基于电致发光效应的绝缘子表面场强测量方法  

Method for Measuring Surface Electric Field Intensity of Insulators Based on Electroluminescence Effect

作　　者：杨欣颐 贾云飞 高璐[1] 汲胜昌[1] 李志兵 刘焱 YANG Xinyi;JIA Yunfei;GAO Lu;JI Shengchang;LI Zhibing;LIU Yan(State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,China;China Electric Power Research Institute,Beijing 100192,China)

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 [2]中国电力科学研究院有限公司,北京100192

出　　处：《高电压技术》2021年第4期1411-1419,共9页High Voltage Engineering

基　　金：国家重点研发计划(2017YFB0902500);国家电网有限公司科技项目(环保型管道输电关键技术)。

摘　　要：由于电场探头在测量绝缘子表面场强分布时会产生畸变,为了更加准确地测量绝缘子表面场强分布,基于ZnS:Cu的电致发光效应,提出了一种非接触式测量绝缘子表面场强分布的试验方法。该方法是在绝缘子表面喷涂掺有ZnS:Cu电致发光粉末的环氧树脂涂料,并对其在高场强下的发光进行拍摄,利用图像处理的方法得到绝缘子表面场强的分布。首先在结构较为简单的圆盘绝缘子上进行了可行性验证,在圆盘绝缘子的大部分区域上实现了平均误差为3%的测量;然后将该方法推广至盆式绝缘子,测量所得结果与仿真结果较相符。结果表明:电致发光效应可应用于绝缘子表面场强分布的测量,该方法不会使绝缘子的表面场强发生畸变,为绝缘子表面场强分布的测量提供了一种新思路。Electric field probes may always distort when measuring the electric field intensity distribution on the insulator surface. To measure the field intensity distribution on insulator surface more accurately, based on the electroluminescence effect of ZnS:Cu, a novel non-contact test method was proposed. In this method, an epoxy resin coating mixed with ZnS:Cu electroluminescent powder is sprayed on the surface of the insulator. Its luminescence under different high electric field is photographed. The distribution of electric field intensity on the surface of the insulator is deduced by image processing. Firstly, the feasibility is verified on the disc insulator with a simple structure, and measurements with an average error of 3% are achieved over most areas of the disc insulator. Then, the method is extended to the basin-type insulator. Consistently the measured results are in good agreement with the simulation results. This method provides a new idea which the electroluminescence effect is utilized for measuring the surface electric field intensity distribution of insulators without distorting it.

关 键 词：ZnS:Cu 电致发光效应 盆式绝缘子 表面场强 非接触式测量 

分 类 号：TM216[一般工业技术—材料科学与工程]