局部表面电导率法测量绝缘子憎水性表面的污秽分布

发布时间：2018-05-20 18:12

本文选题：绝缘子 + 憎水性　；参考：《高电压技术》2014年04期

【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。
[Abstract]:The local surface conductivity can be used to characterize the contamination of insulators effectively, but it is difficult to measure the local conductivity of hydrophobic surface. Therefore, a new method of changing hydrophobic local surface to hydrophilic surface and measuring the local conductivity of hydrophobic surface was developed by dropping kaolin suspension solution to realize the measurement of local conductivity of hydrophobic surface. By measuring the local conductivity of the hydrophobic surface of insulators in situ, the new method is compared with the equivalent salt density method to verify the effectiveness of the new method, and the reasons for the difference between the two methods are analyzed. It is found that the influence of electric field, insulator surface material and environmental climate on the distribution of pollution on the insulator surface is obvious: the deposition of the positive polarity equipment in DC converter station is generally more serious than that of the negative polarity equipment; Under the same external conditions, the surface area pollution of RTV is heavier than that of composite silicone rubber, and the upwind area pollution is more serious in the area with less rainfall than the leeward surface, and the leeward area pollution is more serious in the climate with more rainfall than on the upwind surface. The relevant research methods and conclusions can be used to study and analyze the fouling law of insulator hydrophobic surface for a long time.
【作者单位】：清华大学深圳研究生院;南方电网科学研究院;
【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~~
【分类号】：TM216

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