复合绝缘子憎水性检测技术研究进展

Research Progress of Testing Technology for Hydrophobic Nature of Composite Insulator

输电线路是否更换运行中的复合绝缘子需要客观、准确、快速、方便地评判出该复合绝缘子的憎水等级。在提出评判工作的标准后,对国内外憎水等级评判工作进行综述,总结了复合绝缘子憎水等级评判的研究现状。首先,对接触角法、喷水分级法以及表面张力法等几种传统的评判方法进行总结比较,并指出由于动态接触角法能够客观准确地评判出复合绝缘子的憎水等级,该法将广泛地利用于憎水等级评价工作中,尽管目前没有利用于憎水等级的在线评判。其次,对基于数字图像处理的憎水等级评判方法的过程进行总结,针对各个过程国内外所采取的方法进行比较、总结。最后,提出实现多因素多参量评判复合绝缘子憎水等级评判是今后工作的发展方向。

The current evaluation methods for hydrophobic nature of the composite insulators are summarized, including the basic evaluation methods, that is, the contact angle method, water spray classification and surface tension method, and the classification methods of hydrophobie nature based on digital image processing. The processes of classification methods of hy- drophobie nature based on digital image processing are emphatically discussed and compared as well as the advantages and dis- advantages of the adopted methods used in each process. In order to realize the on - line evaluation for hydrophobie nature of composite insulators objectively, accurately, rapidly and conveniently, some suggestions on using the dynamic contact angle to evaluate the hydrophobic nature of composite insulators on line are proposed. At last, it is put forward that using the multi - factor and multi - parameter to evaluate the hydrophobic nature of composite insulator is the development direction of the future researches.