适合高精度关口电能表检定的小电流标准功率源设计  

Design of Low Current Standard Power Source for High-Precision Gateway Watt-Hour Meter Verification

作　　者：杨静 曾伟杰 王智 申丽曼 苏玉萍 YANG Jing;ZENG Weijie;WANG Zhi;SHEN Liman;SU Yuping(State Grid Hunan Electric Power Company Limited Power Supply Service Center(Measuring Center),Changsha 410004,China)

机构地区：[1]国网湖南省电力有限公司供电服务中心(计量中心),湖南长沙410004

出　　处：《湖南电力》2022年第1期38-42,共5页Hunan Electric Power

摘　　要：针对高精度关口电能表检定中0.3 A小电流输出准确度低的问题,提出基于跨阻负反馈的小电流输出方案,设计反馈测量模块和噪声滤波单元,研制一种小电流标准功率源。实验结果表明所设计的小电流标准功率源稳定可靠,解决了0.3 A及以上关口电能表小电流点检定溯源问题。In order to solve the problem that the accuracy of 0.3 A low current output is low in the verification of high precision gateway watt-hour meter,a low current output scheme based on trans-resistance negative feedback is proposed,and the feedback measurement module and noise filtering unit are designed,a low current standard power source is developed.The experimental results show that the designed small current standard power source is stable and reliable,and the problem of verification and tracing of small current points in 0.3 A and above gateway meter is solved.

关 键 词：关口电能表 检定 标准源 小电流 

分 类 号：TM933[电气工程—电力电子与电力传动]