Control of Multilevel Converters for High Penetration of Renewable Energies

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Journal Title
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Conference article in proceedings
Date
2021-06-28
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Mcode
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Language
en
Pages
5
Series
Proceedings of the 2021 IEEE 12th International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2021, IEEE International Symposium on Power Electronics for Distributed Generation Systems
Abstract
Increasing integration of converter-interfaced renewable power generation challenges the stability of the frequency in the modern power systems due to the lack of inertia in this type of generators. In this regard, this paper establishes a control method for controlling multilevel converters as an interface between renewable power generation and the power grid, which enables them to operate as voltage-controlled sources, thus grid-forming capabilities like conventional synchronous generators (SGs). In fact, the proposed control technique mimics the behavior of synchronous generators in the control loop of the neutral point clamped (NPC) converter. Consequently, supportive functionalities for frequency stability i.e., inertia and frequency/power oscillation damping will be provided by the multilevel converter as a virtual synchronous generator (VSG). Simulation results in Matlab/Simulink verifies the well-designed inertia and damping features for the interfaced converter as well as appropriate performance of multilevel converter in reducing total harmonic distortion (THD).
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Keywords
Inertia emulation, neutral point clamped (NPC) converter, Oscillation damping, Renewable energy sources (RES), total harmonic distortion (THD)
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Citation
Pouresmaeil , M , Sepehr , A , Sangrody , R , Taheri , S & Pouresmaeil , E 2021 , Control of Multilevel Converters for High Penetration of Renewable Energies . in S K Mazumder , J C Balda , L He , J Liu & A Gupta (eds) , Proceedings of the 2021 IEEE 12th International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2021 . , 9494249 , IEEE International Symposium on Power Electronics for Distributed Generation Systems , IEEE , IEEE International Symposium on Power Electronics for Distributed Generation Systems , Virtual, Online , 28/06/2021 . https://doi.org/10.1109/PEDG51384.2021.9494249