Coordinating Electric Vehicles and Distributed Energy Sources Constrained by User's Travel Commitment

Distributed energy sources including renewable energy (RE) sources and electric vehicle (EV) discharging offer opportunities to improve grid performance. Although uncoordinated EV charging can perfectly meet users' driving needs, it brings great challenges in maintaining the quality of low volt...

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Bibliographic Details
Published in:IEEE transactions on industrial informatics 2022-08, Vol.18 (8), p.5307-5317
Main Authors: Islam, Md Rabiul, Lu, Haiyan, Hossain, M. Jahangir, Li, Li
Format: Article
Language:English
Subjects:
Alternative energy sources
Batteries
Control methods
Controllers
Coordinates
Costs
Current measurement
Discharge
Distributed generation
Electric vehicle charging
Electric vehicles
Energy resources
Energy sources
Hardware
Informatics
Low voltage
neutral current
Neutral currents
Renewable energy
Renewable energy sources
Renewable resources
smart charging
Tariffs
travel requirement
voltage unbalance
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Summary:Distributed energy sources including renewable energy (RE) sources and electric vehicle (EV) discharging offer opportunities to improve grid performance. Although uncoordinated EV charging can perfectly meet users' driving needs, it brings great challenges in maintaining the quality of low voltage (LV) distribution grids. Most existing EV control strategies do not take into account the heterogeneous nature of EV charging, including the various users' travel needs and the intermittent nature of RE sources. This article proposes a hierarchical control method that simultaneously coordinates EV charging by considering a dynamic energy tariff, RE sources, EV hardware characteristics, and particularly the EV's driving needs. The proposed local controller sends the EV's charging priority and required energy to the central controller based on the EV's hardware characteristics and users' driving needs. The central controller then uses this information along with the energy tariff from the retailer and the present grid performance to control EV's charging or discharging power. The efficacy of this hierarchical control method is evaluated using an Australian LV grid. The obtained results show that this method can reduce the neutral current and voltage imbalance with the maximized usage of renewable energy resources while the EV users' driving needs are met.
ISSN:1551-3203
1941-0050
DOI:10.1109/TII.2021.3125462