Optimized Circulating Current Control and Enhanced AC Fault Ride-through Capability Using Model Predictive Control for MMC-HVDC Applications

Jahangeer Badar Soomro, Faheem Akhtar Chachar, Madad Ali Shah, Abdul Aziz Memon, Faisal Alsaif () and Sager Alsulamy
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Jahangeer Badar Soomro: Department of Electrical Engineering, Sukkur IBA University, Sukkur 65200, Pakistan
Faheem Akhtar Chachar: Department of Electrical Engineering, Sukkur IBA University, Sukkur 65200, Pakistan
Madad Ali Shah: Department of Electrical Engineering, Sukkur IBA University, Sukkur 65200, Pakistan
Abdul Aziz Memon: Department of Electrical Engineering, Sukkur IBA University, Sukkur 65200, Pakistan
Faisal Alsaif: Department of Electrical Engineering, College of Engineering, King Saud University, Riyadh 11421, Saudi Arabia
Sager Alsulamy: Sustainable Energy Research Group, Energy & Climate Change Division, Faculty of Engineering & Physical Sciences, University of Southampton, Southampton SO16 7QF, UK

Energies, 2023, vol. 16, issue 13, 1-19

Abstract: This paper presents a novel model predictive control (MPC) approach for suppressing circulating currents in MMC-based HVDC systems. The proposed MPC eliminates the need for PI-regulators and pulse width modulators, resulting in improved dynamic response and controllability. The methodology demonstrates exceptional efficacy in controlling output current and addressing voltage ripple concerns associated with sub module (SM) capacitors. An innovative, communication-free fault ride-through (FRT) method is also introduced, eliminating the need for a DC chopper and ensuring rapid recovery following faults. To overcome the computational challenges associated with the traditional MPC algorithm, an aggregate model of the MMC is proposed, significantly reducing predicted states, hardware requirements, and calculations. Simulations validate the robustness of the proposed MPC control algorithm in tracking AC side current, suppressing circulating current, and regulating capacitor voltages under various scenarios. Future research will explore system expansion, integration with renewable energy sources, and hardware-in-loop setup testing for further validation.

Keywords: HVDC; fault ride-through (FRT); modular multilevel converter (MMC); circulating current control; model predictive control (MPC); capacitor voltage ripple (CVR) (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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