Article
Computer Science, Information Systems
Yansheng Huang, Shuting Lin, Haijun Mo
Summary: This study proposes methods to solve the energy supply problems in the charging system of new energy electric vehicles. By studying the topology equivalent circuit diagram and control algorithm of three-level AC/DC and three-level bidirectional DC/DC converters, it achieves control over current and voltage, and proposes a phase shift modulation method for intelligent control. Experimental results show that the converters used have good performance and provide reliable technical support for the photovoltaic charging station technology of modern new energy electric vehicles.
Article
Engineering, Electrical & Electronic
Sanghun Kim, Honnyong Cha, Heung-Geun Kim
Summary: This paper discusses the research on high-power charging stations due to the proliferation of electric vehicles, and proposes a new type of voltage balancer with dc-dc converter function. Compared to traditional VB, this new type of VB has lower voltage and current stresses, higher conversion ratio and efficiency, and no limitations on the VBC range.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Mohd Rizwan Khalid, Mohammad Saad Alam, Mahesh Krishnamurthy, Essam A. Al-Ammar, Hasan Alrajhi, M. Syed Jamil Asghar
Summary: This study presents a multiphase ac-dc converter-based electric vehicle charging station that meets the IEEE-519 power-quality standard. The proposed charging station achieves low total harmonic distortion and high power factor by drawing current from the utility grid without the need for PF corrector and active/passive filter circuits.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2022)
Article
Computer Science, Information Systems
Md. Rezanul Haque, K. M. A. Salam, Md. Abdur Razzak
Summary: This paper presents a modified PI controller-based DC-DC converter for efficient and reliable charging of lithium-ion battery systems in electric vehicles. The proposed converter minimizes power loss and junction temperature, thereby improving the converter's lifespan. Through analysis, it is shown that the converter maintains a high power factor and low harmonic distortion, making it suitable for high-density load currents. A hardware prototype has been implemented to validate its applicability in EV battery charging.
Article
Engineering, Electrical & Electronic
A. Muthuram Kumar, P. Subha Karuvelam
Summary: The insufficiency and soaring rate of fossil fuels, as well as growing concerns about global warming, have driven the adoption of electric vehicles (EVs), leading to the need for widespread charging stations. A Photovoltaic (PV) based EV charging system is adopted because power generation from PV is possible everywhere. This research work constructs an EV charging system with two converters: a re-lift Luo converter and a Dual Active Bridge (DAB) converter. The re-lift Luo converter converts low PV voltage output to an enhanced higher-level voltage, while the DAB converter provides galvanic isolation and bidirectional power flow.
JOURNAL OF ELECTRICAL ENGINEERING & TECHNOLOGY
(2023)
Article
Energy & Fuels
Dominic Savio Abraham, Balaji Chandrasekar, Narayanamoorthi Rajamanickam, Pradeep Vishnuram, Venkatesan Ramakrishnan, Mohit Bajaj, Marian Piecha, Vojtech Blazek, Lukas Prokop
Summary: This study proposes a grid-connected photovoltaic-powered EV charging station with converter control technique to address the issues of managing available grid power and bus voltage regulation. The bidirectional converter with fuzzy logic controller provides regulated output during charging and discharging, and fuzzy control is used to maintain a decentralized power distribution. The effectiveness of the proposed controller is validated through MATLAB simulations and experimental results under various microgrid situations.
