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Power Electronics for the Grid Integration of Photovoltaic Systems
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Power Electronics for the Grid Integration of Photovoltaic Systems

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A2: Solar Energy and Photovoltaic Systems".

Deadline for manuscript submissions: closed (31 July 2021) | Viewed by 9551

Special Issue Editor

Dr. Rasoul Shalchi Alishah

E-Mail Website
Guest Editor
Department of Electronic Design (EKS), Mid Sweden University, Holmgatan, 852 30 Sundsvall, Sweden
Interests: power electronics; grid-connected converters; line voltage regulator; leakage current elimination in grid-connected PV arrays; model predictive controller

Special Issue Information

Dear Colleagues,

The Guest Editor is inviting submissions to a Special Issue of Energies on the subject area of “Power Electronics for the Grid Integration of Photovoltaic Systems”. Improving the performance of grid-connected PV system using power electronics is one of the most important targets for researchers. Designing new power electronic topologies with improved parameters such circuit size, manufacturing cost, high-efficiency, reduced voltage on solid-state switches, and high voltage gain is recommended. The design of new modulation techniques for grid-connected inverters, elimination of leakage current in grid-connected PV arrays, MPPT and shading challenges in PV arrays are also very important for improving the performance of grid-connected PV arrays. Moreover, the application of power electronic switches and converters as line voltage regulators (LVR) to keep the voltage profile based on world standards is another challenge in grid-connected inverters.

This Special Issue will deal with novel power electronic topologies, modulation techniques, and different challenges in PV arrays, voltage profile in distribution systems, and so on. Topics of interest for publication include, but are not limited to the following:

  • New power electronic topologies in grid-connected applications (DC-DC converters, DC-AC converters, etc.).
  • Modulation techniques for grid-connected converters (Model predictive controller, Hysteresis controller, etc.).
  • Maximum power point tracking.
  • Leakage current elimination in grid-connected converters.
  • Shading challenge in grid-connected PV arrays.
  • Line voltage regulator in grid-connected PV arrays.
  • Reliability analysis of grid-connected converters.
Dr. Rasoul Shalchi Alishah
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • New power electronic topologies in grid-connected applications (DC-DC converters, DC-AC converters, etc.)
  • Modulation techniques for grid-connected converters (Model predictive controller, Hysteresis controller, etc.)
  • Maximum power point tracking
  • Leakage current elimination in grid-connected converters
  • Shading challenge in grid-connected PV arrays
  • Line voltage regulator in grid-connected applications
  • Reliability analysis of grid-connected converters

Published Papers (4 papers)

