潮湿环境下某750 kV架空线路复合绝缘子异常发热分析  

Abnormal Heating of Composite Insulator in 750 kV Overhead Line Under Humid Environment

作　　者：漆思怡 刘威 赵洪峰[3] 张永康 张小军 QI Siyi;LIU Wei;ZHAO Hongfeng;ZHANG Yongkang;ZHANG Xiaojun(State Grid Xinjiang Electric Power Research Institute,Urumqi 830011,China;Xinjiang Key Laboratory of Extreme Environment Operation and Detection Technology on Power Transmission&Transformation Equipment,Urumqi 830011,China;Xinjiang University,School of Electrical Engineering,Urumqi 830046,China)

机构地区：[1]国网新疆电力有限公司电力科学研究院,乌鲁木齐830013 [2]新疆输变电设备极端环境运行与检测技术重点实验室,乌鲁木齐830013 [3]新疆大学电气工程学院,乌鲁木齐830000

出　　处：《电瓷避雷器》2024年第6期44-52,共9页Insulators and Surge Arresters

摘　　要：复合绝缘子较其余绝缘子而言在电气性能方面表现十分优越,且更具经济性,因此现今高压输电线路中采用复合绝缘子占比较高。复合绝缘子虽在大量输电线路中应用时表现优异,但由于复合绝缘子中构成有机复合材料的大分子易断裂,存在易受极端环境影响形成表面污秽,从而降低绝缘子性能的情况。文中对赛某一线某杆塔的异常发热绝缘子进行研究,发现高压端的污秽程度较为严重。进一步研究得出该绝缘子高压端表面污秽严重是由于受到周围高场强强度以及所处片区极端环境湿度骤高双重因素的影响,而高压端周围的场强强度与均压环的安装位置联系紧密。本研究通过COMSOL对该绝缘子进行建模并仿真分析,最后得出该绝缘子在运时高压端的均压环安装位置确实会导致周围场强强度较高,并进一步仿真得出了均压环安装位置的最佳范围,为探索绝缘子异常发热成因以及其解决方案提供了思路。Composite insulators are superior in terms of electrical performance and are more economical compared to other insulators,so they are widely used in high-voltage transmission lines.Although composite insulators have excellent performance when applied in a large number of power transmission lines,because the macromolecules constituting organic composite materials in composite insulators are easy to break,the surface pollution is easily affected by extreme environment,thus reducing the performance of insulators.The abnormal heating insulators in a certain pole and tower are studied,and it is found that the pollution degree of the high voltage end is more serious.Further study shows that the surface pollution of the high voltage end of the insulator is seriously affected by the dual factors of high field strength and extreme environment and high humidity in the area,and the field strength around the high voltage end is closely related to the installation position of the grading ring.The insulator was modeled and simulated by COMSOL.Finally,it was concluded that the installation position of the grading ring at the high voltage end of the insulator during operation would indeed lead to higher field strength around it.The optimal range of the installation position of the grading ring was further simulated,which provided ideas for exploring the causes of abnormal heating of the insulator and its solutions.

关 键 词：绝缘子 均压环 SEM COMSOL 

分 类 号：TM216[一般工业技术—材料科学与工程] TM75[电气工程—电工理论与新技术]