Title: A survey of control strategies for grid connected wind energy conversion system based permanent magnet synchronous generator and fed by multi-level converters

Authors: Youssef Errami; Abdellatif Obbadi; Smail Sahnoun

Addresses: Electronics, Instrumentation and Energy, Exploitation and Processing of Renewable Energy, Department of Physics, Faculty of Science, University Chouaib Doukkali, Eljadida, 24000, Morocco ' Electronics, Instrumentation and Energy, Exploitation and Processing of Renewable Energy, Department of Physics, Faculty of Science, University Chouaib Doukkali, Eljadida, 24000, Morocco ' Electronics, Instrumentation and Energy, Exploitation and Processing of Renewable Energy, Department of Physics, Faculty of Science, University Chouaib Doukkali, Eljadida, 24000, Morocco

Abstract: In this study, two control strategies for speed and power control of three-level neutralpoint (3L-NPC) clamped back-to-back converters in wind energy conversion system (WECS) with permanent magnet synchronous generator (PMSG) are proposed. The system consists of generator side converters (GSCs) and grid side converter (GSC) which share a common DC-link capacitor. The proposed control laws combine sliding mode control (SMC) and vector oriented control (VOC) to maximise the generated power from wind turbine generators (WTGs). Considering the variation of wind speed, the GSC injects the generated power into the AC network, and regulates DC-link voltage. Also, it is employed to achieve unity power factor (UPC). The GSCs are employed to achieve maximum power point tracking (MPPT). To validate the proposed approaches, simulations are carried out with MATLAB/Simulink software. The simulation results demonstrate a good performance in various scenarios.

Keywords: wind electrical system; PMSG; permanent magnet synchronous generator; 3L-NPC; three-level neutral-point; MPPT; maximum power point tracking; SMC; sliding mode control; VOC; vector oriented control; grid.

DOI: 10.1504/IJMIC.2020.113288

International Journal of Modelling, Identification and Control, 2020 Vol.35 No.1, pp.51 - 63

Received: 14 Dec 2019
Accepted: 29 Mar 2020
Published online: 26 Feb 2021 *

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