Connection of very large public charging station to the HV transmission grid

Palone, F.; Rebolini, M.; Gentili, S.; Giannuzzi, Giorgio Maria; Schembari, M.; Lauria, S.

doi:10.1109/eeeic.2015.7165350

Cited by 3 publications

(5 citation statements)

References 5 publications

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“…x l,a = 1 (7) Allocation to an arm with an empty cell is ensured by a constraint, given by ( 8), with B l,a being the number of cars in the MMC arm (l, a) before the allocation. The number of cars cannot exceed the number of cells, N , after the allocation of the new car:…”

Section: B Optimized Allocationmentioning

confidence: 99%

“…will potentially accommodate a large number of charging nodes. Several works in the literature investigated large-scale EV charging applications considering various aspects such as demand response management [5], charging profile optimization [6], and network reinforcement requirements due the harmonic emissions [7]. On the other hand, the literature lacks studies that investigate the most suitable topology.…”

Section: Introductionmentioning

confidence: 99%

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Optimized Allocation of Loads in MMC-based Electric Vehicle Charging Infrastructure

Gümrükcü

Ponci

Monti

et al. 2020

2020 IEEE International Conference on Power Systems Technology (POWERCON)

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Utilization of the modular multilevel converter (MMC) topology can enable transformer-less interfacing between electric vehicle (EV) charging infrastructure and the power distribution grid. Such configurations are claimed to significantly reduce the system costs, space requirements and complexity for high-power charging facilities. On the other hand, ensuring the correct operation of such system is challenging under unevenly distributed loads in the MMC arms. Proper selection of the charging points to allocate the EVs can limit the loading unbalances between the arms and phases of the MMC system. This paper presents two load allocation strategies. The first strategy takes only the present loading into account, while the second one optimizes the decision according to the individual energy demands of the EVs over time. Simulations demonstrated that the optimized strategy minimizes loading unbalances between the MMC phases and arms during the charging operations. Furthermore, it can contribute to larger demand fulfillment.

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Section: B Optimized Allocationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimized Allocation of Loads in MMC-based Electric Vehicle Charging Infrastructure

Gümrükcü

Ponci

Monti

et al. 2020

2020 IEEE International Conference on Power Systems Technology (POWERCON)

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“…However, this paper did not consider infrastructure requirements and only considered charging services against costs. Other work in this area [30] looked at the impact of up to 4500 vehicles (450 MW) within a large shopping centre on the electrical grid system at HV. Two different connections to the 220 kV Network were considered and the car park was aggregated as a fixed load on recharge only.…”

Section: Introductionmentioning

confidence: 99%

Feasibility study: investigation of car park‐based V2G services in the UK central hub

Strickland

Embley

Osborne

et al. 2019

J. eng.

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“…Electrification of road transport is an essential step towards reaching national and international targets for reduction of CO2 emissions. An increasing number of electric vehicles (EVs) resulting from this development trend is expected to generate a need for large-scale EV charging facilities [1], [2]. Such infrastructures should be capable of simultaneously charging several hundreds, or even more than a thousand, EVs and will require high-power installations in the multimegawatt range [2]- [6].…”

mentioning

confidence: 99%

“…An increasing number of electric vehicles (EVs) resulting from this development trend is expected to generate a need for large-scale EV charging facilities [1], [2]. Such infrastructures should be capable of simultaneously charging several hundreds, or even more than a thousand, EVs and will require high-power installations in the multimegawatt range [2]- [6]. Especially for large residential parking areas in space-constrained urban areas, the compactness of the electrical installations can be of critical importance.…”

mentioning

confidence: 99%

Load Balancing of a Modular Multilevel Grid-Interface Converter for Transformer-Less Large-Scale Wireless Electric Vehicle Charging Infrastructure

Guidi

D’Arco

Nishikawa

et al. 2021

IEEE J. Emerg. Sel. Topics Power Electron.

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This paper analyses the requirements for load balancing of a new transformer-less grid interface topology for large-scale electric vehicle (EV) charging infrastructures. The proposed configuration utilizes a Modular Multilevel Converter (MMC) to supply wireless EV chargers from each module. The inherent galvanic isolation provided by wireless inductive power transfer and the scalability of the MMC topology enable transformer-less connection to medium voltage (MV) distribution grids. This can reduce the footprint and copper volume of the internal power distribution for the parking infrastructure. The load distribution within the MMC topology depends on the location and power requirements of each EV to be charged. Requirements for load balancing by controlling the internal circulating currents of the proposed topology when supplying unevenly distributed loads are derived. It is also demonstrated how a second harmonic component of the circulating currents can be utilized to ensure balancing capability within each MMC arm, and how its required amplitude depends on the load distribution. The theoretical analysis and the performance of a corresponding control strategy are first verified by time-domain simulations of a large-scale infrastructure. Experimental results from a small-scale prototype based on an MMC where each arm has 12 modules with individual controllable loads are presented.

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Connection of very large public charging station to the HV transmission grid

Cited by 3 publications

References 5 publications

Optimized Allocation of Loads in MMC-based Electric Vehicle Charging Infrastructure

Optimized Allocation of Loads in MMC-based Electric Vehicle Charging Infrastructure

Feasibility study: investigation of car park‐based V2G services in the UK central hub

Load Balancing of a Modular Multilevel Grid-Interface Converter for Transformer-Less Large-Scale Wireless Electric Vehicle Charging Infrastructure

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