Finite Control Set MPC with Fixed Switching Frequency Applied to a Grid Connected Single-Phase Cascade H-Bridge Inverter

Roberto O. Ramírez, Carlos R. Baier, José Espinoza and Felipe Villarroel
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Roberto O. Ramírez: Electrical Engineering Deparment, University of Talca, Curicó 3340000, Chile
Carlos R. Baier: Electrical Engineering Deparment, University of Talca, Curicó 3340000, Chile
José Espinoza: Electrical Engineering Deparment, University of Concepción, Concepción 4030000, Chile
Felipe Villarroel: Electrical Engineering Deparment, University of Concepción, Concepción 4030000, Chile

Energies, 2020, vol. 13, issue 20, 1-18

Abstract: Finite control set model predictive control (FCS-MPC) has been widely investigated in recent years due to its ability to handle optimization problems with multiple control objectives in a diverse variety of systems. Moreover, its direct implementation in digital-based systems has made it an attractive strategy in static power converter applications. However, its characteristics such as variable switching frequency and spread harmonic spectrum limit the use of standard MPC due to power losses, audible noise, steady-state performance, and resonances. To mitigate these problems and extend the FCS-MPC applications to new areas, this paper proposes a new hybrid predictive control scheme, capable of achieving a harmonic spectrum distribution similar to that obtained with a pulse-width modulation scheme. The proposed strategy is based on a system model to generate an optimization, and, at the same time, an input restriction in the cost function of the standard FCS-MPC. This new approach is validated through experimental tests carried out in a grid-connected Cascaded H-bridge inverter.

Keywords: FCS-MPC; switching frequency; predictive control; spread spectrum; grid connected inverters (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: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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