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Comparison of Fixed Switching Frequency Based Optimal Switching Vector MPC Algorithms Applied to Voltage Source Inverter for Stand-alone Applications
S.K. Gannamraju, D. Valluri,
Published in Institute of Electrical and Electronics Engineers Inc.
2019
Abstract
Model predictive control (MPC) has become an attractive solution for power converter control due to its superior dynamic performance, simplicity, and one stop solution for multi-objective systems. Among all the existing MPC techniques, optimal switching vector MPC (OSV-MPC) is intuitive and utilizes the discrete nature of power converters. By nature, basic OSV-MPC generates variable switching frequency which causes poor THD, high switching losses, difficulties in filter design, and ripples in the control parameters. To overcome the above mentioned issues with variable switching frequency, fixed switching frequency based OSV-MPC algorithms were reported in the literature for current control applications. However, the application of fixed switching frequency methods for voltage control is limited in the literature. So, this paper discusses the applicability of existing fixed switching frequency methodologies to control load voltage for stand alone applications. Basic three-phase two-level voltage source inverter with LC filter is used for a case study. Simulation results are included for different OSV-MPC fixed switching frequency methods using MATLAB®/Simulink. Harmonic performance, transient performance, and computational burden have been discussed and compared with the conventional OSV-MPC. © 2019 IEEE.
About the journal
JournalData powered by Typeset2019 National Power Electronics Conference, NPEC 2019
PublisherData powered by TypesetInstitute of Electrical and Electronics Engineers Inc.