殷钢电补偿电极补偿立式计算电容端部效应的研究  

The Research of One New Invar Electrical Compensatory Electrode for Compensating the End-Effect on the Vertical Cross Capacitor

作　　者：黄璐[1] 陆祖良[1] 杨雁[1] 赵建亭[1] 王维[1] 陆文俊[1] 

机构地区：[1]中国计量科学研究院,北京100013

出　　处：《电测与仪表》2014年第5期5-10,共6页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(51207148;51107129;51207149);"十一五"国家科技支撑项目(2006BAF06B04)

摘　　要：立式计算电容常用结构中,位于四根金属圆柱电极中轴线位置的两个屏蔽电极中的可动棒,会在移动前后的两个位置因所在的极间距不一致而引入最大的不确定度———端部效应误差。与国外普遍采用的改良型钉子头来进行补偿不同,现研制了一种带有过渡锥面的殷钢电补偿电极,通过调整加载在其中心隔离辅助电极上面的电压来达到补偿的目的。在同一个计算电容模型装置进行的同等条件下的模型对比实验证明,殷钢电补偿电极补偿效果比改良型钉子头好最大几十倍。In the usual structure of vertical cross capacitor, one fixed and another movable guard electrodes are loca-ted on the axis of four metal cylindrical electrodes. As the movable one moves from the lower position to the higher po-sition, the variation of the diagonal spacing will introduce the maximum uncertainty of end effect to the whole system. Different from the nosepiece adopted in many national institutes in the world, this paper develops one new invar elec-trical compensatory electrode with transition cone zone, in which a fraction of measuring voltage is applied to an isola-ted assistant electrode for compensating the end effect. The model tests on the same primitive calculable capacitor model device confirmed that the new invar electrical compensatory electrode performed maximum dozens of times better than the nosepiece.

关 键 词：殷钢电补偿电极 改良型钉子头 端部效应 

分 类 号：TM933[电气工程—电力电子与电力传动]