Abstract
Vital traits of a Modular Multilevel Converter (MMC), including size and total cost, are mostly proportional to the circulating current and voltage balancing capabilities. Hence, this article proposes a novel Input-Output Feedback Linearization (IOFL) based control approach strategy incorporated by several virtual compensators. To this end, the detailed mathematical model of the utilized MMC, including both circulating currents and the output ones, is employed to shape the IOFL along with a simple SMs capacitor balancing method. Besides, the dynamic of DC-link voltage along with the SMs capacitor voltage errors is exerted to reach the zero component of the proposed control strategy. The ability of the proposed control mechanism in the presence of load variation and fault condition is verified by simulation results obtained from MATLAB/Simulink environment.
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