Indirect Matrix Converter-Based Grid-Tied Photovoltaics System for Smart Grids

Thomas Geury, Sonia Ferreira Pinto, Johan Gyselinck and Patrick Wheeler
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Thomas Geury: ETEC Department and MOBI Research Group, Vrije Universiteit Brussel (VUB), Pleinlaan 2, 1050 Brussels, Belgium
Sonia Ferreira Pinto: INESC-ID, Energy Systems, Power Electronics and Power Quality group, Instituto Superior Técnico, University of Lisbon, 1000-029 Lisbon, Portugal
Johan Gyselinck: BEAMS Energy Group, École polytechnique de Bruxelles, Université Libre de Bruxelles, 1050 Brussels, Belgium
Patrick Wheeler: Department of Electrical and Electronic Engineering, The University of Nottingham, Nottingham NG7 2QL, UK

Energies, 2020, vol. 13, issue 20, 1-19

Abstract: This paper proposes an Indirect Matrix Converter (IMC)-based grid-tied Photovoltaic (PV) system for Smart Grids (SGs). The PV array injects current in the ‘dc link’ of the IMC through an inductive link, and is connected to the SG with shunt and series connections, allowing for the compensation of current- and voltage-related Power Quality (PQ) issues, respectively, for the sensitive loads and the SG connection. A direct sliding mode-based controller is proposed to guarantee nearly sinusoidal currents in the connection to the SG, and sinusoidal voltages guaranteeing compliance with international standards, when supplying the sensitive loads. Additionally, a novel control approach for the ‘dc link’ voltage is synthesised to allow for the control of both the PV array current and the power flow to the SG. To guarantee the semiconductors safe commutation an asynchronous commutation strategy is derived. Simulation and experimental results show that the proposed system significantly improves PQ in the SG, minimizing the total harmonic distortion of the currents injected in the SG, and guaranteeing the quality of the voltage supplied to the sensitive loads, even in the occurrence of voltage sags or overvoltages.

Keywords: Indirect Matrix Converter; photovoltaic systems; Power Quality; Smart Grids; sliding mode control; Unified Power Quality Conditioner (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
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