Article
Automation & Control Systems
Yuxuan Bi, Chao Wu, Tong Zhao, Houji Li, Junzhong Xu, Guohua Shu, Yong Wang
Summary: This article proposes a modified deadbeat predictive current control (DPCC) method to improve the current control performance of the single-phase ac-dc power factor correction (PFC) converter. By introducing a phase adjustment parameter and adding reactive power compensation, the control method achieves higher performance.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Automation & Control Systems
N. J. Merlin Mary, Shelas Sathyan, Hiralal Muralidhar Suryawanshi
Summary: A three-level modified series-parallel bidirectional isolated dc-dc resonant converter (TL-MSPBRC) is proposed for EV battery charging. The converter's performance is enhanced by considering the parasitics in the transformer and using the first-harmonic approximation (FHA) equivalent circuit model. It has high efficiency, soft-switching capability, and minimized conduction losses. A 3.3-kW prototype with a battery voltage range of 230-300-V is developed to validate the design method and achieves an excellent efficiency of 97.7%.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Energy & Fuels
Minfa Huang, Hong Shen, Juanjuan Peng, Lu Zhang
Summary: Realizing fault recovery in an AC/DC hybrid distribution network through the advantages of DC network is highly effective. Power transfer can be achieved in space and time by coordinating voltage source converter (VSC), network reconfiguration, and electric vehicle charging station (EVCS). The faults in the AC/DC hybrid distribution network are divided into five types based on their locations and the connection characteristics between outage areas and power supply. A mixed integer programming model is established to optimize the recovery process, considering the minimum weighted outage power of loads. The proposed strategy significantly reduces the total weighted outage loads compared to only using VSCs and reconfiguration.
Article
Automation & Control Systems
Andre Elias Lucena da Costa, Cursino Brandao Jacobina, Nady Rocha, Edison Roberto Cabral da Silva, Antonio Venancio de Moura Lacerda Filho
Summary: This article presents a single-phase AC-DC-AC unidirectional three-level three-leg converter, which allows feeding the load voltage with a sinusoidal voltage with constant amplitude and frequency. The proposed converter retains the advantages of T-type leg with lower conduction losses and better power quality, making it suitable for low-medium voltage applications. The space-vector pulsewidth modulation technique is employed to reduce switching losses and ensure five-level multilevel voltages at both the grid and load sides.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Computer Science, Information Systems
Jannik Schaefer, Johann Walter Kolar
Summary: This paper presents an isolated three-port DC/DC converter topology for energy distribution grid of electric vehicles, with simplicity in control and circuit complexity, achieving high efficiency and power density for charging EVs.
Article
Engineering, Electrical & Electronic
Suhua Luo, Fengjiang Wu, Guizhong Wang
Summary: In this article, a novel topology with a three-level half-bridge matrix converter and a resonant tank is proposed to improve the current characteristics of the single-stage dual active bridge type isolated ac-dc converter. The operation principle and steady-state characteristics are analyzed based on PWM plus phase shift modulation. The proposed converter reduces voltage stress and current stress on power switches, and is valuable in medium-voltage applications for high-frequency power conversion. Detailed experimental results verify the correctness and feasibility of the proposed topology and theoretical analysis.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2022)
Article
Engineering, Electrical & Electronic
Xiang Li, Julu Sun, Liuniu Guo, Mingzhi Gao, Haibing Hu, Ming Xu
Summary: This article proposes a three-phase single-stage ac/dc converter based on Swiss rectifier and three-level LLC topology, integrating the advantages of high-efficiency Swiss rectifier and LLC resonant tank for soft switching. It employs a frequency modulation and duty cycle control strategy to regulate the output voltage and achieve three-phase power factor correction. The proposed converter's detailed operation principles, steady-state characteristics, and design considerations are provided, along with an experimental prototype to verify its effectiveness and feasibility.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Multidisciplinary
Vandana Jain, Seema Kewat, Bhim Singh
Summary: This paper presents a three-phase grid interfaced charging station for electric vehicles. The charging station interacts with the grid to compensate for reactive power and operates in various modes including charging/discharging of EV battery, compensation of reactive power, concurrent charging and compensation of harmonics current, and concurrent discharging and compensation of harmonics current. The control of the charging station ensures synchronization between reference grid currents and phase voltages at PCC. The performance of the charging station was tested under various dynamic conditions and the grid currents distortion levels were within the limits recommended by the standard IEEE-519.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2023)
Article
Engineering, Electrical & Electronic
J. C. Vinitha, Geetha Ramadas, P. Usha Rani
Summary: Electric vehicles are favored for their environmentally friendly nature and preservation of natural resources. Research on electric vehicle charging stations has focused on technical and economic feasibility, with a few studies considering power fluctuations caused by load variations. This study proposes an optimization-based feasp for controlling power fluctuations using an Enhanced Particle Swarm Optimization based Fuzzy Logic Controller (FLC), which effectively reduces fluctuations and stabilizes the system in the shortest time. Comparison with conventional methods justifies the effectiveness of the proposed controller tuning.
