MVDC Distribution Grids for Electric Vehicle Fast-Charging Infrastructure

Stieneker, Marco; Mortimer, Benedict J.; Hinz, Arne; Müller-Hellmann, Adolf; Doncker, Rik W. De

doi:10.23919/ipec.2018.8507594

Cited by 19 publications

(18 citation statements)

References 16 publications

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“…The bidirectional power flow capability is another possible feature that converters should have for DC grids interfaces [5], [58]. Required, using FBSMs with non-isolated converters [5], [71], [80], [83] Required, using FBSMs with non-isolated converters [82], [85] Required [86] Unnecessary [92], [93] Required [54], [65], [94] The isolated version of DC-DC converters such as MMC DAB converters is suitable for linking the MVDC to HVDC grids. This topology provides the isolation and the independency of both AC-DC stages.…”

Section: A DC Grids Interconnectionmentioning

confidence: 99%

“…E-Mobility. [92], [100] Depends on DC step ratio and switch connect. [5], [20] Low-High [12], [17], [24].…”

Section: B Offshore Wind Farmsmentioning

confidence: 99%

“…2) High circulating current. [30] 1) DC grids interconnection [97] 2) PV applications [31] 3) E-Mobility [92], [100].…”

Section: B Offshore Wind Farmsmentioning

confidence: 99%

“…4) Control flexibility [8], [9] Extra components result in large size [8], [9], [60]. E-Mobility [92], [100] Medium-High [20] Medium-High [62] IRMMC 1) Soft switching. 2) Inherent voltage balancing of SMs.…”

Section: Cascadedmentioning

confidence: 99%

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Isolated and Nonisolated DC-to-DC Converters for Medium-Voltage DC Networks: A Review

Alhurayyis¹,

Elkhateb²,

Morrow³

2021

IEEE J. Emerg. Sel. Topics Power Electron.

114

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MVDC technology is a promising solution to avoid installation of new AC networks. MVDC can provide optimum integration of large-scale renewable energy sources, the interconnection of different voltage levels of DC and AC grids with the ancillary services. The development in MVDC depends significantly on the DC-DC converters. Such converters support the modern trends of utilising medium-frequency transformers in power networks. Research on isolated converters technology is in its infancy and limited by the conversion ratio and component ratings. Besides, there is no standards exist covering specific aspects of isolated converter product. Thus, a review of such converters is needed. This work presents, for the first time, a review of the DC-DC power converter families in MVDC grids including the leading families which are isolated and nonisolated converters, as well as other subfamilies comparing the specifications and characteristics. Also, the applications of these converters are provided by focusing on the essential requirements for each application. Index Terms-MVDC grids, DC-DC power converters, dual active bridge (DAB), multilevel converter. TABLE I RECOMMENDED CLASSES FOR MVDC VOLTAGE MVDC Class (kV) Nominal Rated Voltage (kV) Maximum Rated Voltage (kV)

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Section: A DC Grids Interconnectionmentioning

confidence: 99%

“…E-Mobility. [92], [100] Depends on DC step ratio and switch connect. [5], [20] Low-High [12], [17], [24].…”

Section: B Offshore Wind Farmsmentioning

confidence: 99%

“…2) High circulating current. [30] 1) DC grids interconnection [97] 2) PV applications [31] 3) E-Mobility [92], [100].…”

Section: B Offshore Wind Farmsmentioning

confidence: 99%

Section: Cascadedmentioning

confidence: 99%

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Isolated and Nonisolated DC-to-DC Converters for Medium-Voltage DC Networks: A Review

Alhurayyis¹,

Elkhateb²,

Morrow³

2021

IEEE J. Emerg. Sel. Topics Power Electron.

114

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“…The medium voltage DC (MVDC) grid has recently created a need for the investigation of the concept of the DC distribution grid [43][44][45]. The overall stability and efficiency of the DC grid are increased by controlling the power flow [26].…”

Section: Connection Of Medium Voltage Grid and Low Voltage Gridmentioning

confidence: 99%

Applications of Triple Active Bridge Converter for Future Grid and Integrated Energy Systems

Pham

Wãda

2020

Energies

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Renewable energy systems and electric vehicles (EVs) are receiving much attention in industrial and scholarly communities owing to their roles in reducing pollutant emissions. Integrated energy systems (IES), which connect different types of renewable energies and storages, have become common in many applications, such as the grid-connected photovoltaic (PV) and battery systems, fuel cells and battery/supercapacitor in EVs. The advantages of all energy sources are maximized by utilizing connection and control strategies. Because many storage systems and household loads are mainly direct current (DC) types, the DC grid has considerable potential for increasing the efficiency of distribution grids in the future. In IES and future DC grid systems, the triple active bridge (TAB) converter is an isolated bidirectional DC-DC converter that has many advantages as a core circuit. Therefore, this paper reviews the characteristics of the TAB converter in current applications and suggests next-generation applications. First, the characteristics and operation modes of the TAB converter are introduced. An overview of all current applications of the TAB converter is then presented. The advantages and challenges of the TAB converter in each application are discussed. Thereafter, the potential future applications of the TAB converter with an adaptable power transmission design are presented.

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Operation-Aware System Design for Synergistic Integration of Regenerative Braking Energy of Railway Systems into EV Fast Charging Stations

Larijani,

Fazel,

Bozorg

et al. 2023

IEEE Access

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Fast charging stations (FCSs) for electric vehicles are associated with large power demands, often coinciding with peak power demands from other consumers. This places significant strain on distribution networks (DNs). To address this issue, this paper proposes a promising method that harnesses the untapped potential of railway systems and wasted regenerative braking energy (RBE) of trains in combination with a battery energy storage system (BESS) to supply EV charging station and participate in the FCS energy supply chain (FCS-ESCH). The proposed integrated approach, as the intermodal sustainable electric transportation system (SETS), aims to reduce the peak power demand of FCSs especially at strategic locations, such as parking areas close to electric railway stations (ERSs) and park and ride areas. To achieve this goal, an operation-aware optimization model is developed that determines the optimal sizes of the interfacing converter and the BESS, while also facilitating optimal energy exchange planning. A generic model for trains' RBE production is proposed and adapted to the operation-aware optimization model to verify the effectiveness of the proposed approach by conducting simulations of a real case study that accurately replicates system behavior with the desired level of precision. Furthermore, sensitivity analyses are performed to explore the impact of varying the power rating of the converters responsible for transmitting RBE to the FCS-ESCH, as well as the per-unit price of BESS energy capacity. The results showcase the potential of employing SETS as an efficient means to mitigate the challenges associated with FCSs, especially peak shaving and cost reductions, paving the way for a more sustainable electric transportation system.

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MVDC Distribution Grids for Electric Vehicle Fast-Charging Infrastructure

Cited by 19 publications

References 16 publications

Isolated and Nonisolated DC-to-DC Converters for Medium-Voltage DC Networks: A Review

Isolated and Nonisolated DC-to-DC Converters for Medium-Voltage DC Networks: A Review

Applications of Triple Active Bridge Converter for Future Grid and Integrated Energy Systems

Operation-Aware System Design for Synergistic Integration of Regenerative Braking Energy of Railway Systems into EV Fast Charging Stations

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