摘要
针对复合绝缘子内部碳化爬电缺陷,建立FXBW-500大-小-小伞型线路复合绝缘子的电磁热耦合计算有限元模型,分析缺陷位置、表面污秽对芯棒内部碳化爬电缺陷引起的温升影响规律。结果表明:当复合绝缘子不同位置存在局部碳化爬电缺陷时,局部温升从大到小依次为高压端、低压端和中端。存在污秽时,碳化爬电缺陷绝缘子的温度分布没有明显变化,但各部位最大温升值均明显增大,其中高压端最大温升值由9.3℃增大至18.2℃,沿面温升由2.52℃增大至4.94℃。虽然污秽的存在使得绝缘子整体温度升高,但并未掩盖缺陷处的温度突变。因此在通过温度识别碳化爬电缺陷位置时,可重点将温升突变情况作为参考依据。
Regarding the internal carbonization creepage defect of composite insulator,a finite element model of electromagnetic and thermal coupling calculation for FXBW-500 large-small-small shed type composite insulator was established,and the influencing laws of defect location and surface pollution on the temperature rise caused by internal carbonization creepage defect in core rod were analyzed.The results show that when there is a local carbonization creepage defect at different positions of composite insulators,the local temperature rise from high to low is high voltage end,low voltage end,and middle end.When there is pollution,the temperature distribution of the carbonization creepage defective insulator does not change significantly,but the maximum temperature rise values of each part all increase significantly,among which the maximum temperature rise of high voltage end increases from 9.3℃to 18.2℃,and the temperature rise along the surface increases from 2.52℃to 4.94℃.Although the existence of pollution makes the overall temperature of the insulator rise,it still does not conceal the temperature jump at the defect location.Therefore,when the location of carbonization creepage defects are identified through temperature,the temperature jump can be taken as a reference.
作者
武永泉
张四维
江宗毅
焦彦俊
高敏程
龙涛
郭子晗
张东东
WU Yongquan;ZHANG Siwei;JIANG Zongyi;JIAO Yanjun;GAO Mincheng;LONG Tao;GUO Zihan;ZHANG Dongdong(Nanjing Power Supply Branch,State Grid Jiangsu Electric Power Co.,Ltd.,Nanjing 210019,China;Nanjing Institute of Technology,Nanjing 211167,China)
出处
《绝缘材料》
北大核心
2025年第2期102-109,共8页
Insulating Materials
基金
国网江苏省电力有限公司科技项目(J2023087)。
关键词
输电线路
复合绝缘子
碳化爬电
有限元
电热场
transmission lines
composite insulators
carbonization creepage
finite element
electric thermal field
