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

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 cu...

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Bibliographic Details
Published in:Energies (Basel) 2020-10, Vol.13 (20), p.5405
Main Authors: Geury, Thomas, Pinto, Sonia Ferreira, Gyselinck, Johan, Wheeler, Patrick
Format: Article
Language:English
Subjects:
Arrays
Commutation
Electronics industry
Energy management
Harmonic distortion
Indirect Matrix Converter
International standards
Load
Loads (forces)
photovoltaic systems
Photovoltaics
Power flow
Power Quality
Sine waves
Sliding mode control
Smart Grids
Unified Power Quality Conditioner
Voltage
Voltage sags
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Summary: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.
ISSN:1996-1073
1996-1073
DOI:10.3390/en13205405