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Recent Trends on Grid-tied Multilevel Inverters for Renewable Energy Systems

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A1: Smart Grids and Microgrids".

Deadline for manuscript submissions: closed (31 October 2022) | Viewed by 11413

Special Issue Editors


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Guest Editor
Department of EEE, School of Electrical & Electronics Engineering, SASTRA Deemed University, Thanjavur 613401, India
Interests: power electronics; photovoltaic system; inverter; DC-DC power converter; solar energy; renewable energy; microgrid

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Guest Editor
School of Electrical and Electronic Engineering, Universiti Sains Malaysia, Nibong Tebal 14300, Penang, Malaysia
Interests: energy conversion; converters for electric vehicle; bidirectional converter; control of power electronic systems

Special Issue Information

Dear Colleagues,

The integration of renewable energy sources (solar and wind) with the grid plays an important role in energy utilization. It is difficult to utilize electricity from renewable energy sources directly or to inject renewable energy power into the grid. Hence, the system needs power electronic converters as an interface between renewable energy sources and grid/load. Recently, multilevel inverters (MLI) have become more suitable for interfacing. As compared with two-level inverters, MLIs have multiple advantages such as lower electromagnetic interference, less harmonic distortion, lower voltage stress on semiconductor elements, and higher efficiency. The recent trends in MLIs mainly focus on a reduction in the switch count/DC supplies to make the compact design and utilization of advanced pulse width modulation techniques for producing quality output voltage waveform.

This Special Issue is intended to motivate further research and the development of multilevel inverters, refreshing the state of the art, pointing out the benefits, and investigating novel modulation schemes for grid-connected renewable energy applications. The topics of interest for publication include but are not limited to:

  1. Multilevel inverters for renewable energy applications (photovoltaic, wind energy, and fuel-cells).
  2. Multilevel converters for high-power electric vehicle battery chargers.
  3. Fault-tolerant multilevel converters.
  4. Multilevel inverter (MLI) with reduced devices, for low/medium- and high-voltage application.
  5. Advanced pulse width modulation techniques for MLI.
  6. Developing MLI topology with self-balancing capability.
  7. Control of a grid-tied multilevel inverter interfacing.

Dr. Prabaharan Nataraj
Dr. Mohamed Salem
Guest Editors

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Keywords

  • multilevel inverters for distributed generation (solar, wind, etc)
  • pulse-width-modulated multilevel inverters
  • multiphase multilevel inverter topologies and modulation strategies
  • grid-tied multilevel inverters
  • the self-balancing capacitor in the multilevel inverter
  • multilevel matrix converters

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Published Papers (3 papers)

