零线断接对三相四线电能表计量影响机理分析

doi:10.3969/j.issn.1000-1158.2023.05.12

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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.

Key words： metrology neutral line disconnection identification zero drift phase voltage distortion three-phase four-wire electric energy meter measurement error

Received: 16 August 2021 Published: 18 May 2023

PACS:

TB971

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	Articles by authors
	DIAO Rui-peng
	WANG Qiang
	LU Zhi-jun

Cite this article:

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[J]. Acta Metrologica Sinica, 2023, 44(5): 750-757.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2023.05.12 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2023/V44/I5/750

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