12-pulse Rectifier with DC-Side Buck Converter for Electric Vehicle Fast Charging

Lan, Dun; Wu, Yang; Soeiro, Thiago Batista; Granello, Pierpaolo; Qin, Zian; Bauer, Pavol

doi:10.1109/iecon49645.2022.9968872

Cited by 3 publications

(2 citation statements)

References 16 publications

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“…Additionally, with the increasing prevalence of electric vehicles (EVs) and the expansion of charging infrastructure, the impact of EV charging stations on the grid is significant [22]. Commonly, EV chargers use 12-pulse uncontrollable machines, which inject harmonics of the form 12k ± 1 into the grid [23]. If these chargers operate during a resonance condition, they could cause substantial harmonic voltages at the PCC, leading to system instability.…”

Section: Typical Gfm Inverter Impedance Modelingmentioning

confidence: 99%

Harmonic Resonance Mechanisms and Influencing Factors of Distributed Energy Grid-Connected Systems

Xu,

Li,

et al. 2024

WEVJ

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With the rapid development of global energy transformation and new power system, ensuring the stability of distributed energy grid connections is the key to maintaining the reliable operation of the whole power system. This paper constructs detailed impedance models of grid-following (GFL) and grid-forming (GFM) inverters using a harmonic linearization method and thoroughly investigates the mechanisms of resonance when inverters are connected to the grid, as well as the impact of model parameters on the stability of the grid system. This paper also briefly analyzes the scenario where distributed energy and electric vehicles are integrated into the grid simultaneously, demonstrating that grid system stability can be ensured in complex grid situations through reasonable parameter design. Lastly, the accuracy of the proposed impedance models and analysis is verified through MATLAB/Simulink simulations.

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Section: Typical Gfm Inverter Impedance Modelingmentioning

confidence: 99%

Harmonic Resonance Mechanisms and Influencing Factors of Distributed Energy Grid-Connected Systems

Xu,

Li,

et al. 2024

WEVJ

View full text Add to dashboard Cite

show abstract

“…Regarding the technical issues related to the implementation of a vehicle battery charger, voltage levels of hundreds of volts shall be taken into account, so that protection of users and vehicle itself is a top level requirement. To address that, galvanic insulation of the battery from the ground and electrical connection of the vehicle chassis to the ground itself are required [8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Automotive Battery Charging based on Efficient Capacitive Power Transfer

Pellitteri,

Campagna,

Granello

et al. 2023

2023 International Conference on Clean Electrical Power (ICCEP)

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Isolated power converters find application in different fields of electric mobility, such as battery charging, where galvanic insulation between on-board storage system and electrical grid is required. Conventional isolated systems are based on the use of transformers, which have the drawback to be bulky and expensive. Nevertheless, insulation implemented by capacitances can be attractive due to the recent technological advances, contributing to increasingly compact, cheap and efficient converters. In this paper, an isolated power converter based on capactive power transfer (CPT), along with the switched capacitor concept, is proposed. GaN FETs are employed as switching power devices in order to handle high operation frequencies with limited power losses. In this work a 500 kHz switching frequency has been selected, with notable benefits brought to the overall power converter in terms of compactness. The developed prototype has been experimentally tested according to a target power level of 3 kW, to prove the proper operation of the proposed converter. The experimental tests have demonstrated a power transfer efficiency as high as 95%.

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Mitigation of Low Harmonic Ripples Based on the Three-Phase Dual Active Bridge Converter in Charging Station Applications

Goto,

Pham,

Nguyen

et al. 2024

Electronics

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To minimize the recharge time of EVs, Level 3 charging stations utilizing DC fast charging systems have become increasingly prevalent. Additionally, these systems offer bidirectional functionality, aiding in stabilizing the DC grid during peak hour. As a result, the DC–DC converters utilized in such systems must be capable of bidirectional energy transfer. Among existing typologies, DAB converters are preferred due to their simplicity and sustainability. The three-phase DAB (DAB3) is favored because the output ripple is lower compared to the single-phase structure. This characteristic assists in mitigating the negative effects on the battery caused by high-frequency current ripple. However, the input to DAB3 converters typically originates from AC–DC stages, leading to the inclusion of low harmonic frequency ripples (e.g., multiples of 360 Hz). These ripples are then transferred to the battery, increasing its temperature. To address this issue, this paper proposes a technique to mitigate negative effects by attenuating these low frequencies in the charging current. Simulations were conducted to demonstrate the effectiveness of the proposed technique. Scaled-down experiments utilizing a DAB3 prototype were conducted to corroborate the simulations. The findings demonstrated a reduction in ripple from 8.66% to below 2.67% when compared to the original controller. This reduction enabled the solution to meet the limiting current ripple criteria outlined in the CHAdeMO standard.

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12-pulse Rectifier with DC-Side Buck Converter for Electric Vehicle Fast Charging

Cited by 3 publications

References 16 publications

Harmonic Resonance Mechanisms and Influencing Factors of Distributed Energy Grid-Connected Systems

Harmonic Resonance Mechanisms and Influencing Factors of Distributed Energy Grid-Connected Systems

Automotive Battery Charging based on Efficient Capacitive Power Transfer

Mitigation of Low Harmonic Ripples Based on the Three-Phase Dual Active Bridge Converter in Charging Station Applications

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