Investigation of Quasi Z-Source Cascaded Multilevel Inverter for PV System with Maximum Power Point Tracking

Abstract:

This paper investigates the quasi Z-source cascaded multilevel inverter for a photovoltaic system with maximum power point tracking. The main advantage of quasi z-source configuration is that it has boost characteristics and inversion capability in a single stage avoiding complexity of having a number of converter stages thereby increasing the efficiency. Also it has continuous input characteristic which makes it best suitable for PV applications. Perturb and Observe (P&O) algorithm has been chosen for tracking the maximum power point of the PV source. Five level cascaded inverter with quasi - impedance network powered by PV sources has been considered in this paper. Maximum constant boost control technique has been implemented for controlling the shoot-through period of the inverter. Simulation of the proposed topology has been carried out in Matlab/Simulink and performance parameters have been calculated and the results are verified.

• Periodical: Applied Mechanics and Materials (Volume 622)
• Pages: 105-110
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.622.105
• Online since: August 2014
• Authors: Devaraj Umarani*, R. Seyezhai
• Keywords: Constant Boost, Maximum Power Point Tracking (MPPT), Observe, Perturb, Photovoltaic Source, Quasi Z-Source Network

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