Browsing by Author "Cuzmar Leiva, Rodrigo Hernan"

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    An Improved Reference Generator Based on MPC of Circulating Currents and Common-Mode Voltage for Modular Multilevel Matrix Converters
    (IEEE-Inst Electrical Electronics Engineers Inc, 2024) Cuzmar Leiva, Rodrigo Hernan; Mora, Andres; Pereda, Javier; Aguilera, Ricardo P.
    This article proposes an improved reference generator based on model-predictive-control (MPC) for the modular multilevel matrix converter (M3C). The novelty of the proposal is in optimally obtaining the circulating currents and CMV references to achieve the intercluster balancing (ICB) control and low-frequency oscillations mitigation (LFOM) of the M3C. Additionally, the proposed optimal control problem is designed in the original framework and includes bound constraints for circulating currents and CMV for a proper operation of the M3C. As a result, the MPC-based reference generator allows to regulate the cluster energies with low capacitor voltage ripple and operate at low and equal frequencies while keeping the cluster currents under safe limits. Experimental results have been conducted using a 3 kVA prototype to validate the proposed strategy's effectiveness and high-quality performance.
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    Optimal Fault-Tolerant Reference Generator for Circulating Currents in Modular Multilevel Matrix Converters
    (Springer, 2025) Cuzmar Leiva, Rodrigo Hernan; Mora, Andres; Montenegro, Andrés; Pereda Torres, Javier; Gajardo, José; Aguilera, Ricardo P.; CEDEUS (Chile)
    This article presents an optimal circulating current reference generator to perform the intercluster capacitor voltage balancing in modular multilevel matrix converters (M3C) under branch fault conditions. The proposed reference generator is directly introduced in the original reference frame, enabling a straightforward formulation of the optimal control problem for fault-tolerant operations. This approach allows the reference generator to efficiently provide the optimal circulating current in each branch, thereby balancing the energies of the converter's clusters even during open-circuit branch fault operation. Experimental results on an M3C prototype of 36 submodules are provided to validate the effectiveness and high-quality performance of the proposed strategy.
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    Optimal Fault-Tolerant Reference Generator for Circulating Currents in Modular Multilevel Matrix Converters
    (Institute of Electrical and Electronics Engineers Inc., 2025) Cuzmar Leiva, Rodrigo Hernan; Mora, Andres; Montenegro, Andrés; Pereda Torres, Javier; Gajardo, José; Aguilera, Ricardo P.
    This article presents an optimal circulating current reference generator to perform the intercluster capacitor voltage balancing in modular multilevel matrix converters (M3C) under branch fault conditions. The proposed reference generator is directly introduced in the original reference frame, enabling a straightforward formulation of the optimal control problem for fault-tolerant operations. This approach allows the reference generator to efficiently provide the optimal circulating current in each branch, thereby balancing the energies of the converter's clusters even during open-circuit branch fault operation. Experimental results on an M3C prototype of 36 submodules are provided to validate the effectiveness and high-quality performance of the proposed strategy.