500kV标准电压互感器量值溯源方法研究  

Research on Value Traceability Method of 500kV Standard Voltage Transformer

作　　者：刘罡 秦悦维 姜春阳[2] LIU Gang;QIN Yuewei;JIANG Chunyang(State Grid Liaoning Marketing Service Center,Shenyang 110006,China;China Electric Power Research Institute,Wuhan 430074,China)

机构地区：[1]国网辽宁省电力有限公司营销服务中心,辽宁沈阳110006 [2]中国电力科学研究院,湖北武汉430074

出　　处：《山东电力技术》2021年第8期39-43,共5页Shandong Electric Power

基　　金：国家重点研发计划项目(2017YFF02057010);国家电网有限公司科技项目“智能配电网一二次融合传感器及其校验技术研究”(JL71-18-018)。

摘　　要：为解决在实验室本地完成500 kV标准电压互感器溯源问题,在40%额定电压以下采用直接比较法,40%额定电压以上采用由全电压加法、半电压加法和电压系数法组成的互感器串联加法完成溯源,最终得到120%额定电压以下全部比值误差和相位误差值。从测量重复性、多盘感应分压器、220 kV标准电压互感器、误差测量装置4部分进行不确定度评定,计算了合成标准不确定度和扩展不确定度,并采用传递比较法进行了不确定度比对验证,证明溯源结果符合要求。所研究的方法有效避免了500 kV标准电压互感器长途运输造成标准器损坏的隐患,能够有效保证电能计量的准确可靠性。In order to solve the value traceability problem of 500 kV standard voltage transformer in the laboratory,direct comparison method was used below 40% rated voltage,and transformer series summation method composed of full voltage addition,half voltage addition and voltage coefficient method was used above 40% rated voltage.All ratio error and phase error values below 120% rated voltage were obtained.The uncertainty was evaluated from four parts:measurement repeatability,multi⁃disk inductive voltage divider,220 kV standard voltage transformer and error measurement device.The combined standard uncertainty and expanded uncertainty were calculated,and the transfer comparison method was used to compare and verify the uncertainty,which proves that the traceability results meet the requirements.The proposed method can effectively avoid the potential damage of 500 kV standard voltage transformer caused by long⁃distance transportation,and can effectively ensure the accuracy and reliability of electric energy measurement.

关 键 词：量值溯源 直接比较法 串联加法 不确定度评定 比对验证 

分 类 号：TM45[电气工程—电器] TM93