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Decoupled DC-Link Capacitor Voltage Control of DC–AC Multilevel Multileg Converters

2015; Institute of Electrical and Electronics Engineers; Volume: 63; Issue: 3 Linguagem: Inglês

10.1109/tie.2015.2495295

1557-9948

Sergio Busquets‐Monge, Robert Griñó, Joan Nicolás-Apruzzese, J. Bordonau,

Microgrid Control and Optimization

This paper studies the coupling between the capacitor voltage control loops of diode-clamped (or functionally equivalent) multilevel multileg (multiphase) dc-ac converters. From a complete model of the plant revealing the coupling, a simple approach consisting in multiplying the vector of control commands by a constant matrix is proposed to decouple the control problem and achieve a better controller performance. Simulation and experimental results are presented to prove the superior performance of the proposed decoupled control.