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Power Electronic Applications to Electric Vehicles, Renewable Energy Sources and Energy Savings

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "F3: Power Electronics".

Deadline for manuscript submissions: closed (31 March 2022) | Viewed by 21360

Special Issue Editors


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Guest Editor
Department of Electrical and Computer Engineering, Democritus University of Thrace, 67132 Xanthi, Greece
Interests: power electronics; renewable energy sources; sustainable energy; (smart) microgrids; electrical transportation; energy saving; power quality
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Guest Editor
Environmental Physics, Energy and Environmental Biology Laboratory, Department of Environment, Ionian University, 29100 Panagoula-Zakynthos, Greece
Interests: power electronics applications for RES exploitation; electrification of land transportation; energy saving and power quality improvement; microgrids and smart grids; nZEB and ZEB smart buildings, all-electric and hybrid shipboards
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

As power electronics technology matures, its applications become essential to the transition towards greener, smarter, and sustainable development. In this context, recent advances in power electronics have contributed to the optimization of energy saving in all main industrial and social sectors (all-electric transportations, smart city concepts, renewable energy exploitation, energy saving applications, etc.). The aim of the present Special Issue is to attract original high-quality papers and review articles proposing advances in power electronics for electric vehicles, renewable energy sources, and energy savings. Major topics include but are not limited to the following:

  • New materials and methods for energy saving;
  • Efficient public transportation systems; all-electric vehicles, aircrafts, trains, and ships, electric vehicle charging strategies and techniques, and vehicle-to-grid (V2G);
  • (Smart) microgrids; grid-tied/standalone solutions, energy management;
  • Smart city concepts;
  • Energy harvesting for smart applications, wireless power transfer for distributed energy sources;
  • Dynamic features of power electronics interfaced energy saving applications;
  • Flexible and wide-band performance control schemes for energy saving applications;
  • Power electronic concepts for thermoelectric applications; heat recovery systems;
  • Power electronic systems for smart buildings and NZEBs;
  • Renewable energy conversion systems; design, modelling, control, and integration to modern power systems
  • Energy storage; batteries, fuel cells, supercapacitors, flywheels, and new trends and concepts.

Dr. Nick Papanikolaou
Dr. Anastasios Kyritsis
Guest Editors

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Keywords

  • Power electronics
  • Energy saving
  • Renewable energy sources
  • Sustainable energy
  • Microgrids
  • Smart city concept
  • Electrical transportation
  • Electric vehicles
  • Power quality
  • Energy harvesting
  • Energy storage
  • Heat recovery
  • Thermoelectric applications

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Published Papers (6 papers)

