A DC&amp;#x2013;DC Multiport Module for Integrating Plug-In Electric Vehicles in a Parking Lot: Topology and Operation

This paper proposes a multiport dc-dc autotransformer (multiport dc auto) that is used to interconnect multiple HVDC systems with different voltage levels. The multiport dc auto is able to reduce 50%-80% the converter cost compared with conventional dc-ac-dc technology. Different from the conventional dc-ac-dc technology using magnetic coupling at the ac sides of the converters, there is direct electrical connection between the interconnected dc systems in the multiport dc auto. Such direct electrical interconnection significantly reduces the used power converters in the multiport dc auto. Taking interconnecting a ±250kV, ±320kV and ±400kV dc system with the rated exporting/importing dc power at each of the dc system being 500MW, 1000MW and 1500MW as an example, the conventional multiport dc-ac-dc technology requires a total of 3000MW power converters while only 775MW power converter is required in the multiport dc-dc autotransformer. The required power converter in the multiport dc-dc autotransformer is only 26% of the converter used in the conventional multiport dc-ac-dc technology. Cost and operating power loss is therefore significantly reduced.

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“…For (22), if P 2 and P 3 are in the same direction, P 1 of the opposite direction and (25) is satisfied, P VSC3 reaches its maximum value.…”

Section: Dimensioning Of the Power Rating Of Vsc Converters From Tmentioning

confidence: 99%

Multiport DC–DC Autotransformer for Interconnecting Multiple High-Voltage DC Systems at Low Cost

Lin

Wen

Cheng

2015

IEEE Trans. Power Electron.

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“…The fully isolated topology is realised by full-bridge or half-bridge or series resonant topology connected by means of magnetic coupling. This study proposes an integrated three-port full-bridge converter to interface PV system, energy storage device, and the load (Rezaee and Farjah, 2014;Anno and Koizumi, 2015;Hu et al, 2015). The output power, which is controlled by means of voltage mode control in the multiport converter, is quite deterministic due to the nonlinear characteristics and complex feedback loops.…”

Section: Introductionmentioning

confidence: 99%

Analysis of controllers for the dynamic response enhancement of the three-port full-bridge DC-DC converter interfacing photovoltaic system

Mahendran¹,

Ramaprabha²

2017

IJAAC

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Multiport DC-DC converters have been most commonly used in stand-alone renewable power systems to provide smooth and constant power to the loads. To supply the load without any interruption under various disturbances, the centralised controller in various typologies of multiport converter has been implemented only by using conventional proportional integral (PI) controller. This study presents the output voltage control of the three-port full-bridge converter interfacing photovoltaic (PV) system with three different controllers. The dynamic response of the proposed converter is analysed with the PI controller, fuzzy logic controller (FLC), and the sliding mode controller (SMC). The state space model of the three-port full-bridge converter is developed to analyse the performance using SMC. PI, FLC, and SMC-based control scheme is developed using the MATLAB/Simulink environment. The response of the PI, FLC, and SMC are analysed for line regulation, load voltage regulation, and for the converter parameter variation. The simulation results illustrate that the SMC gives a better steady state and dynamic response when compared with the PI and FLC. The results are presented to confirm the proposed control schemes.Keywords: power converter; fuzzy control; PI control; renewable energy sources; sliding mode control; state-space methods.Reference to this paper should be made as follows: Mahendran, V. and Ramabadran, R. (2017) 'Analysis of controllers for the dynamic response enhancement of the three-port full-bridge DC-DC converter interfacing photovoltaic system', Int.

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“…In this approach, transient stability retains its original definition and EV charging demand is integrated as part of the load. The second approach considers inclusion of power electronic converters whereby an EV aggregator model [15][16][17][18][19][20] is integrated and used during fault conditions [21][22]. In this latter approach, transient stability is defined as the capability of the EV aggregator -which is considered as a virtual power plant (VPP) -to remain in synchronous operation with the bulk power system and maintain the voltage level (and stability) within acceptable limits following large disturbances and typical faults.…”

Section: Introductionmentioning

confidence: 99%

Assessment of transient stability support for electric vehicle integration

Zhou

Littler

Meegahapola

2016

2016 IEEE Power and Energy Society General Meeting (PESGM)

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A DC–DC Multiport Module for Integrating Plug-In Electric Vehicles in a Parking Lot: Topology and Operation

Cited by 37 publications

References 31 publications

Multiport DC–DC Autotransformer for Interconnecting Multiple High-Voltage DC Systems at Low Cost

Multiport DC–DC Autotransformer for Interconnecting Multiple High-Voltage DC Systems at Low Cost

Analysis of controllers for the dynamic response enhancement of the three-port full-bridge DC-DC converter interfacing photovoltaic system

Assessment of transient stability support for electric vehicle integration

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