A Coordinated Charging Strategy for Electric Vehicles Based on Hierarchical Optimization

DOI

10.2991/edep-18.2018.3How to use a DOI?

Keywords

Electric vehicles; hierarchical optimization; peak load shifting; load fluctuation

Abstract

There are many electric vehicles charging stations in distribution network.Uncoordinated charging electric vehicles load is large and changes quickily,it brings risk to the operation of power grid. If taking each station as an independent unit, which will reduce the practicability of the proposed strategy because of the small consideration scope and incomplete information acquisition. Taking all electric vehicles in the distribution network as an object to study will lack the consideration about the differentiation of a single charging stations. Also, controlling all electric vehicles directly through the control center has high demand on reliability. And it is difficult to implement. Given this, the paper used the hierarchical control method to control the electric vehicles in the charging stations and studied charging strategy based on hierarchical optimization. The upper layer used the distribution system load variance as an objective function to establish a model and peak load shifting. The lower level model took the actual charging power deviation and load variance of the charging station into account to reduce the load fluctuation of the charging station. The paper used function fmincon to solve the upper level model and used CPLEX to solve the lower layer model. Finally, using a modified IEEE 33-bus system with 3 EVAs to verify the feasibility of the model and method ,which reduced frequency between the control center and electric vehicles. Also, it cuts peak load and reduces load fluctuations of charging stations.

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Download article (PDF)

TY  - CONF
AU  - Jin-Yong SHI
AU  - Hui-Min KE
AU  - Chong LI
AU  - Jun-Jun SHAO
PY  - 2018/10
DA  - 2018/10
TI  - A Coordinated Charging Strategy for Electric Vehicles Based on Hierarchical Optimization
BT  - Proceedings of the 2018 International Conference on Energy Development and Environmental Protection (EDEP 2018)
PB  - Atlantis Press
SP  - 13
EP  - 21
SN  - 2352-5401
UR  - https://doi.org/10.2991/edep-18.2018.3
DO  - 10.2991/edep-18.2018.3
ID  - SHI2018/10
ER  -