Constant Current Fast Charging of Electric Vehicles via a DC Grid Using a Dual-Inverter Drive

Shi, Ruoyun; Semsar, Sepehr; Lehn, Peter W.

doi:10.1109/tie.2017.2686362

Cited by 77 publications

(22 citation statements)

References 20 publications

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“…This AC-DC conversion (or DC-AC-DC) causes a significant energy loss. However, a DC microgrid grid can provide power to the houses, ships, and electric vehicles' charging stations to eradicate the energy conversion losses [1][2][3]. In a DC microgrid system, the AC power converts to the DC power using a high efficient rectifier, and converting DC power distributes directly to DC equipment.…”

Section: Motivationmentioning

confidence: 99%

Design and Line Fault Protection Scheme of a DC Microgrid Based on Battery Energy Storage System

et al. 2018

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Currently, the Direct-Current (DC) microgrid has been gaining popularity because most electronics devices require a DC power input. A DC microgrid can significantly reduce the AC to DC energy conversion loss. However, a power grid may experience a line fault situation that may damage important household devices and cause a blackout in the power system. This work proposes a new line fault protection scheme for a DC microgrid system by using a battery energy storage system (BESS). Nowadays, the BESS is one of the most cost effective energy storage technologies for power system applications. The proposed system is designed from a distributed wind farm smart grid. A total of three off-shore wind farms provide power to the grid through a high voltage DC (HVDC) transmission line. The DC microgrid was modeled by a BESS with a bi-directional DC-DC converter, various DC-loads with step down DC-DC converters, a voltage source converter, and a voltage source inverter. Details of the control strategies of the DC microgrid are described. During the line fault situation, a transient voltage was controlled by a BESS. From the simulation analyses, it is confirmed that the proposed method can supply stable power to the DC grid, which can also ensure protection of several loads of the DC microgrid. The effectiveness of the proposed system is verified by in a MATLAB/SIMULINK ® environment.

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Section: Motivationmentioning

confidence: 99%

Design and Line Fault Protection Scheme of a DC Microgrid Based on Battery Energy Storage System

et al. 2018

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“…Publications presenting the possibility of application of three-phase half-bridge voltage inverters as components for DC/DC converters in the EV charging stations are rarely seen. In particular, these three-phase Pulse Width Modulation (PWM) inverters are used in the induction motor drives [9]. The majority part of literature on the subject describes solutions with single-phase full-bridge PWM inverters [1,10].…”

Section: Introductionmentioning

confidence: 99%

Unidirectional DC/DC Converter with Voltage Inverter for Fast Charging of Electric Vehicle Batteries

et al. 2020

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The paper proposes the adaptation of the industrial plant’s power network to supply electric vehicle (EV) fast-charging converters (above 300 kW) using renewable energy sources (RESs). A 600 V DC microgrid was used to supply energy from RESs for the needs of variable speed motor drives and charging of EV batteries. It has been shown that it is possible to support the supply of drive voltage frequency converters (VFCs) and charging of EV batteries converters with renewable energy from a 600 V DC microgrid, which improves the power quality indicators in the power system. The possibility of implementing the fast EV batteries charging station to the industrial plant’s power system in such a way that the system energy demand is not increased has also been shown. The EV battery charging station using the drive converter has been presented, as well as the results of simulation and laboratory tests of the proposed solution.

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“…The charging mode of EVs is mainly divided into slow charging [3] and fast charging [4]. Slow charging is appropriate for low-power on-board chargers [5], the charging time of which is customarily in excess of 6 h. On the contrary, fast charging is generally utilized to high-power off-board chargers, which is an attractive option over slow charging due to its potential to fully charge the EV in less than 1 h [6]. Thus, fast charging is favored by consumers thanks to economize on time [7].…”

Section: Introductionmentioning

confidence: 99%

Virtual Synchronous Motor Based-Control of a Three-Phase Electric Vehicle Off-Board Charger for Providing Fast-Charging Service

Yan

Zhang

et al. 2018

Applied Sciences

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This study introduces a three-phase virtual synchronous motor (VSM) control and its possible application for providing fast-charging service from off-board chargers of electric vehicles (EVs). The main circuit of the off-board charger consists of a three-phase voltage source PWM rectifier (VSR) and a resonant LLC zero-voltage-switching converter. In the proposed control approach, VSM-controlled pre-stage VSR emulates the external characteristics of a synchronous motor (SM), simultaneously, droop control based on charging mode in the VSM can satisfy the demand of the EVs constant-current fast-charging; The post-stage DC-DC converter is responsible for stabilizing the DC bus voltage. The feature of this control strategy is that VSM and fast charging control are implemented by the pre-stage converter, which has better coordination. In the MATLAB, the equivalent synchronous grid of the distribution network supplies to the power battery through the off-board charger, and the effectiveness of the presented control is demonstrated by typical working conditions.

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Constant Current Fast Charging of Electric Vehicles via a DC Grid Using a Dual-Inverter Drive

Cited by 77 publications

References 20 publications

Design and Line Fault Protection Scheme of a DC Microgrid Based on Battery Energy Storage System

Design and Line Fault Protection Scheme of a DC Microgrid Based on Battery Energy Storage System

Unidirectional DC/DC Converter with Voltage Inverter for Fast Charging of Electric Vehicle Batteries

Virtual Synchronous Motor Based-Control of a Three-Phase Electric Vehicle Off-Board Charger for Providing Fast-Charging Service

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