宽频电压互感器误差校准技术研究  

Research on Error Calibration Technology of Broadband Voltage Transformer

作　　者：吴白丁[1,2] 周杭军 路璐 刘卫新[3] 朱重冶 沙玉洲 WU Bai-ding;ZHOU Hang-jun;LU Lu;LIU Wei-xin;ZHU Chong-ye;SHA Yu-zhou(Zhejiang Institute of Metrology,Hangzhou 310018,China;Key Laboratory of Energy and Environmental Protection Measurement of Zhejiang Province,Hangzhou 310018,China;Electric Power Research Institute of State Grid Xinjiang Electric Power Co.,Ltd.,Urumqi 830000,China;Ningbo Sunrise Instruments Co.,Ltd.,Ningbo 315032,China;DaYiHu(Dalian)Instrument Transformer Research Institute Co.,Ltd.,Dalian 116200,China)

机构地区：[1]浙江省计量科学研究院,浙江杭州310018 [2]浙江省能源与环境保护计量检测重点实验室,浙江杭州310018 [3]国网新疆电力有限公司电力科学研究院,新疆乌鲁木齐830000 [4]宁波三维电测设备有限公司,浙江宁波315032 [5]大一互(大连)互感器研究院有限公司,辽宁大连116200

出　　处：《变压器》2023年第7期28-34,共7页Transformer

基　　金：浙江省市场监督管理局科研计划项目NQI-利用储能原理的超大电流发生技术及在新能源领域的应用研究(计划编号:20200104)。

摘　　要：本文笔者提出了用电容分压器进行宽频电压互感器误差校准的方法,分析了介质损耗对电容分压器频率特性的影响机理,建立了介损与传递误差的关系模型,通过对10kV、35kV两种低频电压互感器的校准验证,确定了本方法的合理性和有效性;通过对各项不确定度来源的分析计算,确认本方法可以用来校准0.2级的5Hz~400Hz频率范围内的各种配网计量用电压互感器,这将有助于解决目前国网公司正在开展的20Hz低频示范性电网中的电压互感器校准问题。This paper proposes a method to calibrate the error of broadband voltage transformer with capacitor voltage divider,analyzes the influence mechanism of dielectric loss on the frequency characteristics of capacitor voltage divider,and establishes the relationship model between dielectric loss and transmission error,The calibration verification of 10kV、35kV low-frequency voltage transformers confirms the rationality and effectiveness of this method.Through the analysis and calculation of the sources of various uncertainties,it is confirmed that this method can be used to calibrate various voltage transformers for distribution network measurement within the frequency range of 5Hz~400Hz of class 0.2,which will help to solve the problem of voltage transformer calibration in 20Hz low-frequency demonstration power grid currently carried out by State Grid Corporation of China.

关 键 词：宽频电压互感器 标准电容分压器 介质损耗 频率特性 

分 类 号：TM451[电气工程—电器]