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Local Versus Centralized Charging Strategies for Electric Vehicles in Low Voltage Distribution Systems

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3 Author(s)
Richardson, P. ; Sch. of Electr., Electron. & Commun. Eng., Univ. Coll. Dublin, Dublin, Ireland ; Flynn, D. ; Keane, A.

Controlled charging of electric vehicles offers a potential solution to accommodating large numbers of such vehicles on existing distribution networks without the need for widespread upgrading of network infrastructure. Here, a local control technique is proposed whereby individual electric vehicle charging units attempt to maximise their own charging rate for their vehicle while maintaining local network conditions within acceptable limits. Simulations are performed to demonstrate the benefits of the technique on a test distribution network. The results of the method are also compared to those from a centralized control method whereby EV charging is controlled by a central controller. The paper outlines the advantages and disadvantages of both strategies in terms of capacity utilization and total energy delivered to charging EVs.

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Smart Grid, IEEE Transactions on  (Volume:3 ,  Issue: 2 )