A Novel Hexagonal-Shaped Multilevel Inverter with Reduced Switches for Grid-Integrated Photovoltaic System

Md. Tariqul Islam, Hady H. Fayek, Eugen Rusu and Md. Fayzur Rahman
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Md. Tariqul Islam: Electrical and Electronic Engineering Department, Faculty of Engineering, Green University of Bangladesh, Dhaka 1207, Bangladesh
Hady H. Fayek: Electromechanics Engineering Department, Faculty of Engineering, Heliopolis University, Cairo 11785, Egypt
Eugen Rusu: Department of Mechanical Engineering, Faculty of Engineering, ‘Dunarea de Jos’ University of Galati, Domneasca Street, Galati 800008, Romania
Md. Fayzur Rahman: Electrical and Electronic Engineering Department, Faculty of Engineering, Green University of Bangladesh, Dhaka 1207, Bangladesh

Sustainability, 2021, vol. 13, issue 21, 1-15

Abstract: To date, the grid-connected solar photovoltaic (PV) system has drawn consideration from researchers and academicians due to the speedy improvement and the declining price of solar panels. The proficiency and dependability of a grid integrated PV system rest mainly on the power conversion unit and the proper controlling mechanism. This paper introduces a novel asymmetric hexagonal-shaped fifteen-level inverter designed to feed a grid-integrated solar PV system. First, it aims to reduce the number of components and thereby decrease the installation space and cost of the multilevel inverter. Moreover, it has a low total blocking voltage (TBV) and total device rating (TDR) and uses few switching devices for generating per level of output voltage. The proposed topology utilizes only eight switching devices for generating fifteen levels at the output, which is lower than conventional multilevel inverter topologies. Here, a low-frequency modulation scheme using the half-height (HH) method generates switching pulses to minimize the complexity. The proposed multilevel inverter topology is also validated through the simulations in the MATLAB SIMULINK environment. The proposed inverter need for filters is illustrated according to different grid codes for integrating PV systems to the grid.

Keywords: photovoltaic system; asymmetric; hexagonal-shaped; total blocking voltage; total device rating; half-height method; grid code (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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