RTV涂层对220kV绝缘子表面电场分布的影响研究
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摘要
为了预防电力系统污闪事故,重污秽地区的输电线路绝缘子表面通常喷涂室温硫化硅橡胶防污闪涂料,以提高输变电设备的外绝缘性能。带电运行的玻璃或瓷绝缘子串表面电场成"U型"分布,两端电场强度高、中间区域低。为了解RTV涂料对绝缘子表面电场分布的影响,本文利用电磁场仿真工具对未涂覆RTV涂层的绝缘子串、新涂覆RTV涂层的绝缘子串以及使用一段时间出现老化状况的绝缘子串进行仿真计算;并在实验室条件下实测了沿串电压分布,对仿真结果加以验证。仿真与试验结果表明,RTV涂料对绝缘子串的片电压分布影响很小。相同条件下RTV涂层的老化状态并不影响其沿串电压分布情况。绝缘子表面电场分布受绝缘子表面状态的影响不大,主要还是受绝缘子自身电容分布的影响。
In order to prevent the pollution flashover, the insulators in the heavily polluted area are usually coated with room temperature vulcanized silicone rubber(RTV) to improve the external insulation performance of power transmission equipment. The electric ?eld distribution of the charged glass/porcelain insulator string is U-shaped. The electric ?eld strength is high at both ends but is low the middle region. For the purpose of understanding the effect of RTV coating on the electric ?eld distribution of insulators, the?nite element calculation software is used to study the electric ?eld distribution of insulator string with no RTV coating, newly coated RTV and aged RTV. The voltage distribution of the insulator string is also measured under laboratory conditions. The results show that RTV coating has little effect on the voltage distribution of insulator strings and the electric ?eld distribution of the insulator string is mainly by its capacitance distribution.
In order to prevent the pollution flashover, the insulators in the heavily polluted area are usually coated with room temperature vulcanized silicone rubber(RTV) to improve the external insulation performance of power transmission equipment. The electric ?eld distribution of the charged glass/porcelain insulator string is U-shaped. The electric ?eld strength is high at both ends but is low the middle region. For the purpose of understanding the effect of RTV coating on the electric ?eld distribution of insulators, the?nite element calculation software is used to study the electric ?eld distribution of insulator string with no RTV coating, newly coated RTV and aged RTV. The voltage distribution of the insulator string is also measured under laboratory conditions. The results show that RTV coating has little effect on the voltage distribution of insulator strings and the electric ?eld distribution of the insulator string is mainly by its capacitance distribution.
引文
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[18]高海峰,贾志东,关志成.运行多年RTV涂料绝缘子表面涂层老化分析研究[J].中国电机工程学报,2005,25(9):158-163.
[19]黄峻峰,齐卫东,张鹏.RTV涂料长期运行后性能分析及复涂方法的研究[J].陕西电力,2007,35(04):43-46.
[20]祝贺,姜宰东.±800kV换流变压器阀侧电容式直流套管电场分析[J].广东电力,2016,29(10):97-101+108.
[21]李如锋,朱赋,胡万波,崔琦.伞裙脆化位置对复合绝缘子电场强度分布的影响[J].广东电力,2015,28(01):96-99.
[22]刘均裕,冯宝,王干军,邓威.PRTV涂料对玻璃绝缘子串电压分布特性的影响[J].广东电力,2013,26(10):41-44.
[23]汪沨,廖平军,黄俊,等.含污秽薄层的高压复合绝缘子表面电场计算新方法[J].电工技术学报,2016,31(10):77-84.
[2]梁志豪.绝缘子污闪的形成机理及预防措施[J].广东电力,2013,26(6):87-92.
[3]张威,赵新德.污秽绝缘子泄漏电流与湿度及盐密关系综述[J].云南电力技术,2010,38(1):55-57.
[4]王自力,张云刚.浅析绝缘子污闪原因及预防措施[J].云南电力技术,2010,38(1):44-45.
[5]袁贵中,罗森波,罗秋红.广东电网电力污闪事故气象研究[J].云南电力技术,2011,39(4):82-83.
[6]宿志一,李庆峰.我国电网防污闪措施的回顾和总结[J].电网技术,2010,34(12):124-130.
[7]吴光亚,陈原,张胜才,等.绝缘子用常温固化硅橡胶防污闪涂料的应用[J].电力设备,2007,8(10):22-26.
[8]陈原,张章奎,岳乔.以RTV涂料作为永久性反污措施的可行性研究[J].华北电力,2001,12(2):3-4.
[9]孙结中,蒋学军,吕泽承,等.电力设备防污闪复合纳米RTV涂料的研制[J].广西电力,2006(3):1-5.
[10]DL/T 627-2012绝缘子用常温固化硅橡胶防污闪涂料[S].
[11]李桐.RTV涂层表面憎水分布对其防污闪性能的影响[J].宁夏电力,2015(2):31-36.
[12]白欢,陈洪波,李亚伟,等.RTV硅橡胶防污闪涂层运行情况分析[J].有机硅材料,2015,29(02):116-120.
[13]贾志东,陆海,胡亚荣,陈灿.高湿气候下RTV防污闪涂料的运行特性分析[J].电网技术,2014,38(08):2291-2297.
[14]吴明雷,邹淮,王永福,等.不均匀憎水性对线路绝缘子防污效果的影响[J].环境技术,2014(5):5-9.
[15]徐志钮,律方成,刘云鹏,等.室温硫化与高温硫化硅橡胶在交流电晕下憎水特性的比较[J].高电压技术,2011,37(08):1916-1923.
[16]朱可能,关志成,贾志东.RTV硅橡胶涂料防污闪技术及其在天津电网中的应用[J].中国电力,2002,35(05):61-65.
[17]巢亚锋,潘洪峰,黄福勇.硫化硅橡胶涂料在直流输电线路绝缘子上的运行状况研究[J].高压电器,2014,50(11):81-85.
[18]高海峰,贾志东,关志成.运行多年RTV涂料绝缘子表面涂层老化分析研究[J].中国电机工程学报,2005,25(9):158-163.
[19]黄峻峰,齐卫东,张鹏.RTV涂料长期运行后性能分析及复涂方法的研究[J].陕西电力,2007,35(04):43-46.
[20]祝贺,姜宰东.±800kV换流变压器阀侧电容式直流套管电场分析[J].广东电力,2016,29(10):97-101+108.
[21]李如锋,朱赋,胡万波,崔琦.伞裙脆化位置对复合绝缘子电场强度分布的影响[J].广东电力,2015,28(01):96-99.
[22]刘均裕,冯宝,王干军,邓威.PRTV涂料对玻璃绝缘子串电压分布特性的影响[J].广东电力,2013,26(10):41-44.
[23]汪沨,廖平军,黄俊,等.含污秽薄层的高压复合绝缘子表面电场计算新方法[J].电工技术学报,2016,31(10):77-84.