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绝缘子表面干燥带的热电耦合研究与COMSOL仿真

发表时间:2018-01-31  浏览量:648  下载量:57
全部作者: 王磊,牛铭康,孙倩,黄猛,吕玉珍,李成榕
作者单位: 华北电力大学新能源电力系统国家重点实验室;华北电力大学高电压及电磁兼容北京市重点实验室;华北电力大学能源动力与机械工程学院
摘 要: 悬式绝缘子表面干燥带的产生会极大地改变绝缘子表面热电场分布,造成局部场强、分担的电势、温升过高,影响绝缘子的正常稳定运行。本文对干燥带形成后绝缘子多物理状态的影响因素进行研究。运用COMSOL软件着重研究不同污秽度干燥带对悬式绝缘子表面热电场分布的影响,重点阐述绝缘子表面干燥带产生数目和部位对表面最大场强的改变。仿真结果表明,钢脚部位的电势高,铁帽部位的电势低,并且干燥带污秽度对电势的影响具有明显的分界点;钢脚、铁帽部位的温度高,其余部位的温度低,热量向铁帽、干燥带附近汇集;干燥带产生位置靠近钢脚部位的电场强度大,靠近铁帽部位的电场强度小;与减少干燥带数目相比,提高干燥带的分布均匀性对避免污闪事故更为重要。三维分析结果对防治污闪有实际指导意义。
关 键 词: 电气工程;干燥带;热电耦合;表面最大场强
Title: Research on the thermoelectric coupling of insulator surface dry band and COMSOL simulation
Author: WANG Lei, NIU Mingkang, SUN Qian, HUANG Meng, LÜ Yuzhen, LI Chengrong
Organization: State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University; Beijing Key Laboratory of High Voltage & EMC, North China Electric Power University; School of Energy, Power and Mechanical Engineering, North China Electric Power University
Abstract: Suspension insulator surface dry band will greatly change the surface thermoelectric field distribution, resulting in strong local field, the sharing of potential, too high temperature rising, so it will affect the stability of the normal operation of the insulator. In this paper, the influence factors of polyphysical states of the insulator after dry band formation is studied. COMSOL software was used to study the effect of different pollution levels on the surface thermoelectric field distribution of suspension insulators, and the change of the number and location of insulator surface dry band to maximum field strength were discussed. Simulation results show that the steel foot has high potential, while the electric potential of the gooses is low, moreover the pollution levels influence of dry band on the potential has a cut-off point. The temperatures of the steel foot and goosan are high, while the temperatures of the remaining parts are low, and the heat is collected to the goosan and the dry band. The strength of the electric field near the steel foot is high, and the intensity of the electric field near the goosan is small. Compared with reducing the number of dry band, improving the distribution uniformity of dry band is more important to avoid the pollution flashover accident. The results of three-dimension analysis are of practical significance to prevent pollution flashover.
Key words: electrical engineering; dry band; thermoelectric coupling; maximum field strength
发表期数: 2018年1月第2期
引用格式: 王磊,牛铭康,孙倩,等. 绝缘子表面干燥带的热电耦合研究与COMSOL仿真[J]. 中国科技论文在线精品论文,2018,11(2):145-152.
 
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