Reconfigurable low voltage direct current charging networks for plug-in electric vehicles

Mokgonyana, Lesiba and Smith, Kyle and Galloway, Stuart (2018) Reconfigurable low voltage direct current charging networks for plug-in electric vehicles. IEEE Transactions on Smart Grid. ISSN 1949-3053

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    Abstract

    An emerging theme in the development of supporting facilities for plug-in electric vehicles (EVs) is the cost-effective planning and utilisation of charging networks consistent with the uptake of EVs. This paper proposes a low voltage direct current (LVDC) reconfigurable charging network for plugin electric vehicles (EVs) and presents a functional energy management system (EMS) that is capable of planning and operating the charging network to minimise charging cost and to facilitate progressive infrastructure deployment based on EV demand. The charging network is connected to the main AC grid through one or more centralised AC/DC converters that supply a high power charge to EVs connected to the DC side of the converters. The EMS accommodates multiple parking bays, charging sources, AC constraints, non-linear EV battery loads and user charging requirements with a novel approach to managing user inconvenience. The inconvenience model is founded on the presence of user flexibility i.e., an allowance on charging time or battery SOC, providing the capability to increase asset utilisation and enable access for additional network users. Through a series of case studies and a stochastic forecasting approach, the reconfigurable network and EMS demonstrate the capacity to achieve savings over fixed AC and sequential DC systems.

    Creators(s): Mokgonyana, Lesiba ORCID logoORCID: https://orcid.org/0000-0002-2757-4261, Smith, Kyle ORCID logoORCID: https://orcid.org/0000-0002-5833-6880 and Galloway, Stuart ORCID logoORCID: https://orcid.org/0000-0003-1978-993X;
    Item type:Article
    ID code:66942
    Notes:© 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting /republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
    Keywords:plug-in electric vehicles, direct current charging systems, mixed-integer programming, charging infrastructure, multiple charger control, Electrical engineering. Electronics Nuclear engineering, Electrical and Electronic Engineering
    Subjects:Technology > Electrical engineering. Electronics Nuclear engineering
    Department:Faculty of Engineering > Electronic and Electrical Engineering
    Strategic Research Themes > Energy
    Strategic Research Themes > Measurement Science and Enabling Technologies
    Depositing user: Pure Administrator
    Date deposited:13 Feb 2019 11:11
    Last modified:27 May 2020 00:56
    URI:https://strathprints.strath.ac.uk/id/eprint/66942
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