复合绝缘子表面不同状态时的放电特征

发布时间：2018-06-23 09:12

本文选题：复合绝缘子 + 表面状态　；参考：《高电压技术》2014年04期

【摘要】：复合绝缘子不同表面状态会出现不同放电现象,为此根据复合绝缘子表面放电的剧烈程度将复合绝缘子表面放电分为微弱性放电、间隙性电弧放电、持续性电弧放电3种类型。经过大量试验,统计分析了不同放电类型下泄漏电流的谐波特征和相角特征,建立了放电类型与泄漏电流谐波和相角的关系,并研究了复合绝缘子不同污秽和憎水性对表面放电类型的影响。结果表明:通过分析泄漏电流的谐波特性和相角特性,可以得出绝缘子不同表面状态所对应的放电类型及其特征。复合绝缘子表面憎水性变差时,微弱放电比例略有减少,部分间隙性电弧放电转变成持续电弧放电,持续电弧放电比例增加;复合绝缘子表面污秽度变高时,部分微弱性放电转变成间隙性电弧放电及持续性电弧放电,间隙性电弧放电及持续电弧放电比例增大。通过对泄漏电流的特性分析,可以判断出复合绝缘子表面的状态。
[Abstract]:According to the intensity of surface discharge of composite insulator, the surface discharge of composite insulator can be divided into three types: weak discharge, gap arc discharge and persistent arc discharge. After a lot of experiments, the harmonic characteristics and phase angle characteristics of leakage current under different discharge types are statistically analyzed, and the relationship between discharge type and leakage current harmonic and phase angle is established. The influence of different pollution and hydrophobicity of composite insulator on surface discharge type was studied. The results show that by analyzing the harmonic and phase angle characteristics of the leakage current, the discharge types and their characteristics corresponding to the different surface states of the insulator can be obtained. When the surface hydrophobicity of composite insulator becomes worse, the proportion of weak discharge decreases slightly, the partial gap arc discharge changes to continuous arc discharge, and the proportion of continuous arc discharge increases, and when the surface pollution degree of composite insulator becomes higher, The partial weak discharge is transformed into the gap arc discharge and the sustained arc discharge, and the proportion of the gap arc discharge and the sustained arc discharge increases. By analyzing the characteristics of leakage current, the surface state of composite insulator can be determined.
【作者单位】：西安交通大学电气工程学院;中国电力科学研究院;
【基金】：国家重点基础研究发展计划(973计划)(2011CB209406)~~
【分类号】：TM216

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