工频磁场对单相电子式电能表影响浅析  

Analysis of Power-Frequency Magnetic Field Effect on Single Phase Electronic Watt-hour Meter

作　　者：王晓东[1] 江小强[1] 王晔[1] 罗冉冉[1] 郭清营[1] 

机构地区：[1]中国电力科学研究院计量研究所,北京100192

出　　处：《电测与仪表》2013年第12期9-12,共4页Electrical Measurement & Instrumentation

摘　　要：通过分析了工频磁场对单相电子式电能表的影响机理,以单相电子式电能表现场安装环境为基础,在实验室搭建仿真平台,对单相电子式电能表进行工频磁场环境下的无负载实验,寻找单相电子式电能表计量准确性与励磁电流、功率因数角的关系,确定工频磁场对单相电子式电能表最不利的相位和方向的条件,同时提出减小工频磁场对单相电子式电能表计量准确性影响的建议。The influence mechanism of power-frequency magnetic field on single phase Watt-hour meter is analyzed. On the basis of meter installation environment, the simulation platform is set up in the laboratory. The power factor test under no-load condition is conducted under the environment of power-frequency magnetic field to find the relationship of Watt-hour meter error to exciting current and power factor angle. The worst conditions of phase and the direction for Watt-hour meter measurement in the environment are determined, and the suggestion that reduce the influence of power-frequency magnetic field on electrical meter measuring accuracy is made.

关 键 词：电能表 工频磁场 功率因数 无负载试验 

分 类 号：TM933[电气工程—电力电子与电力传动]