1000kV标准电压互感器的量值溯源与传递  

Quantity Traceability and Transfer of 1000 kV Standard Voltage Transformers

作　　者：叶国雄[1] 郭克勤[1] 刘彬[1] 刘翔[1] 黄华[1] 

机构地区：[1]国网电力科学研究院,武汉430074

出　　处：《高电压技术》2011年第5期1239-1244,共6页High Voltage Engineering

基　　金：国家电网公司重点科技项目(SGKJ[2006]159)~~

摘　　要：特高压工程用1000 kV电容式电压互感器的校准需要1000 kV标准电压互感器,而我国工频电压比例标准的最高溯源电压等级为500 kV,1000 kV标准电压互感器的量值溯源问题关系到量值的准确。SF6气体标准电容器具有良好的线性度,电流比较仪型高压电容电桥有较高的准确度,且二者的量值都具有可溯源性,由它们组成的系统可对1000 kV标准电压互感器的电压系数进行测量。1000 kV标准电压互感器在60%溯源基准点电压下的误差可以采用比较法溯源到高准确度的500 kV标准电压互感器上,根据基准点误差和电压系数用外推法实现1000 kV标准电压互感器在全量程范围内的量值溯源。采用该方法完成了1000 kV标准电压互感器的溯源,采用比较法对我国第1台特高压工程用1000 kV电容式电压互感器进行了量值传递。结果表明,该方法是可行的,并可用于1000 kV工频电压比例标准的建标。Calibration of 1000 kV capacitor voltage transformer used in ultra high voltage engineering projects needs 1000 kV standard voltage transformer,but the highest traceable voltage grade of power frequency voltage ratio standard is 500 kV in our country.SF6 standard voltage transformer has good linearity,and the high voltage capacitive bridge with current comparator has high accuracy,and both of them have quantity traceability.The system constituted by the SF6 standard voltage transformer and high voltage capacitive bridge can measure voltage coefficient of 1000 kV standard voltage transformer.The error of 1000 kV standard voltage transformer on 60% reference voltage can be traced to a 500 kV standard voltage transformer by comparison method,and the quantity traceability of 1000 kV standard voltage transformer in full measuring range can be realized by error of reference voltage and extrapolation method of voltage coefficient.Therefore,the quantity traceability of 1000 kV standard voltage transformer was accomplished by using this method.The quantity transfer of 1000 kV capacitor voltage transformer used in ultra high voltage engineering projects was realized by comparison method.The result indicates that this method is feasible and can be used for establishing standard of 1000 kV power frequency ratio standard.

关 键 词：1000kV 标准电压互感器 量值溯源 量值传递 电压系数 外推法 

分 类 号：TM835[电气工程—高电压与绝缘技术] TM451