电阻分压型电子式电压互感器误差分析及对电能计量的影响研究  

Error analysis of resistance dividing type electronic voltage transformer and its impact on electric power measurement

作　　者：段梅梅[1,2] 李振华[3] 李红斌[3] 穆小星 张健[1,2] 

机构地区：[1]江苏省电力公司电力科学研究院,南京210019 [2]国家电网公司电能计量重点实验室,南京210019 [3]华中科技大学电气与电子工程学院,武汉430074

出　　处：《电测与仪表》2015年第2期59-63,79,共6页Electrical Measurement & Instrumentation

基　　金：2013年国家电网公司总部科技项目"智能变电站电测技术监督关键技术研究"的支持;项目编号(52100113058M)

摘　　要：电子式电压互感器的准确度关系着电力系统的安全稳定运行和电能的准确计量。由于技术尚不成熟,电子式电压互感器运行中出现了较多的问题,其中准确度问题占主导地位。目前对于影响电子式互感器准确度的因素的分析研究较少,针对这种问题,文中建立了电阻分压型电子式电压互感器的误差模型,分析了互感器与模拟小信号之间的阻抗匹配问题及对误差大小的影响。在此基础上,文章提出了降低互感器误差的措施,对提高电子式电压互感器的准确度具有一定的意义。The accuracy of the electronic voltage transformer has a great relationship with the safe and stable operation of power system. Because of the technology immaturity,some problems occur during the operation of electronic voltage transformer,in which the accuracy problem is the predominant part. Currently,there are few analyses on the factors affecting the accuracy of electronic instrument transformer. For this reason,the error model of electronic voltage transformer based on resistance dividing is established in this paper,and the impedance matching between the transformer and small analog signal power meter is analyzed. On this basis,the measures to reduce the transformer error are proposed,which has a certain significance to improve the accuracy of electronic voltage transformer.

关 键 词：电阻分压 模拟电子式电压互感器 模拟小信号电能表 阻抗匹配 

分 类 号：TM933[电气工程—电力电子与电力传动]