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.
出处
《电测与仪表》
北大核心
2013年第12期9-12,共4页
Electrical Measurement & Instrumentation
关键词
电能表
工频磁场
功率因数
无负载试验
Watt-hour meter
power-frequency magnetic field
power factor
test of no-load condition
