Study on Measurement of Three-Phase Asymmetric Loads Based on Parameter Identification

doi:10.11930/j.issn.1004-9649.2013.8.128.4

Abstract

Abstract: Taking the three-phase four-wire system as an example, the impact of asymmetric loads on electric energy measurement is studied. In this paper a new method to improve the electric load measurement based on virtual neutral point voltage parameter identification is proposed, that is, under unknown load parameters at the consumer side, the virtual neutral point voltage is identified with the voltage and current waveforms sampled synchronously at the point of common coupling of three-phase load, so as to accurately measure and compute the value of three-phase loads. Through the simulation using Matlab, the electric power measurement values with traditional method and parameter identification method are compared respectively regarding the actual load consumption values, which verifies the accuracy and reasonableness of the proposed method.

Key words: asymmetric load, virtual neutral point voltage, parameter identification, electric energy measurement

CLC Number:

TM933

QIU Shu-min, YANG Hao, YIN Jia-min, OU Yong, LUO Jian. Study on Measurement of Three-Phase Asymmetric Loads Based on Parameter Identification[J]. Electric Power, 2013, 46(8): 128-132.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2013.8.128.4

https://www.electricpower.com.cn/EN/Y2013/V46/I8/128

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