JOURNAL OF ELECTRICAL ENGINEERING & TECHNOLOGY
(2023)
Article
Energy & Fuels
Khairy Sayed, Ziad M. Ali, Mujahid Dhaifullah
Article
Green & Sustainable Science & Technology
Ali Mohamed Eltamaly, Mamdooh Al-Saud, Khairy Sayed, Ahmed G. Abo-Khalil
Article
Engineering, Electrical & Electronic
Ahmed G. Abo-Khalil, Ali M. Eltamaly, Mamdooh S. Alsaud, Khairy Sayed, Ali S. Alghamdi
Summary: This paper introduces a model reference adaptive system (MRAS) method for estimating the position and speed of a permanent magnet synchronous motor (PMSM) by minimizing errors between real and estimated values. The proposed method shows good performance and accurate speed-tracking capability under various speed and load torque conditions, compared with the sliding mode observer (SMO).
INTERNATIONAL TRANSACTIONS ON ELECTRICAL ENERGY SYSTEMS
(2021)
Article
Energy & Fuels
Abdulaziz Almutairi, Khairy Sayed, Naif Albagami, Ahmed G. Abo-Khalil, Hedra Saleeb
Summary: The paper introduces a new multi-port DC-DC power converter to address the intermittent nature and slow response of renewable energy applications. By combining renewable energy sources with statistical trends and integrating with energy storage systems, it can reduce the impact of intermittency and improve response speed. The proposed converter not only reduces system costs and size, improves efficiency and reliability, but also enhances the overall system dynamics.
Article
Engineering, Electrical & Electronic
Hedra Saleeb, Rasha Kassem, Khairy Sayed
Summary: This article presents an artificial neural network (ANN) based control strategy for reducing losses in electric vehicles driven by induction motors using direct torque control. The strategy controls the amplitude of starting current to save power, and its performance was verified through simulations and experiments, showing good efficiency and reduced core losses in the induction motor system.
ELECTRICAL ENGINEERING
(2022)
Article
Energy & Fuels
Khairy Sayed, Abdulaziz Almutairi, Naif Albagami, Omar Alrumayh, Ahmed G. Abo-Khalil, Hedra Saleeb
Summary: This paper comprehensively reviews the current status of multidisciplinary technologies in electric vehicles and explores the challenges in power electronics technology for driving electric vehicles. The paper aims to address the practical issues of future electric vehicles and provide researchers with an overview of the latest techniques in the field, particularly power electronics-based solutions. It also discusses various circuit topologies and power converters, highlighting the drawbacks and possible enhancements.
Article
Engineering, Multidisciplinary
Ahmed G. Abo-Khalil, Khairy Sayed, Ahmed Elnozahy, B. G. Yu
Summary: In this study, the static and dynamic characteristics of tidal turbines were analyzed through modeling and experimentation. The rotational speed of the PMSG was regulated using the conventional optimum tip-speed ratio method to extract maximum power at different tidal velocities. The experimental results confirmed the effectiveness of the proposed controller.
JOURNAL OF ENGINEERING RESEARCH
(2022)
Article
Computer Science, Information Systems
Khairy Sayed, Ahmed G. Abo-Khalil
Summary: This paper introduces a novel soft-switched power converter for telecommunication power supply. The converter features low voltage/current stresses, minimal current circulation, reduced components, improved efficiency, high power density, and economic circuit configurations. The effective feasibility of the proposed converter is proven through theoretical analysis and practical verification.
