直流电子式电压互感器的误差特性分析  

Error characteristic analysis of DC electronic voltage transformer

作　　者：唐登平 郑欣 雷鸣 王尚鹏 吴元相 刘开培[2] Tang Dengping;Zheng Xin;Lei Ming;Wang Shangpeng;Wu Yuanxiang;Liu Kaipei(Metering Center of State Grid Hubei Electric Power Co.,Ltd.,Wuhan 430018,China;School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,China)

机构地区：[1]国网湖北省电力公司计量中心,武汉430018 [2]武汉大学电气与自动化学院,武汉430072

出　　处：《电测与仪表》2021年第2期107-111,共5页Electrical Measurement & Instrumentation

基　　金：国网湖北电力公司科技项目(521532170015)。

摘　　要：直流电子式电压互感器的准确度关系到直流输电系统电能的准确计量。目前直流电子式电压互感器在实际运行中存在准确度的问题,而对于直流电子式互感器测量误差的分析研究较少。文中对直流电子式电压互感器各个环节建立误差模型,分析了分压器本体误差、远端模块A/D转换误差和合并单元插值误差,并给出理论误差的范围,发现直流电子式电压互感器的误差主要来自分压器本体。最后对互感器进行误差测试试验,试验结果与理论误差范围基本一致。The accuracy of DC electronic voltage transformer is related to the accurate metering of power in DC transmission system.At present,the accuracy problem of DC electronic voltage transformer exists in practical operation,while there is little research on measurement error of DC electronic voltage transformer.Therefore,this paper establishes error model for each link of DC electronic voltage transformer,analyzes the error of voltage divider body,A/D conversion error of remote module and interpolation error of merging unit,and the range of theoretical error of each part is given.It is concluded that the error of DC electronic voltage transformer mainly origins from the voltage divider body.Finally,the error test of transformer is carried out,and the experimental results are basically consistent with the theoretical error range.

关 键 词：直流电子式电压互感器 误差模型 分压器本体 远端模块 合并单元 

分 类 号：TM933[电气工程—电力电子与电力传动]