An Electrolytic Capacitorless Bidirectional EV Charger for V2G and V2H Applications

Kwon, Minho; Choi, Sewan

doi:10.1109/tpel.2016.2630711

Cited by 129 publications

(44 citation statements)

References 37 publications

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“…In Kwon and Choi, a bidirectional converter topology is proposed for V2G, grid‐to‐vehicle, and vehicle‐to‐home (V2H) operations. In this research, the use of electrolytic capacitor is eliminated by using sinusoidal charging approach with DC/DC convertor to control the mode changes and a nonregulating resonant series convertor is implemented for isolation purposes.…”

Section: Battery Chargers and Charging Systems For Electric Vehiclesmentioning

confidence: 99%

Assessment of electric vehicles concerning impacts, charging infrastructure with unidirectional and bidirectional chargers, and power flow comparisons

et al. 2018

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Summary The advancement and deployment of electric vehicle (EV) technologies are considered as an emergent solution to meet the current and future energy crises. The electrification of transportation systems is a promising approach to green the transportation systems and to reduce the issues of climate change. This paper investigates the present status, latest deployment, and challenging issues in the implementation of EV infrastructure, charging power levels, in conjunction with several charging power topologies, and analyzes EV impacts and prospects in society. In this study, the on‐board and off‐board categories of charging systems with unidirectional and bidirectional power flow comparison are addressed. Moreover, an extensive analysis of unidirectional and bidirectional chargers is presented. Unidirectional charging offers hardware limitation and reduces the interconnection issues. Bidirectional charging provides the fundamental feature of vehicle‐to‐grid technology. Furthermore, the beneficial and harmful impacts of EVs are categorized with remedial measures for harmful impacts and prolific benefits for beneficial impacts.

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Section: Battery Chargers and Charging Systems For Electric Vehiclesmentioning

confidence: 99%

Assessment of electric vehicles concerning impacts, charging infrastructure with unidirectional and bidirectional chargers, and power flow comparisons

et al. 2018

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“…The relative drawbacks of multistage topologies have led to the development of single-stage topologies which transfer active power without any intermediate stage. They have a better power density and reliability due to the exclusion of the dc link electrolytic capacitor [6]. Several single-stage-isolated EV charger topologies have been proposed in [7]- [8] [9].…”

Section: Section I Introductionmentioning

confidence: 99%

A Bidirectional Soft-Switched DAB-Based Single-Stage Three-Phase AC–DC Converter for V2G Application

Das

Weise

Basu

et al. 2019

IEEE Trans. Transp. Electrific.

159

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In vehicle-to-grid applications, the battery charger of the electric vehicle (EV) needs to have a bidirectional power flow capability. Galvanic isolation is necessary for safety. An ac-dc bidirectional power converter with high-frequency isolation results in high power density, a key requirement for an on-board charger of an EV. Dual-active-bridge (DAB) converters are preferred in medium power and high voltage isolated dc-dc converters due to high power density and better efficiency. This paper presents a DAB-based three-phase ac-dc isolated converter with a novel modulation strategy that results in: 1) single-stage power conversion with no electrolytic capacitor, improving the reliability and power density; 2) open-loop power factor correction; 3) soft-switching of all semiconductor devices; and 4) a simple linear relationship between the control variable and the transferred active power. This paper presents a detailed analysis of the proposed operation, along with simulation results and experimental verification.

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“…However, in this device the outer switches are substituted for diodes, D p and D n , as shown in Figure 1, which restrict the flow of energy from DC to AC. Furthermore, we consider a single-phase topology, for application to the on board charger (OBC) of an EV, because of the simplified structure of this configuration, and its use of fewer switching devices [12][13][14][15]. …”

Section: Introductionmentioning

confidence: 99%

Improving Line Current Distortion in Single-Phase Vienna Rectifiers Using Model-Based Predictive Control

2018

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Conventional single-phase Vienna rectifiers employ proportional-integral (PI) controllers which are appropriate for controlling DC components, to regulate their line currents. However, in the regions close to the line current's zero-crossing point, the dynamics of PI controllers are too slow to respond to the reference current, which has an AC component. Hence, the power factor (PF) of the device is degenerated, and total harmonic distortion (THD) increases. A controller with a fast dynamic response is thus required to solve this problem. In this paper, we investigate the use of a model-based predictive controller (MPC), which has a faster dynamic response than a PI controller, to improve the line current quality of a single-phase Vienna rectifier. With this method, the average current in both the continuous current mode (CCM) and the discontinuous current mode (DCM) of operation are controlled using a mode detection method. Moreover, we calculate the optimized duty cycle for the single-phase Vienna rectifier, by predicting the next current state. We verify the operation of the proposed algorithm using a PSIM simulation, and a practical experiment conducted with a 1-kW-rated single-phase Vienna rectifier prototype. With the proposed method, the quality of the line current near the zero-crossing point is improved, and the PF is controlled to unity.

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An Electrolytic Capacitorless Bidirectional EV Charger for V2G and V2H Applications

Cited by 129 publications

References 37 publications

Assessment of electric vehicles concerning impacts, charging infrastructure with unidirectional and bidirectional chargers, and power flow comparisons

Assessment of electric vehicles concerning impacts, charging infrastructure with unidirectional and bidirectional chargers, and power flow comparisons

A Bidirectional Soft-Switched DAB-Based Single-Stage Three-Phase AC–DC Converter for V2G Application

Improving Line Current Distortion in Single-Phase Vienna Rectifiers Using Model-Based Predictive Control

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