Journal
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
Volume 68, Issue 8, Pages 6992-7001Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIE.2020.3003627
Keywords
Switches; Voltage control; Inverters; Topology; Capacitors; Predictive control; Finite-set model predictive control (FS-MPC); grid-connected multilevel inverter; multilevel switching-mode operation; nine-level packed E-cell (PEC9)
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Funding
- Agence Universitaire de la Francophonie
- Lebanese National Council for Scientific Research (CNRS-L)
- Research Council of Saint-Joseph University
- Canadian Research Chair in Electric Energy Conversion and Power Electronics
- Natural Sciences and Engineering Research Council of Canada
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In this article, a modified finite-set model predictive control (M-FS-MPC) for grid-connected nine-level PEC9 inverter is proposed, enabling switching among different multilevel voltages while ensuring low THD, desired current injection, and power factor for grid connectivity. The experimental results confirm the performance and robustness of M-FS-MPC in meeting the requirements of PEC multilevel switching-mode operation and grid connectivity in steady and transient states.
In this article, we propose a modified finite-set model predictive control (M-FS-MPC) for multilevel switching-mode operation of grid-connected nine-level packed E-cell (PEC9) inverter. With a single-dc source, six power switches, back-to-back-connected switches as bidirectional and two capacitors horizontally extended, PEC9 inverter topology has remarkably reduced the components count. Packed E-cell (PEC) prominent feature has the capability of switching among different multilevel voltages: nine-, seven-, or five-level under faulty switch cases without any structural modification and only if the controller is appropriately designed. M-FS-MPC is proposed to operate the grid-connected PEC with the multilevel switching mode under bidirectional switch fault operation. Switching among five-, seven-, or nine-level voltages is attained by proper dc capacitors' voltages regulation, whereas the desired current injection with low total harmonic distortion (THD) and requested power factor for addressing grid connectivity applications is guaranteed. The system discrete model is developed and the experimental results verify the performance and robustness of M-FS-MPC in targeting the capability of PEC multilevel switching-mode operation and grid connectivity requirements in both steady and transient states.
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