Analysis of AC/DC/DC Converter Modules for Direct Current Fast-Charging Applications

Piasecki, Szymon; Zaleski, Jaroslaw; Jasiński, Marek; Bachman, Serafin; Turzyński, Marek

doi:10.3390/en14196369

Cited by 16 publications

(4 citation statements)

References 56 publications

(111 reference statements)

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“…The nature of the power source defines which parameter (voltage or current) is constant. For example, if the voltage is constant and the current is variable, such systems are defined as the voltage electric systems, and vice-versa; if the current is constant and the voltage is variable, such systems are defined as the current electric systems [41].…”

Section: Discussion Of Phenomena Of Dual Electric Systemsmentioning

confidence: 99%

Efficiency Evaluation of the Dual System Power Inverter for On-Grid Photovoltaic System

et al. 2021

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The implementation of a dual electric system that is capable of operating with either constant current and variable voltage, or constant voltage and variable current appliances, is one of the possible options to solve low-intensity stochastic energy utilization problems from renewable energy sources. This research paper analyzes the potential benefit of a novel three-phase dual system power inverter over the conventional inverter used in a solar power plant. The concept of such a power inverter is explained, and the digital twin model is created in a MATLAB Simulink environment. The efficiency characteristic of the simulated inverter is compared to the efficiency characteristic of a real conventional inverter. A standalone data logging system and an additional data acquisition system were used to collect and process data from the real inverter. Comparison of the digital twin inverter and the real conventional inverter shows the potential benefit of this novel inverter technology. It is shown that the novel inverter can operate in a wider range of DC input power. The potential economic benefit is also presented and discussed in the paper.

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Section: Discussion Of Phenomena Of Dual Electric Systemsmentioning

confidence: 99%

Efficiency Evaluation of the Dual System Power Inverter for On-Grid Photovoltaic System

et al. 2021

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“…They are generally designed as single-phase H-bridge inverters or threephase three-leg inverters either controlled or uncontrolled rectifiers [137]. The AC-DC conversion is the first stage of the EV charging system, and it controls reactive power consumption and grid-side current harmonics [207]. The PFC technique is implemented in the AC-DC converter to supply efficient and safe power output to protect the connected devices, users, and the grid.…”

Section: A Ac-dc Convertersmentioning

confidence: 99%

Review of Electric Vehicle Charging Technologies, Standards, Architectures, and Converter Configurations

et al. 2023

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Electric Vehicles (EVs) are projected to be one of the major contributors to energy transition in global transportation due to their rapid expansion. High-level of EVs integration into the electricity grid will introduce many challenges for the power grid planning, operation, stability, standards, and safety. Therefore, the wide-scale adoption of EVs imposes research and development of charging systems and EV supply equipment (EVSE) to achieve expected charging solutions for EV batteries as well as to improve ancillary services. Analysis of the status of EV charging technologies is important to accelerate EV adoption with advanced control strategies to discover a remedial solution for negative impacts and to enhance desired charging efficiency and grid support. This paper presents a comprehensive review of EV charging technologies, international standards, the architecture of EV charging stations, and the power converter configurations of EV charging systems. The charging systems require a dedicated converter topology, a control strategy, compatibility with standards, and grid codes for charging and discharging to ensure optimum operation and enhance grid support. An overview of different charging systems in terms of onboard and offboard chargers, AC-DC and DC-DC converter configuration, and AC and DC-based charging station architectures are evaluated. In addition, recent charging systems which are integrated with renewable energy sources are presented to identify the power train of modern charging stations. Finally, future trends and challenges in EV charging and grid integration issues are summarized as the future direction of the research.INDEX TERMS Electric vehicle, charging configuration, grid integration, international standards, onboard and offboard charger, power converters.

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“…In that effort, the LLC resonant converters have a special place due to their high power densities, higher efficiencies, small size and lighter structures. Because of their unique features, they are capable of transferring DC power with the highest possible efficiency in both directions, i.e., grid-to-battery and battery-to-grid [1,2].…”

Section: Introductionmentioning

confidence: 99%

Smart Efficiency Tracking for Novel Switch—LLC Converter for Battery Charging Applications

Çalışkan

Üstün

2022

Energies

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In this study, a novel smart efficiency tracking (SET) algorithm for GaN-based LLC resonant converter for quick battery charging of light electric vehicles is proposed. Conventional frequency modulation (FM) method, single pulse width modulation method (S-PWM) and discontinuous operation mode method (DOM) are used to track the converter efficiency which varies for different loading conditions during the battery charging process. First, the charging modes are explained to define the efficiency variation clearly. Then, the theoretical background of GaN-based LLC resonant converter is presented and the details of design study are given. Third, the principles of three different switching control strategies, the modeling study and the simulation results are put forward. Finally, the details of the implementation of three different switching strategies are presented for the validation of the study. Furthermore, the implementation of the design and its impact on battery charging are discussed. The proposed efficiency tracking method is validated with a 20% efficiency increase for the low loading conditions of GaN-based LLC converter.

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Analysis of AC/DC/DC Converter Modules for Direct Current Fast-Charging Applications

Cited by 16 publications

References 56 publications

Efficiency Evaluation of the Dual System Power Inverter for On-Grid Photovoltaic System

Efficiency Evaluation of the Dual System Power Inverter for On-Grid Photovoltaic System

Review of Electric Vehicle Charging Technologies, Standards, Architectures, and Converter Configurations

Smart Efficiency Tracking for Novel Switch—LLC Converter for Battery Charging Applications

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