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局部表面电导率法测量绝缘子憎水性表面的污秽分布 被引量:3

Measurement of Contamination Distribution on the Hydrophobic Surface of Insulators by a Partial Surface Conductivity Method
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摘要 局部表面电导率可以用来有效地表征绝缘子污秽度,但是,对于憎水性表面局部电导率的测量存在困难。为此,通过滴高岭土悬浊液将憎水性局部表面改变为亲水性表面并测量局部区域电导率的新方法,实现了憎水性表面局部电导率的测量。通过对现场绝缘子憎水性表面局部的电导率测量,将新方法与等值盐密法进行了对比以验证新方法的有效性,同时分析了2种测量方法的测量结果存在差异的原因。研究发现:电场作用、绝缘子表面材料、环境气候等因素均会对绝缘子表面的污秽分布造成影响:直流换流站中正极性设备的积污普遍重于负极性设备;同样的外界条件下,RTV表面积污重于复合硅橡胶表面;降雨较少的地区迎风面积污重于背风面,降雨较多的气候下背风面积污重于迎风面。相关研究方法及结论,可用以对绝缘子憎水性表面的积污规律进行长期的研究分析。 Partial conductivity can reflect the degree of pollution on insulators effectively. However, it is difficult to measure on hydrophobic surfaces. Hence, we introduced a new method that changes a part of hydrophobic surface into hydrophilic by dipping kaolin suspension liquid to realize measurement of partial conductivity on hydrophobic surfaces. With the proposed method, measurements were carried out on hydrophobic surfaces for site insulators. Comparison with ESDD measurements proves the validity of the proposed method, and reasons for the difference between results of the two methods were analyzed as well. Further analysis on the results show that electric field, surface material of insulators and climate all influence pollution distribution: in HVDC converter stations, positive DC insulators are contaminated more heavily than negative DC insulators; in the same environment, the contamination on RTV surface is more serious than that on silicone rubber; windward side has more contamination than leeward side in the region with low rainfall, yet leeward side has more contamination in rainy climate. Methods and results of this paper are useful for long-term rule re- searches of pollution accumulation on insulators.
作者 关志成 郭晨鋆 王耿耿 梅红伟 王黎明 项阳 GUAN Zhicheng1, GUO Chenjun1, WANG Genggeng1, MEI Hongwei1, WANG Liming1, XIANG Yang2 (1.Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China; 2. Institute of Science and Technology of China Southern Power Grid, Guangzhou 510000, China)
出处 《高电压技术》 EI CAS CSCD 北大核心 2014年第4期957-964,共8页 High Voltage Engineering
基金 国家重点基础研究发展计划(973计划)(2009CB724503) 南网重大科技项目.
关键词 绝缘子 憎水性 高岭土悬浊液 污秽分布测量 局部表面电导率 等值盐密法 insulator hydrophobic contamination kaolin suspension liguid measure the distribution of contamination the conductivity of partial surface ESDD measurement
作者简介 关志成1944-,男,博士,教授,博导主要研究方向为电力系统外绝缘、特高压输电、输变电设备电。聚、电磁环境等电话:(0755)26036385E—mail:guanzc@mail.tsinghua.edu.cn 郭晨鋆1988-,男,硕十生主要从事特高压直流输电设备积污特性的研究工作电活:(0755)26036423E—mail:guochenjunsmile@yahoo.com.cn 王耿耿1991-,男,硕士生 主要从事特高压直流输电设备积污特性的研究工作电话:(0755)26036423E-mail:wgg151@163.com 梅红伟1979-,男,博士主要从事高电压与绝缘技术方面以及输变电线路外绝缘状态监测评估方面的研究电话:(0755)26036693 E-mail:Meihw07@mails.tsinghua.edu.cn 王黎明1963-,男,博士(后),教授,博导主要从事高电压外绝缘、输变电设备电聚、电磁环境及电工新技术的研究电话:(0755)26036695E—mail:wanglm@sz.tsinghua.edu.cn 项阳1985-,男,硕士,工程师主要从事商压电器电场计算及电力系统过电压研究E—mail:xiangyang@csg.cn
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