ORIGINAL PAPER
Modulated model predictive current control technique for single phase nine-level T-type packed U-cell inverter topology
Aratipamula Bhanuchandar,
Bhagwan K. Murthy,
Corresponding Author
Aratipamula Bhanuchandar
Department of Electrical Engineering, National Institute of Technology Warangal, Warangal, India
Correspondence
Aratipamula Bhanuchandar, Department of Electrical Engineering, National Institute of Technology Warangal, Telangana State, Warangal, 506004, India.
Email: [email protected]
Search for more papers by this authorBhagwan K. Murthy
Department of Electrical Engineering, National Institute of Technology Warangal, Warangal, India
Search for more papers by this authorAratipamula Bhanuchandar,
Bhagwan K. Murthy,
Corresponding Author
Aratipamula Bhanuchandar
Department of Electrical Engineering, National Institute of Technology Warangal, Warangal, India
Correspondence
Aratipamula Bhanuchandar, Department of Electrical Engineering, National Institute of Technology Warangal, Telangana State, Warangal, 506004, India.
Email: [email protected]
Search for more papers by this authorBhagwan K. Murthy
Department of Electrical Engineering, National Institute of Technology Warangal, Warangal, India
Search for more papers by this authorSummary
This paper proposes a new floor function single carrier-based modulated model predictive current control technique (FF-SC-M2PC2T) by considering conventional nine-level T-type packed U-cell (9L-TPUC) inverter topology. To get desired peak value of load current with low harmonic distortion, the finite control set-based model predictive control technique (FCS-MPCT) has been reported in the literature considering load dynamics and minimization of the cost function. However, inherently it suffers from variable switching frequency (VSF) of operation. To diminish this issue, an M2PC2T has been implemented and it provides a constant switching frequency (CSF) of operation. Especially coming to the modulation stage, most authors generally use level-shifted pulse width modulation (PWM) techniques which inherently require more carriers, if-else conditions, and additional logical gate blocks to generate particular level output. Hence, the control complexity increases as going to higher-level inverter topologies. In this manuscript, a new simple floor function single carrier-based pulse width modulation (FF-SC-PWM) technique has been proposed which applies to any single-phase switched capacitor type multilevel inverter topology and it can be easily integrated with a predictive control algorithm to regulate the inverter output current (IOC). Finally, to check the effectiveness of the proposed control technique (PCT) in a closed loop, a laboratory prototype has been employed on 9L-TPUC inverter topology with different static and dynamic case studies considering RL-Load.
Open Research
DATA AVAILABILITY STATEMENT
Data sharing is not applicable to this article as no new data were created or analyzed in this study.
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