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Performance improvement of resonant multi-loop controller with odd harmonic injection for standalone three-phase inverter

Mohsen Karimi (Academic Center for Education Culture and Research, Tehran, Islamic Republic of Iran)
Mohammad Pichan (Department of Electrical Engineering, Arak University of Technology, Arak, Iran)
Mehdi Sadri (Academic Center for Education Culture and Research, Tehran, Islamic Republic of Iran)
Seyed Morteza Seyedjafari (Academic Center for Education Culture and Research, Tehran, Islamic Republic of Iran)

World Journal of Engineering

ISSN: 1708-5284

Article publication date: 8 November 2019

Issue publication date: 20 November 2019

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Abstract

Purpose

This paper aims to investigate an improved control method and digital signal processor-based (DSP-based) digital implementation of three-phase standalone inverter. The proposed method is performance developed of the proportional-resonant controller (PRC) with harmonic injection technique, aiming to improve load voltages quality under different loads, especially nonlinear loads. The advanced proposed multi-loop controller is consisted of current harmonic loops for suppressing odd harmonic, which are analyzed in discrete-time domain. Besides, the voltage loop is also used to compensate the output capacitor voltage.

Design/methodology/approach

The proposed method can effectively enlarge output voltage stability with low total harmonics distortion and improve the dynamic transient response. The other advantage of the proposed PRC is the injection of the selective harmonic without any additional calculation compensator.

Findings

The method is given the opportunity to be controlled exactly all harmful outputs with high-quality voltage referenced of the standalone inverter. The proposed method is implemented using a DSP processor (TMS320F28335) and is verified on the 10 kVA three-phase standalone inverter prototype.

Originality/value

The proposed method is performance developed of the PRC with harmonic injection technique, aiming to improve load voltages quality under different loads, especially nonlinear loads.

Keywords

Acknowledgements

The authors would like to express their acknowledgment to the support of Academic Center for Education, Culture and Research of Iran.

Citation

Karimi, M., Pichan, M., Sadri, M. and Seyedjafari, S.M. (2019), "Performance improvement of resonant multi-loop controller with odd harmonic injection for standalone three-phase inverter", World Journal of Engineering, Vol. 16 No. 6, pp. 782-790. https://doi.org/10.1108/WJE-06-2019-0168

Publisher

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Emerald Publishing Limited

Copyright © 2019, Emerald Publishing Limited