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Research

20 pages, 9334 KiB  
Article
Torque Improvement of Six-Phase Permanent-Magnet Synchronous Machine Drive with Fifth-Harmonic Current Injection for Electric Vehicles
by Donghan Yun, Namhun Kim, Daeil Hyun and Jeihoon Baek
Energies 2022, 15(9), 3122; https://doi.org/10.3390/en15093122 - 25 Apr 2022
Cited by 2 | Viewed by 2444
Abstract
This paper proposes a method to improve the output torque of a six-phase permanent-magnet synchronous machine (PMSM) within the same current peak limit through a fifth-harmonic injection into each phase current of the stator. Compared to the fifth + seventh-harmonic current-injection method used [...] Read more.
This paper proposes a method to improve the output torque of a six-phase permanent-magnet synchronous machine (PMSM) within the same current peak limit through a fifth-harmonic injection into each phase current of the stator. Compared to the fifth + seventh-harmonic current-injection method used to improve the output torque of the six-phase PMSM, the control system can be stably controlled, and the controller design complexity decreased. This is because the harmonic component was converted into a direct current (DC) component and controlled by a proportional-integral (PI) controller instead of the fifth + seventh-harmonic injection method, which converts the harmonic component into an alternating current (AC) component and controls it with a resonance controller. The appropriate fifth-harmonic ratio for maximum output torque through fifth-harmonic injection was selected through optimization using values analyzed via fast Fourier transform (FFT) for stator phase harmonic current terms caused by inverter nonlinearity and motor design errors. Therefore, it was possible to optimize the fifth-harmonic ratio to be injected without requiring torque modeling using the physical properties of the motor. The experimental results were obtained under the rated current condition with six-phase PMSM in the laboratory, and the average output torque increase under fifth-harmonic injection was about 5% compared to the method without harmonic injection. Full article
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16 pages, 3983 KiB  
Article
Behavioral Analysis of Potential Induced Degradation on Photovoltaic Cells, Regeneration and Artificial Creation
by Alex Mirtchev, Theodoros Mouselinos, Stylianos Syrigos and Emmanuel Tatakis
Energies 2021, 14(13), 3899; https://doi.org/10.3390/en14133899 - 29 Jun 2021
Cited by 6 | Viewed by 1888
Abstract
Many photovoltaic (PV) parks suffer from a decrement in their generated power capability due to a phenomenon called potential induced degradation (PID). In this paper, a regenerative system using a high step-up DC–DC converter is proposed, for regenerating PV cells that have been [...] Read more.
Many photovoltaic (PV) parks suffer from a decrement in their generated power capability due to a phenomenon called potential induced degradation (PID). In this paper, a regenerative system using a high step-up DC–DC converter is proposed, for regenerating PV cells that have been degraded due to the PID effect. The same device also can be used for artificially creating PID on PV panels in order to study the effects of the PID under controlled conditions. The power converter offers multiple voltage levels at the output to adapt to various voltage ratings of PV parks. The device has plug-and-play features, ultra-low cost, small size and is simple in operation. Experimental tests are conducted in real PV panels and comparative results verify the operational principles of the proposed system. The artificial creation of the PID phenomenon and the regeneration of the PV cells are successfully proven experimentally. Full article
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23 pages, 7617 KiB  
Article
Voltage Transients Mitigation in the DC Distribution Network of More/All Electric Aircrafts
by Nick Rigogiannis, Dionisis Voglitsis, Tiago Jappe and Nick Papanikolaou
Energies 2020, 13(16), 4123; https://doi.org/10.3390/en13164123 - 10 Aug 2020
Cited by 16 | Viewed by 2936
Abstract
The objective of this paper is to present a power conversion system, based on a bidirectional DC/DC converter, along with a supercapacitor bank, that mitigates the voltage transients that occur on the DC distribution network of More/All Electric Aircrafts. These transients, such as [...] Read more.
The objective of this paper is to present a power conversion system, based on a bidirectional DC/DC converter, along with a supercapacitor bank, that mitigates the voltage transients that occur on the DC distribution network of More/All Electric Aircrafts. These transients, such as voltage sags and swells appear on the DC buses of on-board microgrids, mainly due to load variations and are classified according to the aircrafts electric power system standards. First, we shortly describe an aircraft distribution network, that is applicable to the most common actual aircraft architectures, then we present the proposed system, along with the bidirectional DC/DC converter design, the control technique and the supercapacitor bank sizing. Finally, we present simulation and experimental results that support the effectiveness of the proposed system to effectively compensate voltage transients, supporting the DC buses in dynamic conditions. Concluding, the proposed system provides high power quality and compliance with the respective power quality standards for aircraft microgrids. Full article
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18 pages, 6954 KiB  
Article
Phase-Shift PWM-Controlled DC–DC Converter with Secondary-Side Current Doubler Rectifier for On-Board Charger Application
