Modeling, Simulation and Harmonic Reduction of Three-Phase Multilevel Cascaded Inverters with SVPWM for Photovoltaic System

M. Valan Rajkumar(1*), P. S. Manoharan(2)

(1) Department of Electrical and Electronics Engineering, SSM Institute of Engineering and Technology, Dindigul, India
(2) Department of Electrical and Electronics Engineering, Thiagarajar College of Engineering, Madurai, India
(*) Corresponding author

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This paper presents a control for a three-phase an eleven-level cascaded H-bridge inverter for photovoltaic (PV) system. The maximum power point tracking (MPPT) is capable of extracting maximum power from the PV array connected to each DC link voltage level. The MPPT algorithm is solved by fuzzy logic controller. Space vector pulse width modulation (SVPWM) algorithm uses a simple mapping to generate gate signals for the inverter. This is done to achieve high dynamic performance with low total harmonic distortion (THD). The validity of the system is verified through MATLAB/Simulink and results are compared with three-phase three-level, five-level, seven-level and nine-level cascaded H-bridge inverter for PV system in terms of THD. Finally, simulation results are presented to verify the effectiveness and accuracy of the proposed system.
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Photovoltaic (PV) System; Cascaded H-Bridge Multilevel Inverter, Space Vector Pulse Width Modulation (SVPWM); Fuzzy MPPT; Total Harmonic Distortion (THD)

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