Finite-Control-Set Model Predictive Control for Low-Voltage-Ride-Through Enhancement of PMSG Based Wind Energy Grid Connection Systems

Syed Wajahat Ali, Anant Kumar Verma, Yacine Terriche, Muhammad Sadiq, Chun-Lien Su (), Chung-Hong Lee and Mahmoud Elsisi
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Syed Wajahat Ali: Electrical Engineering Department, National Kaohsiung University of Science and Technology, Kaohsiung City 807618, Taiwan
Anant Kumar Verma: Electric Power Conversion Systems Laboratory (SCoPE Lab), Universidad de O’Higgins, 611, Av. Libertador Bernardo O’Higgins, Rancagua 2820000, Chile
Yacine Terriche: Center for Research on Microgrids, Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark
Muhammad Sadiq: Electrical Engineering Department, National Kaohsiung University of Science and Technology, Kaohsiung City 807618, Taiwan
Chun-Lien Su: Electrical Engineering Department, National Kaohsiung University of Science and Technology, Kaohsiung City 807618, Taiwan
Chung-Hong Lee: Electrical Engineering Department, National Kaohsiung University of Science and Technology, Kaohsiung City 807618, Taiwan
Mahmoud Elsisi: Electrical Engineering Department, National Kaohsiung University of Science and Technology, Kaohsiung City 807618, Taiwan

Mathematics, 2022, vol. 10, issue 22, 1-22

Abstract: Grid faults are found to be one of the major issues in renewable energy systems, particularly in wind energy conversion systems (WECS) connected to the grid via back-to-back (BTB) converters. Under such faulty grid conditions, the system requires an effective regulation of the active (P) and reactive (Q) power to accomplish low voltage ride through (LVRT) operation in accordance with the grid codes. In this paper, an improved finite-control-set model predictive control (FCS-MPC) scheme is proposed for a PMSG based WECS to achieve LVRT ability under symmetrical and asymmetrical grid faults, including mitigation of DC-link voltage fluctuation. With proposed predictive control, optimized switching states for cost function minimization with weighing factor (WF) selection guidelines are established for robust BTB converter control and reduced cross-coupling amid P and Q during transient conditions. Besides, grid voltage support is provided by grid side inverter control to inject reactive power during voltage dips. The effectiveness of the FCS-MPC method is compared with the conventional proportional-integral (PI) controller in case of symmetrical and asymmetrical grid faults. The simulation and experimental results endorse the superiority of the developed FCS-MPC scheme to diminish the fault effect quickly with lower overshoot and better damping performance than the traditional controller.

Keywords: model predictive control; PI control; wind energy; PMSG; reactive power; LVRT capability; grid faults (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2022
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