Article
Chemistry, Physical
Khairy Sayed, Sayed Abdel-Khalek, Hesham M. H. Zakaly, Mahmoud Aref
Summary: This paper presents a new approach of energy management for a fuel cell electric vehicle traction system. The impact of connecting a supercapacitor in parallel with the electric vehicle battery on battery lifetime and range is examined. Fuzzy logic control and proportional integral control methods are used to control the system, and the effectiveness of the proposed method is demonstrated through simulation results.
Article
Energy & Fuels
Omar Alrumayh, Khairy Sayed, Abdulaziz Almutairi
Summary: This paper proposes a control technique to maintain the connection of an inverter to the grid voltage and accommodate the required grid connection in a large-scale grid-connected photovoltaic plant. The control strategy aims to improve the low-voltage ride-through capability of grid-connected PV power generation plants. A dynamic analysis of a 20 MW solar PV power plant is conducted to determine the impact of three-phase short-circuits at the point of common-coupling (PCC). The reactive power support allows for faster restoration of voltage values at the PCC, enhancing the system stability under transient disturbances.
Article
Thermodynamics
Ahmed G. Abo-Khalil, Khairy Sayed, Ali Radwan, Ibrahim I. A. El-Sharkawy
Summary: The UAE has favorable weather conditions for integrating renewable energies, especially photovoltaic solar energy, into the utility grid. It possesses one of the highest rates of solar radiation in the world, which contributes to reducing greenhouse gas emissions. This article discusses a study on controlling the variability of electricity production from solar energy and improving its integration for self-consumption. It covers topics such as energy storage, photovoltaic production, and optimizing the dimensioning of production systems. The research also examines the economic feasibility and profitability of this technology for a selected building.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Mathematics, Interdisciplinary Applications
Nessma M. Ahmed, Mohamed Ebeed, Gaber Magdy, Khairy Sayed, Samia Chehbi Gamoura, Ahmed Sayed M. Metwally, Alaa A. Mahmoud
Summary: This paper proposes a combined feedback and feed-forward control system for frequency regulation of multi-area interconnected hybrid microgrids. The proposed system uses a FOPIDA-FOIDN controller, with parameters optimized using two metaheuristic optimization algorithms. The performance of the control system is compared to other controllers and validated through MATLAB simulations, demonstrating its reliability and robustness.
FRACTAL AND FRACTIONAL
(2023)
Article
Engineering, Multidisciplinary
Ahmed Elnozahy, Moayed Mohamed, Khairy Sayed, Mohamed Bahyeldin, Shazly A. Mohamed
Summary: This paper introduces a fuzzy and neuro-fuzzy algorithm for fault detection and location in high-voltage transmission lines, achieving full success in detecting and identifying different fault types.
INTERNATIONAL JOURNAL OF MODELLING AND SIMULATION
(2023)
Article
Energy & Fuels
Nessma M. Ahmed, Mohamed Ebeed, Khairy Sayed, Ayman Alhejji, Ahmed Refai
Summary: This paper proposes a cascade proportional derivative-proportional integral (PD-PI) controller tuned with a novel optimizer, gorilla troops optimization (GTO) algorithm, for load frequency control of an isolated micro-grid. The simulation results demonstrate the effectiveness of the proposed controller in different scenarios.
INTERNATIONAL JOURNAL OF RENEWABLE ENERGY RESEARCH
(2023)
Article
Multidisciplinary Sciences
Ali S. Alghamdi, Khairy Sayed, Ahmed G. Abokhalil, Ahmed Bilal Awan, Mohamed A. Zohdy
Summary: This paper presents a soft-switching circuit for a three-phase inverter used in a servomotor driver, achieving soft switching on the DC link with an auxiliary quasi-resonant circuit. The effectiveness of the soft-switching operation is validated through simulations and experimental work, with power loss analyses conducted to verify the inverter's efficiency.
INTERNATIONAL TRANSACTION JOURNAL OF ENGINEERING MANAGEMENT & APPLIED SCIENCES & TECHNOLOGIES
(2021)
