Mechanism and elimination of harmonic current injection from single-phase grid-connected PWM converters

Zhou, K. , Qiu, Z., Watson, N. R. and Liu, Y. (2013) Mechanism and elimination of harmonic current injection from single-phase grid-connected PWM converters. IET Power Electronics, 6(1), pp. 88-95. (doi:10.1049/iet-pel.2012.0291)

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Abstract

The mechanism of harmonic current injection from single-phase grid-connected converters is comprehensively investigated. The measurable impacts from grid voltage, converter commutation, power factor, PWM modulation and control strategy are demonstrated on the harmonic current injection. According to the mechanism, a tailor-made control solution which employs a low pass voltage-loop filter and internal model principle-based hybrid current controller, is proposed to eliminate the harmonic current injection from the single-phase grid-connected converters. Experiments are performed to verify the validity of the mechanism and the proposed control method. It not only presents an effective tailor-made solution to the elimination of harmonic current injection from grid-connected power converters, but also provides a mechanism-based benchmark tool to further develop rational grid requirements on the harmonic injection levels in the grid integration of distributed generation units.

Item Type:Articles
Keywords:Power Converter, Harmonics Mechanism, Repetitive Control, Resonant Control
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Zhou, Dr Keliang
Authors: Zhou, K., Qiu, Z., Watson, N. R., and Liu, Y.
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
College/School:College of Science and Engineering > School of Engineering
Research Group:System Power and Energy
Journal Name:IET Power Electronics
Publisher:Institution of Engineering and Technology
ISSN:1755-4535
ISSN (Online):1755-4543

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