Mechanism of the Disconnection of the Neutral Wire on the Measurement of the Three-phase Four-wire Electric Energy Meter
DIAO Rui-peng1,WANG Qiang1,LU Zhi-jun2
1. Qingdao Topscomm Communication Co., Ltd, Qingdao, Shandong 266109, China
2. Jin Hua Electric Power Design Institute CO., Ltd, Jinhua, Zhejiang 321001, China
Abstract：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.
刁瑞朋,王强,卢志俊. 零线断接对三相四线电能表计量影响机理分析[J]. 计量学报, 2023, 44(5): 750-757.
DIAO Rui-peng,WANG Qiang,LU Zhi-jun. Mechanism of the Disconnection of the Neutral Wire on the Measurement of the Three-phase Four-wire Electric Energy Meter. Acta Metrologica Sinica, 2023, 44(5): 750-757.
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2023, Vol. 44 