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Research

21 pages, 7553 KiB  
Article
A Multilevel Inverter Topology Using Diode Half-Bridge Circuit with Reduced Power Component
by Jagabar Sathik, Shady H. E. Abdel Aleem, Rasoul Shalchi Alishah, Dhafer Almakhles, Kent Bertilsson, Mahajan Sagar Bhaskar, George Fernandez Savier and Karthikeyan Dhandapani
Energies 2021, 14(21), 7249; https://doi.org/10.3390/en14217249 - 3 Nov 2021
Cited by 12 | Viewed by 2242
Abstract
This paper presents a new multilevel converter with a reduced number of power components for medium voltage applications. Both symmetric and asymmetric structures of the presented multilevel converter are proposed. The symmetric topology requires equal dc source values, whereas the asymmetric topology uses [...] Read more.
This paper presents a new multilevel converter with a reduced number of power components for medium voltage applications. Both symmetric and asymmetric structures of the presented multilevel converter are proposed. The symmetric topology requires equal dc source values, whereas the asymmetric topology uses minimum switch count. However, both structures suffer from high blocking voltage across the switches. To reduce the blocking voltage on switches, an optimal topology is presented and analyzed for the selection of the minimum number of switches and dc sources, while maintaining a low blocking voltage across the switches. A comparative analysis with recently published topologies was performed. The simulation results, as well as the comparative analysis, validated the robustness and effectiveness of the proposed topology in terms of the reduced power loss, lowered number of components, and cost. Furthermore, in addition to the simulation results, the performance of the proposed topology was verified using experimental results of 9, 17, and 25 levels. Full article
(This article belongs to the Special Issue Power Electronics for the Grid Integration of Photovoltaic Systems)
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20 pages, 10650 KiB  
Article
Investigation of Adaptive Droop Control Applied to Low-Voltage DC Microgrid
by Prudhvi Kumar Gorijeevaram Reddy, Sattianadan Dasarathan and Vijayakumar Krishnasamy
Energies 2021, 14(17), 5356; https://doi.org/10.3390/en14175356 - 28 Aug 2021
Cited by 10 | Viewed by 2120
Abstract
In a DC microgrid, droop control is the most common and widely used strategy for managing the power flow from sources to loads. Conventional droop control has some limitations such as poor voltage regulation and improper load sharing between converters during unequal source [...] Read more.
In a DC microgrid, droop control is the most common and widely used strategy for managing the power flow from sources to loads. Conventional droop control has some limitations such as poor voltage regulation and improper load sharing between converters during unequal source voltages, different cable resistances, and load variations. This paper addressed the limitations of conventional droop control by proposing a simple adaptive droop control technique. The proposed adaptive droop control method was designed based on mathematical calculations, adjusting the droop parameters accordingly. The primary objective of the proposed adaptive droop controller was to improve the performance of the low-voltage DC microgrid by maintaining proper load sharing, reduced circulating current, and better voltage regulation. The effectiveness of the proposed methodology was verified by conducting simulation and experimental studies. Full article
(This article belongs to the Special Issue Power Electronics for the Grid Integration of Photovoltaic Systems)
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21 pages, 27378 KiB  
Article
Fault Ride Through in Grid Integrated Hybrid System Using FACTS Device and Electric Vehicle Charging Station
by Uthra R. and Suchitra D.
Energies 2021, 14(13), 3828; https://doi.org/10.3390/en14133828 - 25 Jun 2021
Cited by 10 | Viewed by 2056
Abstract
Adopting eco-friendly solutions is the need of the hour in order to downscale carbon emissions and the fast depletion of fossil fuels. Hybrid energy systems provide one such optimistic sustainable solution for power generation in a grid integrated system as well as for [...] Read more.
Adopting eco-friendly solutions is the need of the hour in order to downscale carbon emissions and the fast depletion of fossil fuels. Hybrid energy systems provide one such optimistic sustainable solution for power generation in a grid integrated system as well as for stand-alone applications. With grid integrated systems, there are many grid codes to be maintained such as voltage stability, frequency deviation and Fault Ride Through Capability (FRT). In a hybrid system, the propensity of the PV/Wind system to remain connected at the moment of short electric fault is identified as FRT. This paper elucidates the voltage compensation using an Electric Vehicle (EV) charging station or a Flexible AC Transmission System (FACTS) device depending on the intensity of fault that occurs at the Point of Common Coupling (PCC) in grid integrated hybrid systems. When a fault occurs at the PCC, depending on the intensity of the voltage sag either the EV charging station or a FACTS device, namely a Dynamic Voltage Restore (DVR), provides the voltage compensation. The voltage obtained from an EV charging station or DVR is conditioned using power converters and fed to the PCC to even out the discrepancy in the voltage that is effected due to the fault. Even though charges electric vehicles continuously, the EV charging station gives priority to supply voltage for compensation whenever a fault occurs at the grid. If the intensity of voltage sag due to fault is between 0.9 to 0.51 p.u, the EV charging station provides voltage compensation, and for voltage sag between 0.5 to 0.2 p.u, DVR takes over to provide voltage compensation for the continuous sustainability of the grid. The proposed system makes use of an existing source such as an EV charging station as a supplementary device to provide compensation, and also has a backup supplementary device DVR in case of any non-availability of the EV charging station. Thus, the voltage compensation in turn facilitates the parameters such as DC link voltage and the grid voltage to stay within the pertinent limits in the event of a fault at the grid. The system was simulated using MATLAB Simulink and the results were verified. Full article
(This article belongs to the Special Issue Power Electronics for the Grid Integration of Photovoltaic Systems)
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18 pages, 10356 KiB  
Article
A Limited Common-Mode Current Switched-Capacitor Multilevel Inverter Topology and Its Performance and Lifetime Evaluation in Grid-Connected Photovoltaic Applications
by Hossein Khoun Jahan, Reyhaneh Eskandari, Tohid Rahimi, Rasoul Shalchi Alishah, Lei Ding, Kent Bertilsson, Mehran Sabahi and Frede Blaabjerg
Energies 2021, 14(7), 1915; https://doi.org/10.3390/en14071915 - 30 Mar 2021
Cited by 15 | Viewed by 2289
Abstract
In this paper, a switched-capacitor multilevel inverter with voltage boosting and common-mode-voltage reduction capabilities is put forth. The proposed inverter is synthesized with one-half bridge and several switched-capacitor cells. Due to the voltage boosting and common-mode current reduction features, the proposed multilevel inverter [...] Read more.
In this paper, a switched-capacitor multilevel inverter with voltage boosting and common-mode-voltage reduction capabilities is put forth. The proposed inverter is synthesized with one-half bridge and several switched-capacitor cells. Due to the voltage boosting and common-mode current reduction features, the proposed multilevel inverter is suitable for grid-connected PV applications. In addition, an analytical lifetime evaluation based on mission profile of the proposed inverter has been presented to derive lifetime distribution of semiconductors. Whereas in the proposed inverter, any components failure can bring the whole system to a shutdown. The series reliability model is used to estimate the lifetime of the overall system. The performance of the suggested multilevel inverter in grid-connected applications is verified through the simulation results using the grid-tied model in Matlab/Simulink. Moreover, the viability and feasibility of the presented inverter are proven by using a one kW lab-scaled prototype. Full article
(This article belongs to the Special Issue Power Electronics for the Grid Integration of Photovoltaic Systems)
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