Design of Bidirectional DC–DC Resonant Converter for Vehicle-to-Grid (V2G) Applications

Zahid, Zaka Ullah; Dalala, Zakariya; Chen, Rui; Chen, Baifeng; Lai, Jih‐Sheng

doi:10.1109/tte.2015.2476035

Cited by 266 publications

(100 citation statements)

References 26 publications

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“…In fact, the voltage gain is changed by both m and Q factors. One simple approach to select these parameters is setting the switching frequency to be the resonant frequency, so that F x becomes 1 [36][37][38]. By doing so, (9) can be simplified as below.…”

Section: Llc Converter Operationmentioning

confidence: 99%

Design and Control of a 13.2 kV/10 kVA Single-Phase Solid-State-Transformer with 1.7 kV SiC Devices

et al. 2018

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This paper describes the power stage design, control, and performance evaluation of a 13.2 kV/10 kVA solid-state-transformer (SST) for a power distribution system. The proposed SST consists of 10 modules where each individual module contains a unidirectional three-level power factor correction (PFC) converter for the active-front-end (AFE) stage and an LLC resonant converter for the isolated DC-DC stage. The operating principles of the converters are analyzed and the modulation and the control schemes for the entire module are described in detail. The DC-link voltage imbalance is also less than other SST topologies due to the low number of uncontrollable switching states. In order to simplify the control of the power stage, a modulation strategy for the AFE stage is proposed, and the modulation frequency of the LLC converter is also fixed. In addition, a compensation algorithm is suggested to eliminate the current measurement offset in the AFE stage. The proposed SST achieves the unity power factor at the input AC current regardless of the reactive or nonlinear load and a low voltage regulation at the AC output. In order to verify the effectiveness of the SST, the 13.2 kV/10 kV SST prototype is built and tested. Both the simulation and the experimental results under actual 13.2 kV line show the excellent performance of the proposed SST scheme.

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Section: Llc Converter Operationmentioning

confidence: 99%

Design and Control of a 13.2 kV/10 kVA Single-Phase Solid-State-Transformer with 1.7 kV SiC Devices

et al. 2018

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“…I Lm1,0 and I Lm2,0 is the initial value of I Lm1 and I Lm2 : (25) Realizing that u AB (t) = U H and substituting (19) and (21) into (20), gives:…”

Section: Estimation Of the Body Diodes' Conduction Timementioning

confidence: 99%

Studies on a Hybrid Full-Bridge/Half-Bridge Bidirectional CLTC Multi-Resonant DC-DC Converter with a Digital Synchronous Rectification Strategy

et al. 2018

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This study presents a new bidirectional multi-resonant DC-DC converter, which is named CLTC. The converter adds an auxiliary transformer and an extra resonant capacitor based on a LLC resonant DC-DC converter, achieving zero-voltage switching (ZVS) for the input inverting switches and zero-current switching (ZCS) for the output rectifiers in all load range. The converter also has a wide gain range in two directions. When the load is light, a half-bridge configuration is adopted instead of a full-bridge configuration to solve the problem of voltage regulation. By this method, the voltage gain becomes monotonous and controllable. Besides, the digital synchronous rectification strategy is proposed in forward mode without adding any auxiliary circuit. The conduction time of synchronous rectifiers equals the estimation value of body diodes' conduction time with the lightest load. Power loss analysis is also conducted in different situations. Finally, the theoretical analysis is validated by a 5 kW prototype.

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“…Using an on-board active rectifier to control the power supplied to the load can also potentially result in higher on-board power density than adding a dedicated DC/DC converter after a passive rectifier. The assumed topology will also allow for bidirectional power flow [9], [10].…”

Section: System Topology and Control System A Rpev System Configumentioning

confidence: 99%

Transient Control of Dynamic Inductive EV Charging and Impact on Energy Efficiency when Passing a Roadside Coil Section

Guidi

Suul

2018

2018 IEEE PELS Workshop on Emerging Technologies: Wireless Power Transfer (Wow)

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 Abstract-This paper discusses the transient control of a system for dynamic inductive power transfer to an electric vehicle when passing a road-side coil section. A series-seriescompensated topology with minimum number of passive components is assumed and a slight detuning of the resonance frequencies is introduced to limit the maximum induced current on the vehicle-side. A simple strategy for independent control of the road-side and vehicle-side coils is presented for ensuring strictly controlled charging power. The dynamic response of the resonant currents and of the power transfer is assessed by a small-scale experimental setup designed to represent a freight truck in scale 1:14. Experimental evaluation of the energy transfer efficiency is performed for high and low vehicle speeds and with different strategies for activating the control loops. The results demonstrate that the proposed strategy can ensure very short initialization transients and close-to-optimal operation at rated power when the vehicle-side coil is passing above the roadside coil, even at relatively high traveling speed. The concept of road utilization ratio is introduced to quantify the effect of length and layout of the road coil sections, as well as the dynamic transients, on the energy transfer capability of the system.

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Design of Bidirectional DC–DC Resonant Converter for Vehicle-to-Grid (V2G) Applications

Cited by 266 publications

References 26 publications

Design and Control of a 13.2 kV/10 kVA Single-Phase Solid-State-Transformer with 1.7 kV SiC Devices

Design and Control of a 13.2 kV/10 kVA Single-Phase Solid-State-Transformer with 1.7 kV SiC Devices

Studies on a Hybrid Full-Bridge/Half-Bridge Bidirectional CLTC Multi-Resonant DC-DC Converter with a Digital Synchronous Rectification Strategy

Transient Control of Dynamic Inductive EV Charging and Impact on Energy Efficiency when Passing a Roadside Coil Section

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