电流比较仪空载转分离线路分析及不确定度评定  

Analysis of No-load Circuit to Separating Circuit and Uncertainty Evaluation for Current Comparator

作　　者：刘罡 姜春阳[2] 房琛 LIU Gang;JIANG Chunyang;FANG Chen(Electric Power Research Institute of State Grid Liaoning Electric Power Co.,Ltd.,Shenyang 110006,China;China Electric Power Research Institute,Wuhan 430074,China;Dalian Electric Power Construction Engineering Co.,Ltd.,Dalian 116021,China)

机构地区：[1]国网辽宁省电力有限公司电力科学研究院,辽宁沈阳110006 [2]中国电力科学研究院,湖北武汉430074 [3]大连电力建筑工程公司,辽宁大连116021

出　　处：《山东电力技术》2020年第6期18-22,共5页Shandong Electric Power

基　　金：国家电网公司科技项目“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：工频电流比例标准常用的试验线路为空载线路和分离线路。一次电流为5~50 A时,须采用空载线路,其余情况多采用分离线路。为得到被检电流比较仪的最终分离线路误差,对空载自校线路、分离自校线路与空载转分离线路进行分析和试验。通过计算合成标准不确定度和扩展不确定度对试验结果进行不确定度评定。试验结果表明,所提方法满足相关要求,为后续传递标准和工作标准的乘、除法线路的测量奠定基础。The common test circuits of current ratio standards at power frequency are no-load circuit and separating circuit.When the primary current is between 5 A and 50 A,the no-loaded circuit should be used.The rest of the case should mostly adopt the separating circuit.In order to obtain the final separation circuit error of the current comparator being tested,the no-load self-calibration circuit,separation self-calibration circuit and no-load to separation circuit are analyzed and tested.The uncertainty of test results is evaluated by calculating the uncertainty of composite standard and expanded uncertainty.The test results show that the proposed method meets the relevant requirements,and lays a foundation for the measurement of multiplication and division circuits in the following transfer standards and working standards.

关 键 词：工频电流比例标准 空载线路 分离线路 补偿式电流比较仪 不确定度评定 

分 类 号：TM93[电气工程—电力电子与电力传动]