零线断接对三相四线电能表计量影响机理分析  

Mechanism of the Disconnection of the Neutral Wire on the Measurement of the Three-phase Four-wire Electric Energy Meter

作　　者：刁瑞朋 王强 卢志俊 DIAO Rui-peng;WANG Qiang;LU Zhi-jun(Qingdao Topscomm Communication Co.,Ltd,Qingdao,Shandong 266109,China;Jin Hua Electric Power Design Institute CO.,Ltd,Jinhua,Zhejiang 321001,China)

机构地区：[1]青岛鼎信通讯股份有限公司,山东青岛266109 [2]金华电力设计院有限公司,浙江金华321001

出　　处：《计量学报》2023年第5期750-757,共8页Acta Metrologica Sinica

摘　　要：针对三相四线线性电源电能表在断接零线的情况下,存在相电压计量值偏高导致计量误差的问题,从三相电路的工作过程出发,探究了电能表零线端子电位漂移的变化规律。从理论上分析了三相四线电能表在零线断接情况下计量电压偏高的原因,并通过仿真和实验验证了理论分析的准确性,提出了一种监测零线电流的方法来识别零线断接,为识别零线断接、提高计量准确性提供了充分的理论支撑。To solve the problem that the phase voltage measurement value is higher than actual value and the measurement error are caused when the neutral line is disconnected for the three-phase four-wire linear power meter.The changing law of the potential drift of the neutral terminal of the electric energy meter from the working process of the three-phase circuit is explored,and the cause of the three-phase four-wire electric energy meter in the neutral line disconnection is analyzed theoretically.The reason is verified to verify the accuracy of the theoretical analysis by simulation and experiment,and a method of neutral line current monitoring is proposed to identify the disconnection of the neutral line,which provides a sufficient theoretical basis for identify the disconnection of the neutral line and improving the accuracy of measurenment.

关 键 词：计量学 零线断接识别 零点漂移 相电压畸变 三相四线电能表 计量误差 

分 类 号：TB971[一般工业技术—计量学]