by Khairy Sayed, Ziad M. Ali and Mujahed Aldhaifallah
Energies 2020, 13(9), 2298; https://doi.org/10.3390/en13092298 - 6 May 2020
Cited by 20 | Viewed by 4421
Abstract
A novel circuit topology for an on-board battery charger for plugged-in electric vehicles (PEVs) is presented in this paper. The proposed on-board battery charger is composed of three H-bridges on the primary side, a high-frequency transformer (HFT), and a current doubler circuit on [...] Read more.
A novel circuit topology for an on-board battery charger for plugged-in electric vehicles (PEVs) is presented in this paper. The proposed on-board battery charger is composed of three H-bridges on the primary side, a high-frequency transformer (HFT), and a current doubler circuit on the secondary side of the HFT. As part of an electric vehicle (EV) on-board charger, it is required to have a highly compact and efficient, lightweight, and isolated direct current (DC)–DC converter to enable battery charging through voltage/current regulation. In this work, performance characteristics of full-bridge phase-shift topology are analyzed and compared for EV charging applications. The current doubler with synchronous rectification topology is chosen due to its wider-range soft-switching availability over the full load range, and potential for a smaller and more compact size. The design employs a phase-shift full-bridge topology in the primary power stage. The current doubler with synchronous recitation is placed on the secondary. Over 92% of efficiency is achieved on the isolated charger. Design considerations for optimized zero-voltage transition are disused. Full article
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21 pages, 2313 KiB  
Article
Providing Ancillary Services with Wind Turbine Generators Based on DFIG with a Two-Branch Static Converter
by Ernande Eugenio C. Morais, Francisco Kleber de A. Lima, Jean M. L. Fonseca, Carlos G. C. Branco and Lívia de A. Machado
Energies 2019, 12(13), 2490; https://doi.org/10.3390/en12132490 - 28 Jun 2019
Cited by 3 | Viewed by 2537
Abstract
This work aims to analyze and validate through mathematical modeling and experimental results, in a three-phase three-wire electrical system, the technical viability of a static power converter with a two-level topology with only two controlled branches (2L2B), operating as a grid-side converter (GSC) [...] Read more.
This work aims to analyze and validate through mathematical modeling and experimental results, in a three-phase three-wire electrical system, the technical viability of a static power converter with a two-level topology with only two controlled branches (2L2B), operating as a grid-side converter (GSC) in a wind turbine generator based on a doubly fed induction generator (DFIG). With this reduced-switches topology, the GSC is able to regulate the DC-link voltage level from the generator back-to-back converter and provide ancillary services of harmonic filtering and reactive power compensation from linear/nonlinear loads connected to the point of common coupling. An 8-kVA experimental prototype was implemented in the laboratory to validate the proposal. The prototype control system was realized using the dSPACE DS1103 PPC Controller Board platform programmed via MATLAB/Simulink. The effectiveness of the proposed system is verified by comparing the results obtained with the 2L2B topology to the ones with the usual two-level three-branch topology. Full article
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25 pages, 7501 KiB  
Article
Dynamic Modeling of Wind Turbines Based on Estimated Wind Speed under Turbulent Conditions
by Ahmed G. Abo-Khalil, Saeed Alyami, Khairy Sayed and Ayman Alhejji
Energies 2019, 12(10), 1907; https://doi.org/10.3390/en12101907 - 18 May 2019
Cited by 35 | Viewed by 5697
Abstract
Large-scale wind turbines with a large blade radius rotates under fluctuating conditions depending on the blade position. The wind speed is maximum in the highest point when the blade in the upward position and minimum in the lowest point when the blade in [...] Read more.
Large-scale wind turbines with a large blade radius rotates under fluctuating conditions depending on the blade position. The wind speed is maximum in the highest point when the blade in the upward position and minimum in the lowest point when the blade in the downward position. The spatial distribution of wind speed, which is known as the wind shear, leads to periodic fluctuations in the turbine rotor, which causes fluctuations in the generator output voltage and power. In addition, the turbine torque is affected by other factors such as tower shadow and turbine inertia. The space between the blade and tower, the tower diameter, and the blade diameter are very critical design factors that should be considered to reduce the output power fluctuations of a wind turbine generator. To model realistic characteristics while considering the critical factors of a wind turbine system, a wind turbine model is implemented using a squirrel-cage induction motor. Since the wind speed is the most important factor in modeling the aerodynamics of wind turbine, an accurate measurement or estimation is essential to have a valid model. This paper estimates the average wind speed, instead of measuring, from the generator power and rotating speed and models the turbine’s aerodynamics, including tower shadow and wind shear components, without having to measure the wind speed at any height. The proposed algorithm overcomes the errors of measuring wind speed in single or multiple locations by estimating the wind speed with estimation error less than 2%. Full article
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