A review of grid connection performance of solar cells for a threephase structure of a 7-level cascaded inverter

Document Type : Comprehensive review article

Authors

1 Electrical Department, Faculty of Technology and Education, Sohag University

2 Master's student at Sohag University

3 Department of Electrical Engineering, Faculty of Engineering, South Valley University

Abstract

 Nowadays, solar energy has become a competitive option for power generation in self-sufficient systems that
may be used in both urban and rural electrification settings. High-quality alternating current output is required from the
power electronic converters used in the conversion process in order to guarantee a voltage waveform that closely mimics a
sinusoidal form. To get a high-quality output, the inverter's architecture and the pulse width modulation (PWM) technology
it uses are essential factors. With a wide variety of industrial applications, the multilevel inverter has emerged as a major
field of study in recent decades. Multilevel inverters (MLIs) are used to enhance output waveform characteristics (e.g.,
lower total harmonic distortion) and to offer a variety of inverter configurations and modulation methods. As a result, MLIs
have attracted more attention from scholars in comparison to their two-level equivalents, attributable to their capacity to
deliver reduced electromagnetic interference (EMI), enhanced efficiency, and elevated direct current connection voltages.
The Cascaded H-bridge (CHB) inverter was discovered in fact more reliable, easier to build, and performing Impressively
among many multilevel inverter configurations. It is the best option for energy transformation in a wide range of industrial
applications because of its exceptional qualities, which include great adaptability and durability against defects. This
operating efficiency for a three-phase, 7-level CHB inverter was thoroughly investigated at this work. Phase Shifted Pulse
Width Modulation (PSPWM) methodology was employed at simulation to assess inverter performance. The three-phase, 7-
level CHB inverter was the particular application for this PSPWM technology. MATLAB/SIMULINK software was
employed at produce simulator conclusions. The thorough simulation and performance evaluation of a three-phase, sevenlevel CHB Multilevel Inverter using PSPWM in compliance with real-world operating conditions is what makes this work
unique. As opposed to previous studies that primarily focus on generic CHB inverter designs, this paper carefully examines
the complex application and performance metrics of PSPWM in a multi-phase system, clarifying issues regarding harmonic
distortion properties, voltage waveform integrity, and modulation effectiveness. The suggested inverter is perfect for
integration with renewable energy grids because simulations showed that it had better output waveform, reduced power
losses, lower harmonic distortions, and superior voltage quality.

Keywords

Journal of Sustainable Food, Water, Energy and Environment
Volume 1, Issue 2 - Serial Number 2
October 2025
Pages 62-73

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