高污秽度环境中绝缘子积污特性研究
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摘要
在宁夏石嘴山高污秽度地区搭建积污站,以垂直悬挂、斜拉悬挂和水平悬挂的方式模拟I串、V串和耐张串悬挂不同伞型的瓷、玻璃和复合绝缘子。经过一定积污期之后,测试绝缘子的等值盐密(ESDD)、灰密(NSDD)、可溶盐离子成分和颗粒度,分析不同悬挂方式、不同材质绝缘子的积污特性。结果表明:在高污秽度环境中绝缘子积污主要受污秽自由沉降的影响,上表面污秽度高于下表面,上下表面积污不均匀程度从大到小的顺序为I串、V串、耐张串,双伞和三伞型绝缘子的污秽度高于钟罩型绝缘子,复合绝缘子的污秽度高于瓷和玻璃绝缘子。绝缘子污秽成分以CaSO4为主,粒径主要分布于0.2～100μm。
A contamination accumulation station was built in a typical heavy polluted environment in Shizuishan city, Ningxia province. Porcelain, glass, and composite insulators were vertical suspended, inclined suspended, and horizontal suspended to simulate I string, V string, and tension string insulators, respectively. After a period of pollution accumulating, the equivalent salt deposit density(ESDD), non-soluble deposit density(NSDD), soluble salt ion composition, and contaminant size of these insulators were measured, and the contamination accumulation characteristics of insulators with different materials in different suspension ways were analyzed. The results show that the contamination of insulators is mainly affected by free deposition in heavy polluted environment, and the contamination on the upper surface is more than that on the lower surface. The uneven level of contamination accumulation on the upper and lower surface of insulators decreases in the order of I string, V string, and tension string insulators. The contamination accumulation of two umbrella-type and three umbrella-type insulators is more than that of bell-type insulators, and the contamination accumulation of composite insulator is more than that of porcelain and glass insulators. The main component of contamination is CaSO4 and its size mainly ranges from 0.2 μm to 100 μm.
A contamination accumulation station was built in a typical heavy polluted environment in Shizuishan city, Ningxia province. Porcelain, glass, and composite insulators were vertical suspended, inclined suspended, and horizontal suspended to simulate I string, V string, and tension string insulators, respectively. After a period of pollution accumulating, the equivalent salt deposit density(ESDD), non-soluble deposit density(NSDD), soluble salt ion composition, and contaminant size of these insulators were measured, and the contamination accumulation characteristics of insulators with different materials in different suspension ways were analyzed. The results show that the contamination of insulators is mainly affected by free deposition in heavy polluted environment, and the contamination on the upper surface is more than that on the lower surface. The uneven level of contamination accumulation on the upper and lower surface of insulators decreases in the order of I string, V string, and tension string insulators. The contamination accumulation of two umbrella-type and three umbrella-type insulators is more than that of bell-type insulators, and the contamination accumulation of composite insulator is more than that of porcelain and glass insulators. The main component of contamination is CaSO4 and its size mainly ranges from 0.2 μm to 100 μm.
引文
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[3]邱志贤.关于污秽条件下使用的高压绝缘子的选择和尺寸确定方法[J].电瓷避雷器,2010(5):6-11.
[4]宿志一,周军,高海峰,等.±800kV长串绝缘子污闪特性及绝缘子选择研究(英文)[J].中国电机工程学报,2009,29(22):94-99.
[5]郝艳捧,黎卫国,阳林,等.高海拔地区直流耐张绝缘子布置方式对其污闪特性的影响[J].高电压技术,2011,37(1):34-39.
[6] DONG Hongchuan, XU Wenjie, CAO Bin, et al. Natural contamination deposition characteristics based on natural contamination testing station[C]//Conference on Electrical Insulation and Dielectric Phenomena. Ann Arbor,USA:IEEE,2015:403-406.
[7]刘辉,孙家祥,沈庆河,等.±660kV银东线瓷绝缘子的积污特性研究[J].绝缘材料,2017,50(11):63-68.
[8]王康,王建国,江健武,等.涂覆RTV对瓷绝缘子盐密和灰密影响的对比观测[J].高电压技术,2012,38(4):847-854.
[9]叶汉欣.污秽成分对复合绝缘子闪络特性的影响研究[D].重庆:重庆大学,2015.
[10]蒋兴良,舒立春,张永记,等.人工污秽下盐/灰密对普通悬式绝缘子串交流闪络特性的影响[J].中国电机工程学报,2006,26(15):24-28.
[11]贾志东,曾智阳,陈灿,等.特殊污秽条件下电流互感器复合绝缘外套电蚀损缺陷机理分析[J].电网技术,2015,39(10):2915-2922.
[12]刘世涛,郭飞,王博,等.液体硅橡胶伞裙电蚀损修复方法及修复后性能研究[J].绝缘材料,2016,49(10):76-79.
[13]中国国家标准化管理委员会.污秽条件下使用的高压绝缘子的选择和尺寸确定第1部分:定义、信息和一般原则:GB/T26218.1—2010[S].北京:中国标准出版社,2011.
[14]王黎明,王耿耿,黄睿,等.降雨对绝缘子表面污秽的清洗作用[J].电网技术,2015,39(6):1703-1708.
[15]孙保强,绝缘子积污特性及测量方法研究[D].北京:清华大学,2013.
[16]郭飞,刘世涛,李秀广,等.宁夏典型环境绝缘子污秽成分分析[J].绝缘材料,2017,50(4):61-66.