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Open AccessFeature PaperArticle

Control of MMC-Based STATCOM as an Effective Interface between Energy Sources and the Power Grid

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Faculty of Electrical and Computer Engineering, Babol (Noshirvani) University of Technology, PO Box 484, Babol, Iran
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Intelligent Electrical Power Grids at Department of Electrical Sustainable Energy, Delft University of Technology, 5031, 2600 GA Delft, The Netherlands
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Department of Electrical Engineering and Automation, Aalto University, 02150 Espoo, Finland
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Department of System Engineering and Automatic Control, University of Seville, 41004 Seville, Spain
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Management and Production Technologies of Northern Aveiro—ESAN, Estrada do Cercal 449, Santiago de Riba-Ul, 3720-509 Oliveira de Azeméis, Portugal
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Faculty of Engineering of the University of Porto, and INESC TEC, 4200-465 Porto, Portugal
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Authors to whom correspondence should be addressed.
Electronics 2019, 8(11), 1264; https://doi.org/10.3390/electronics8111264
Received: 2 October 2019 / Accepted: 30 October 2019 / Published: 1 November 2019
(This article belongs to the Special Issue Industrial Applications of Power Electronics)
This paper presents a dynamic model of modular multilevel converters (MMCs), which are considered as an effective interface between energy sources and the power grid. By improving the converter performance, appropriate reactive power compensation is guaranteed. Modulation indices are calculated based on detailed harmonic evaluations of both dynamic and steady-state operation modes, which is considered as the main contribution of this paper in comparison with other methods. As another novelty of this paper, circulating current control is accomplished by embedding an additional second harmonic component in the modulation process. The proposed control method leads to an effective reduction in capacitor voltage fluctuation and losses. Finally, converter’s maximum stable operation range is modified, which provides efficiency enhancements and also stability assurance. The proficiency and functionality of the proposed controller are demonstrated through detailed theoretical analysis and simulations with MATLAB/Simulink. View Full-Text
Keywords: circulating current control; modular multilevel converter (MMC); static synchronous compensator (STATCOM) circulating current control; modular multilevel converter (MMC); static synchronous compensator (STATCOM)
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Shahnazian, F.; Adabi, E.; Adabi, J.; Pouresmaeil, E.; Rouzbehi, K.; Rodrigues, E.M.G.; Catalão, J.P.S. Control of MMC-Based STATCOM as an Effective Interface between Energy Sources and the Power Grid. Electronics 2019, 8, 1264.

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