Beta 1

Title Charging strategies for plug-in hybrid vehicles
Author Wallin, Mattias
Supervisor Poulsen, Niels Kjølstad (Mathematical Statistics, Department of Informatics and Mathematical Modeling, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark)
Institution Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark
Thesis level Master's thesis
Year 2008
Abstract At Risø DTU a Toyota Prius has been equipped with a battery that gives the car a range of approximately 50 km on electricity only and thereby been converted from a hybrid electrical vehicle, HEV, to a plug-in hybrid electrical vehicle, PHEV. Changes in supply and demand on the wholesale power market are re ected in the electricity price level and if PHEV users select to charge in periods of lower price it will affect their total cost of charging and by that the cost per driven kilometre. This report investigates the effect of a few different charging strategies on the charging cost to a user that faces variable electricity prices. The traditional way of recharging a battery is to plug it in and to switch on the charger immediately and then to dissconnect the charger when the battery is fully charged. This scenario will be used as a reference in terms of charging cost. For scheduled charging under a time period between plug-in and unplugging of the vehicle to the grid the electricity prices during different time steps of this period must be either known or forecast. Focus in this report is on the characteristics of the components involved in a system for automated vehicle charging and potential approaches to the charging strategy. The numerical findings suffer from a simple and non-adaptive forecast model and anomalous behaviour of an optimisation function. It can however be seen that the more elaborate optimisation models that could be calculated did produce a lower charging cost than their more simple counterparts.
Series IMM-M.Sc.-2008-46
Original PDF ep08_46.pdf (13.99 MB)
Admin Creation date: 2008-06-04    Update date: 2008-08-29    Source: dtu    ID: 220595    Original MXD