不同工况下各类单相电能表计量性能研究  

Performance of Single-Phase Power Metering under Different Operating Conditions

作　　者：丁黎[1] 李莉[1] 刘莉[1] 申建[2] 

机构地区：[1]国网湖北省电力公司电力科学研究院,武汉430077 [2]国网湖北黄石供电公司,湖北黄石435000

出　　处：《电测与仪表》2013年第S1期78-82,共5页Electrical Measurement & Instrumentation

摘　　要：农村低压配网(220V/380V)具有线路供电半径过大,用电负荷较小,线路末端电压普遍偏低等特点,为了提高农村地区低压集抄建设质量,确保用户计量器具准确可靠,本文从工作电压、负载电流、功率因数三个影响因素出发,对机械式、电子式和智能型三种单相电能表的计量性能进行了研究分析。结果表明,单相机械式电能表和单相电子式电能表的计量范围高于单相智能表,但前两者容易受到功率因数和负载电流变化的影响,而单相智能表在可计量的电压范围内受其他因素的影响小,误差平稳,线性度好。Some low voltage distribution networks (220V/380V) have typical characteristics, such as large power sup-ply radius, low electricity load, and low terminal voltage, etc. In this paper the measurement performance of some in-telligent energy meter used in the previous 15 years is described from the working voltage, load current, power factor. It shows that the measurement region of single-phase mechanical energy meter and single-phase electronic energy me-ter is wider than that of single-phase intelligent energy meter. However, the former two types are easily affected by the power factor and load current. Single-phase intelligent energy meter has a better stability and lower error.

关 键 词：单相机械式电能表 单相电子式电能表 单相智能表 工作电压 负载电流 功率因数 

分 类 号：TM933.42[电气工程—电力电子与电力传动]