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Performance Evaluation of Large-Scale Charge Spot Networks for Electric Mobility Services

Authors:
Christian Lewandowski
Stephan Haendeler
Christian Wietfeld

Keywords: Electric Mobility; Charge Point Networks; Powerline Communications (PLC); IEEE 802.11g

Abstract:
Today’s public charge points for Electric Vehicles (EV) are equipped with numerous ICT components for communication with vehicle and back-end systems for authentication, billing and invoicing. The rollout of EVs will inevitably lead to a higher demand for charging infrastructure and will increase the operational and management costs for operators. In order to minimize costs, this paper evaluates applicable local networking technologies for large scale charge point scenarios and takes into account IEEE 802.11g, IEEE 802.3 and Homeplug GreenPHY, which is currently discussed in the ISO/IEC Joint Working Group for defining the Vehicle 2 Grid Communication Interface where TU Dortmund is an active member. A Web-Service based Charging Process Protocol for data exchange between all involved entities is presented to determine the data rates for XML and EXI encoded packet transmission. The V2G communication between EV and charge point is analyzed as well as the goodput for backend communication. For this, hubs including data concentration are proposed to minimize billing data amount for the clearing center. For examination of the possible charge point network size, an overview of current predictions for EVs is given and the proposed system is evaluated within a parking area at TU Dortmund, where we expect the installation of 61 charge points by 2030. With optimization of the presented load coordination service, the data rate in the charge point network could be reduced by 99.8 %.

Pages: 242 to 247

Copyright: Copyright (c) IARIA, 2011

Publication date: October 23, 2011

Published in: conference

ISSN: 2163-9027

ISBN: 978-1-61208-166-3

Location: Barcelona, Spain

Dates: from October 23, 2011 to October 29, 2011