术学报, 2019, 34(20): 4208-4216. Zhuang Cheng, Zeng Jianbin, Yuan Chuanzhen. Effect of Surface Foreign Matters on the Insulation Property of 252kV Gas Insulated Switchgear Basin Insulators. Transactions of China Electrotechnical Society, 2019, 34(20): 4208-4216.
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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.181186          https://dgjsxb.ces-transaction.com/CN/Y2019/V34/I20/4208