电磁式电压互感器谐波电压测量准确性的仿真与试验研究  

Simulation and experimental research on harmonic voltage measurement accuracy of electromagnetic voltage transformer

作　　者：李玉超[1] 刘开培[1] 乐健[1] 谭甜源[1] 刘阳[1] 李琼林[2] 

机构地区：[1]武汉大学电气工程学院,湖北武汉430072 [2]国网河南省电力公司电力科学研究院,河南郑州450052

出　　处：《武汉大学学报（工学版）》2015年第2期212-215,共4页Engineering Journal of Wuhan University

基　　金：国家自然科学基金青年基金(编号:51307127)

摘　　要：在分析电磁式电压互感器(TV)的结构和工作原理的基础上,对TV的谐波等效电路进行了介绍,并对简化谐波等效电路及其传递函数进行了分析.根据TV的谐波等效电路建立了Simulink仿真模型,通过仿真计算,探究其对不同频率下的谐波电压测量的准确性.设计了相应的物理试验平台,开展了TV谐波测量误差分析的试验研究.仿真和试验结果表明,低次谐波下TV能进行准确的测量,而当谐波次数较高时TV的测量误差随之增加,不满足测量准确性要求.Based on analyzing the structure and working principle of electromagnetic voltage transformer, its harmonic equivalent circuit is introduced; and the simplified harmonic equivalent circuit and its transfer function is analysed. The Simulink simulation model is established based on its harmonic equivalent circuit model; and the measurement accuracy of harmonic voltage is analyzed through the simulation calculation. The corresponding physical test platform is designed to analyze the harmonic measurement error of electro- magnetic voltage transformer by doing physical tests. Simulation and experimental results show that this electromagnetic voltage transformer is still accurate by measuring harmonic with low frequency; but the harmonic measurement error will increase when measuring the harmonic voltage with higher frequency; and the measurement results can not meet the accuracy requirements.

关 键 词：电磁式电压互感器 谐波等效电路 测量误差 物理试验 

分 类 号：TM72[电气工程—电力系统及自动化]