Design Methodology of a Three-Phase Four-Wire EV Charger Operated at the Autonomous Mode

Fu, Yongsheng; Yu, Li; Huang, Yang; Bai, Hua; Zou, Ke; Lu, Xi; Chen, Chingchi

doi:10.1109/tte.2019.2957635

Cited by 24 publications

(13 citation statements)

References 26 publications

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“…Substituting Equations (19)-(21) into Equation (18) and letting V dc /2V tri = K pwm yield the following:…”

Section: Of 22mentioning

confidence: 99%

“…Electronic Load In the aspect of the efficiency comparison with different technologies, it is indeed difficult to establish a fair comparative basis due to some system constrains, e.g., the switching technique used, system capacities, quality of components used, and the control functions designed for the circuits. To provide a set comparative result, three recently published technical papers [16][17][18] using different technologies are summarized in Table 5. Figure 27 shows a set of thermographic photos (using FLIER-E63900, T198547, E4) of the proposed GaN-based three-phase APF prototype operating under the rated capacity of 2 kW with different switching frequencies.…”

Section: Programmablementioning

confidence: 99%

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Design and Implementation of a GaN-Based Three-Phase Active Power Filter

2020

Micromachines

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Renewable energy (RE)-based power generation systems and modern manufacturing facilities utilize a wide variety of power converters based on high-frequency power electronic devices and complex switching technologies. This has resulted in a noticeable degradation in the power quality (PQ) of power systems. To solve the aforementioned problem, advanced active power filters (APFs) with improved system performance and properly designed switching devices and control algorithms can provide a promising solution because an APF can compensate for voltage sag, harmonic currents, current imbalance, and active and reactive powers individually or simultaneously. This paper demonstrates, for the first time, the detailed design procedure and performance of a digitally controlled 2 kVA three-phase shunt APF system using gallium nitride (GaN) high electron mobility transistors (HEMTs). The designed digital control scheme consists of three type II controllers with a digital signal processor (DSP) as the control core. Using the proposed APF and control algorithms, fast and accurate compensation for harmonics, imbalance, and reactive power is achieved in both simulation and hardware tests, demonstrating the feasibility and effectiveness of the proposed system. Moreover, GaN HEMTs allow the system to achieve up to 97.2% efficiency.

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“…Substituting Equations (19)-(21) into Equation (18) and letting V dc /2V tri = K pwm yield the following:…”

Section: Of 22mentioning

confidence: 99%

Section: Programmablementioning

confidence: 99%

Design and Implementation of a GaN-Based Three-Phase Active Power Filter

2020

Micromachines

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“…Meanwhile, extended controller design arose, such as [17] [18] for current control strategy and [19] for current and voltage controllers design. Inspired by this topology, many scholars have conducted further research, Fu et al [3] considered a 3-Phase 4-Wire EV charger operated at the autonomous mode, Lin et al [20] studied optimised design of the neutral inductor and filter inductors, Manandhar et al [21] discussed the problem of active DC-link balancing together with voltage regulation and a neutral point voltage stable module for unbalanced load inhibition is explored in [22].…”

Section: Introductionmentioning

confidence: 99%

Robust H∞$H_\infty$ dynamic output feedback control of the DC–AC converter with a neutral leg

Zhao

Dong

2022

IET Power Electronics

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This paper investigates the problem of robust H ∞ dynamic output feedback control of 3-phase 4-wire converter with neutral bridge arm in the application of smart grid and distributed generation. Based on Lyapunov functions, a novel sufficient Linear Matrix Inequality condition analysis was performed on the dynamic output feedback stabilisation controllers. Meanwhile, some auxiliary slack variables with special structure and wellestablished performance conditions are employed to reduce design conservatism. This topology along with the H ∞ controller can solve the DC link balancing problem and maintain the deviation between the neutral point and the midpoint of DC supply very small. The achievable performance is analysed quantitatively and the controller design method was conducted and verified both in MATLAB simulation and the real-time simulation platform built by StarSim and MT, respectively.

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“…The latter property is useful to compensate unbalanced loads in local weak grids, functioning as a power conditioner. Different topologies can be found in the literature: split capacitor with [8] and without [9,10] neutral inductor, four-leg with [11] and without [6] neutral inductor, and independently controlled neutral module [12,13].…”

Section: Introductionmentioning

confidence: 99%

AC Current Ripple Harmonic Pollution in Three-Phase Four-Leg Active Front-End AC/DC Converter for On-Board EV Chargers

et al. 2021

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Three-phase four-leg voltage-source converters have been considered for some recent projects in smart grids and in the automotive industry, projects such as on-board electric vehicles (EVs) chargers, thanks to their built-in ability to handle unbalanced AC currents through the 4th wire (neutral). Although conventional carrier-based modulations (CBMs) and space vector modulations (SVMs) have been commonly applied and extensively studied for three-phase four-leg voltage-source converters, very little has been reported concerning their pollution impact on AC grid in terms of switching ripple currents. This paper introduces a thorough analytical derivation of peak-to-peak and RMS values of the AC current ripple under balanced and unbalanced working conditions, in the case of three-phase four-leg converters with uncoupled AC-link inductors. The proposed mathematical approach covers both phase and neutral currents. All analytical findings have been applied to two industry recognized CBM methods, namely sinusoidal pulse-width modulation (PWM) and centered PWM (equivalent to SVM). The derived equations are effective, simple, and ready-to-use for accurate AC current ripple calculations. At the same time, the proposed equations and diagrams can be successfully adopted to design the conversion system basing on the grid codes in terms of current ripple (or total harmonic distortion (THD)/total demand distortion (TDD)) restrictions, enabling the sizing of AC-link inductors and the determination of the proper switching frequency for the given operating conditions. The analytical developments have been thoroughly verified by numerical simulations in MATLAB/Simulink and by extensive experimental tests.

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Design Methodology of a Three-Phase Four-Wire EV Charger Operated at the Autonomous Mode

Cited by 24 publications

References 26 publications

Design and Implementation of a GaN-Based Three-Phase Active Power Filter

Design and Implementation of a GaN-Based Three-Phase Active Power Filter

Robust H∞$H_\infty$ dynamic output feedback control of the DC–AC converter with a neutral leg

AC Current Ripple Harmonic Pollution in Three-Phase Four-Leg Active Front-End AC/DC Converter for On-Board EV Chargers

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