均匀场域中工频电场畸变效应分析  

Analysis of power frequency electric field distortion effect on uniform electric field

作　　者：张占龙[1] 胡平[1] 李敬雄 彭孟杰[1] 周军[2] 黄嵩[1] 唐炬[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044 [2]四川自贡电业局,四川自贡643000

出　　处：《重庆大学学报（自然科学版）》2012年第4期19-25,共7页Journal of Chongqing University

基　　金：国家重点基础研究计划(973)资助项目(2009CB724506);重庆市自然科学基金资助项目(cstc2011jjA2000g);中国电机工程学会电力青年科技创新项目(QNXM08-24);重庆大学'211工程'三期创新人才培养计划建设资助项目(No.S-09111)

摘　　要：空间电场测量时,因电场传感器探头被引入到测量域中,探头附近的电场将发生畸变,而影响电场测量精度。以球形探头为研究对象,利用分离变量法分析了均匀电场中引起电场畸变的影响因素,具体分析了10kV电压下,球形传感器探头尺寸、电极材质以及测量电极的极间耦合对电场畸变的影响。根据传感器感应电压与电场强度大小成线性关系,利用影响因子矩阵对电场畸变进行了校正分析。分析结果表明,在均匀电场中探头附近和主电极与副电极之间产生较严重的电场畸变,平均畸变率在27%以上;利用影响因子矩阵对电场畸变进行校正后平均误差为4.47%左右。通过对球形探头传感器在均匀场域中的工频电场测量的畸变效应分析,有利于降低畸变对电场测量影响,提高电场测量的精确性。The electric field sensor for the measurement of electric field in the space where the sensor probe will cause distortion in the vicinity,so it will affect the measurement of electric field accuracy. This paper uses the separation of variables method to calculate the electric field distortion caused by spherical sensor probe in uniform electric field,and detailed analysis of the 10 kV voltage,the spherical probe size,electrode material and the measuring electrode pole coupling caused the impact of electric field distortion. According to the induced voltage of sensor and the linear relationship between electric field strength, using the impact factor matrix to correct the electric field distortion. The result shows that the vicinity of the probe and the primary measuring electrodes and sub-electrodes measuring produce more serious distortion in the uniformelectric field. The average distortion rate is more than 27% ;however,after the impact factor matrix is used to correct the electric field distortion,the average error is about 4.47%. By analysis of the measurement of the electric field distortion with the spherical probe of sensor, it is conducive to reduce the impact of distortion on the electric field measurement and to improve the accuracy of field measurement.

关 键 词：电场测量 畸变 工频电场 三维球形探头 测量电极 

分 类 号：TM935.24[电气工程—电力电子与电力传动]