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Research

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26 pages, 12648 KiB  
Article
Circulating Current Control of Phase-Shifted Carrier-Based Modular Multilevel Converter Fed by Fuel Cell Employing Fuzzy Logic Control Technique
by Murthy Priya and Pathipooranam Ponnambalam
Energies 2022, 15(16), 6008; https://doi.org/10.3390/en15166008 - 19 Aug 2022
Cited by 7 | Viewed by 2384
Abstract
The contribution of the modular multilevel converter (MMC) in integrating non-conventional energy sources into the grid is significant; the integration of fuel cells with distributed energy sources is especially prominent as they provide a constant voltage and current for constant load applications. Still, [...] Read more.
The contribution of the modular multilevel converter (MMC) in integrating non-conventional energy sources into the grid is significant; the integration of fuel cells with distributed energy sources is especially prominent as they provide a constant voltage and current for constant load applications. Still, there is a high demand for a high-quality power conditioning unit since there is an occurrence of frequent power spikes. Further, the circulating current (CC) in phase legs is an inherent phenomenon of MMC that must be mitigated. Hence, this article proposed an MMC incorporating a fuzzy logic controller (FLC)-based technique to control the circulating currents. The fuzzy controller effectively reduced the harmonics of the CC in the dc-link system. In addition, phase-shifted carrier (PSC) modulation was employed for the MMC to improve the capacitor voltage balancing to maintain the constant input voltage. Moreover, a mathematical analysis of PSC modulation for MMC was performed to identify the PWM harmonic characteristics of the output voltage and the CC. The performance analysis of the proposed system was tested using the hardware in loop (HIL) simulation with the help of the real-time simulator OP-5700 to verify the feasibility. Full article
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27 pages, 5763 KiB  
Article
Design and Validation of a SEPIC-Based Novel Multi-Input DC-DC Converter for Grid-Independent Hybrid Electric Vehicles
by Saikumar Bairabathina and Balamurugan S
Energies 2022, 15(15), 5663; https://doi.org/10.3390/en15155663 - 4 Aug 2022
Cited by 11 | Viewed by 2597
Abstract
The multi-input converters play a significant role in developing grid-independent hybrid electric vehicles (GIHEVs). This article describes the design and analysis of a single-ended primary-inductor converter (SEPIC)-based novel multi-input DC-DC converter (MIC) for grid-independent hybrid electric vehicles (GIHEVs) that is powered by a [...] Read more.
The multi-input converters play a significant role in developing grid-independent hybrid electric vehicles (GIHEVs). This article describes the design and analysis of a single-ended primary-inductor converter (SEPIC)-based novel multi-input DC-DC converter (MIC) for grid-independent hybrid electric vehicles (GIHEVs) that is powered by a solar photovoltaic (PV) panel and a fuel cell. The average large-signal, small-signal, and steady-state modelings are demonstrated to achieve high-quality design and analysis. The proposed converter promises wide output voltage and power flow management at lower duty cycle values. The sources can transfer energy to the load either jointly or individually in this converter with the appropriate operation of the power switches. A hardware prototype is also developed and tested efficiently to uphold the mathematical modeling, design, and operation. With fewer switches, lower voltage stress, and fewer circuit components, the suggested converter claims better gain and higher (96%) efficiency. Full article
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Review

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40 pages, 10713 KiB  
Review
A Comprehensive Review on Multilevel Inverters for Grid-Tied System Applications
by Mohamed Salem, Anna Richelli, Khalid Yahya, Muhammad Najwan Hamidi, Tze-Zhang Ang and Ibrahim Alhamrouni
Energies 2022, 15(17), 6315; https://doi.org/10.3390/en15176315 - 29 Aug 2022
Cited by 28 | Viewed by 5320
Abstract
Multi-level inverters (MLIs) have been widely used in recent years due to their various advantages in industrial and grid-connected applications. Traditional MLI topologies are being hampered by the rapid surge of renewable energy systems (RES) as a result of performance difficulties such as [...] Read more.
Multi-level inverters (MLIs) have been widely used in recent years due to their various advantages in industrial and grid-connected applications. Traditional MLI topologies are being hampered by the rapid surge of renewable energy systems (RES) as a result of performance difficulties such as poor power reliability, an economically unviable structure, and a lack of efficiency. These difficulties are due to the traditional MLI topologies’ inability to keep up with the increasing demand for RES. Because of concerns about performance and limitations posed by classic MLI topologies, researchers have found themselves driven to the idea of building innovative hybrid MLI topologies. This study provides a comprehensive analysis of multilevel inverter systems that are wired into the main power supply. Grid-connected inverter types and their configurations are discussed in depth in this review. Diverse multi-level inverter topologies, as well as the different approaches, are divided into various categories and discussed in depth. Additionally, a number of control reference frames for inverters were brought forward for discussion. Furthermore, different inverter control strategies were investigated, followed by a tabular summary of recent developments in the inverter-related literature for the convenience of the readers. Moreover, the recently proposed grid-connected multi-level inverter systems were discussed including their findings and innovations. In conclusion, a brief description of the study’s scope was offered and research directions for future studies were provided. Full article
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