Coordinated charging and discharging control of electric vehicles to manage supply voltages in distribution networks: Assessing the customer benefit

2021 ◽  
Vol 291 ◽  
pp. 116857
Author(s):  
Nanduni I. Nimalsiri ◽  
Elizabeth L. Ratnam ◽  
Chathurika P. Mediwaththe ◽  
David B. Smith ◽  
Saman K. Halgamuge
Keyword(s):  
Electric Vehicles ◽  
Distribution Networks ◽  
Supply Voltages ◽  
Coordinated Charging

scholarly journals An Online Coordinated Charging/Discharging Strategy of Plug-in Electric Vehicles in Unbalanced Active Distribution Networks with Ancillary Reactive Service in the Energy Market

Energies ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1350 ◽  
Author(s):  
Nasim Jabalameli ◽  
Xianging Su ◽  
Sara Deilami
Keyword(s):  
Electric Vehicles ◽  
Reactive Power ◽  
Distribution Networks ◽  
Energy Market ◽  
Voltage Unbalance ◽  
Voltage Drops ◽  
Node Voltage ◽  
Coordinated Charging ◽  
Western Australian ◽  
Active Distribution Networks

The global acceptance and off-grid charging of plug-in electric vehicles (PEVs) are expected to grow tremendously in the next few years. Uncoordinated PEV charging can cause serious grid issues such as overloading of transformers and unacceptable voltage drops. Single-phase residential charging can also initiate or contribute to voltage unbalance conditions in the distribution networks. A potential solution and key challenge for PEV integration is shifting of the charging activities to off-peak periods. This paper proposes a new PEV coordination approach based on genetic algorithm (GA) optimization to perform online centralized charging and discharging considering transformer loading and node voltage magnitude and unbalance profiles. It allows PEV as source of active and reactive power to participate in energy market based on different prices during a day, without any degradation. Finally, the impacts of uncoordinated and the proposed GA coordinated PEV charging/discharging strategy are simulated for a real unbalanced Western Australian distribution network in the Perth solar city over 24 h.

Review of Research on Coordinated Charging of Electric Vehicles

2013 ◽  
Vol 860-863 ◽  
pp. 1164-1172 ◽  
Author(s):  
Feng Ni ◽  
Zhi Jian Liu ◽  
Hao Zhang ◽  
Shuo Liu ◽  
Feng Wu
Keyword(s):  
Electric Vehicles ◽  
Peak Shift ◽  
Frequency Regulation ◽  
Time And Space ◽  
Control Effectiveness ◽  
Electric Vehicle Charging ◽  
Electric Car ◽  
New Energy ◽  
Coordinated Charging ◽  
Dual Scale

With the development of technologies of large capacity batteries and electric vehicles, the number of electric-car will increase dramatically. As a result, disorderly charging will cause a significant impact on the safe and economic operation of power system. Charging load has its adjustability on dual scale of time and space. With this feature, load dispatch in both time and space for dual scale is possible which has a positive effect on the operation of power grid. This paper introduces some recent research achievements on orderly charge control, including electric vehicle charging demand characteristics and load model. Explores the orderly charging, especially the control effectiveness of V2G mode on cases of peak-shift, coordinated operation of new energy, frequency regulation and other aspects. Orderly control strategy for electric vehicles is also put forward. Finally, points out the deficiencies of current research and prospects for future.

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