晴朗天气绝缘子泄漏电流响应机理及污秽预测  

Response mechanism and pollution prediction of insulator leakage current in sunny weather

作　　者：林峰 陈灵 陈闽江 何若玫 林朝晖 苏洪辉 丁雪霜 陈月卿 LIN Feng;CHEN Ling;CHEN Minjiang;HE Ruomei;LIN Zhaohui;SU Honghui;DING Xueshuang;CHEN Yueqing(EVH Branch Company of State Grid Fujian Electric Power Co.,Ltd.,Fuzhou 350000,China)

机构地区：[1]国网福建省电力有限公司超高压分公司,福建福州350000

出　　处：《绝缘材料》2023年第5期80-87,共8页Insulating Materials

基　　金：国网福建省电力有限公司科技项目(52130A20000F)。

摘　　要：在武汉绝缘子人工污秽试验场对晴朗天气下XWP2-70和XP-160绝缘子进行大量试验,得到其在不同污秽度下泄漏电流一次谐波与气象因素之间的动态关系,建立不同灰密时绝缘子表面盐密与泄漏电流、环境相对湿度关系的数学模型,利用非线性回归分析方法预测出不同盐密下泄漏电流一次谐波幅值与相对湿度的关系式,获得盐密与关系式系数之间的定量关系。结果表明:绝缘子表面泄漏电流总是在夜间2~6点达到最大值,在白天13~17点下降到最小值,整体呈现马鞍形曲线,泄漏电流一次谐波与湿度呈正相关,与温度呈负相关;在相同湿度、不同温度下,泄漏电流一次谐波几乎相同,但在相同温度、不同湿度下,泄漏电流一次谐波变化较大;泄漏电流主要取决于环境相对湿度,当相对湿度较高时,泄漏电流随着相对湿度的增加而增大得更快,因此建立污秽预测模型应重点考虑湿度的影响。A large number of tests were carried out on XWP2-70 and XP-160 insulators under sunny weather in Wuhan insulator artificial pollution test field,and the dynamic relationship between the first harmonic of leakage current and meteorological factors under different pollution degrees was obtained.The mathematical model of the relationships among the surface salt density of insulators,leakage current,and environment relative temperature under different gray density were established.The relation expression between the first harmonic amplitude of leakage current and the relative humidity under different salt density was predicted by nonlinear regression analysis method,and the quantitative relationship between salt density and the relation expression coefficient was obtained.The results show that the leakage current on insulator surface always reaches the maximum value at 2-6 PM at night,and decreases to the minimum value at 13-17 PM in the day.The overall leakage current curve presents a saddle-shaped curve.The first harmonic of leakage current is positively correlated with humidity and negatively correlated with temperature.Under the same humidity and different temperature,the first harmonics of leakage current are almost the same,but under the same temperature and different humidity,the first harmonics of leakage current change greatly.The leakage current mainly depends on the environment relative humidity,when the relative humidity is higher,the leakage current increases faster with the increase of the relative humidity.Therefore,the influence of humidity should be mainly considered when establishing a pollution prediction model.

关 键 词：绝缘子 泄漏电流 回归分析 等值附盐密度 晴朗天气 

分 类 号：TM216[一般工业技术—材料科学与工程]