直流电压作用下绝缘子表面电荷积聚的研究  

Research on the Insulator Surface Charge Accumulation under DC Voltage

作　　者：汪沨[1] 张乔根[1] 罗毅[1] 姬靖[1] 邱毓昌[1] 

机构地区：[1]西安交通大学电力设备电气绝缘国家重点实验室,西安710049

出　　处：《西安交通大学学报》2002年第4期339-343,共5页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目(59807006);教育部高等学校博士点基金资助项目(20010698014).

摘　　要：为了对直流电压作用下的绝缘子表面电荷进行测量，设计了一种性能优良的新型电容探头，该电容探头具有电荷泄漏少、分辨率高的优点．研究了外施直流电压极性、幅值、作用时间和外界气象条件对表面电荷积聚的影响．研究表明：当外施电压的幅值和作用时间增加时，绝缘子表面电荷密度的平均值逐渐增加；绝缘子表面电荷的分布与外施电压的极性密切相关；睛朗天气要比小雨天气更易积聚表面电荷，说明绝缘子表面电导率对表面电荷积聚是有影响的．A new type of capacitive probe for measuring surface charge distribution is designed. The test results show that the present capacitive probe has high resolution and low leakage current. The surface charge distributions on the surface of different type insulators are measured. A research on the effects of amplitude, polarity and the stressed duration of the applied voltage on the surface charge accumulation is carried out. The present research shows that the average charge density increases with the increase of the amplitude and the duration of the applied voltage. The applied voltage polarity and climate condition have effect on the surface charge distribution.

关 键 词：直流电压 绝缘子 表面电荷 积聚 

分 类 号：TM216[一般工业技术—材料科学与工程]