Journal
IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS
Volume 10, Issue 1, Pages 399-407Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TII.2013.2280083
Keywords
Cascade multilevel inverter (CMI); photovoltaic (PV) power system; quasi-Z-source inverter; space vector modulation (SVM)
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Funding
- Qatar National Research Fund, Qatar Foundation [NPRP-EP X-033-2-007]
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An effective control method, including system-level control and pulsewidth modulation for quasi-Z-source cascade multilevel inverter (qZS-CMI) based grid-tie photovoltaic (PV) power system is proposed. The system-level control achieves the grid-tie current injection, independent maximum power point tracking (MPPT) for separate PV panels, and dc-link voltage balance for all quasi-Z-source H-bridge inverter (qZS-HBI) modules. The complete design process is disclosed. A multilevel space vector modulation (SVM) for the single-phase qZS-CMI is proposed to fulfill the synthetization of the step-like voltage waveforms. Simulation and experiment based on a seven-level prototype are carried out to validate the proposed methods.
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