Journal
IEEE SYSTEMS JOURNAL
Volume 13, Issue 1, Pages 854-863Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSYST.2018.2855971
Keywords
Decentralized mean-field charging coordination; plug-in electric vehicle (PEV); state of charge (SoC); state of health (SoH)
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Funding
- Iran National Science Foundation [96010862]
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This paper develops a decentralized competitive charging coordination algorithm for a large population of plug-in electric vehicles (PEVs) using the concept of a mean-field (MF) game. The aim of each PEV is to find its optimal charging strategy by minimizing an objective function consisting of charging cost, battery degradation cost, and benefit from charging, subject to the input and state constraints. The strategy of a PEV affects the objective functions of other PEVs through the electricity price, and therefore, we can model the interactions among PEVs as a game problem. No information exchange is considered among the PEVs. Each PEV only sends its own control action value to a population coordinator, and the coordinator just broadcasts a common signal to all the PEVs. This common signal is an estimate of the average control actions of PEVs and is called the MF term. Utilizing an adjustment mechanism for theMF term, a decentralized MF-optimal control algorithm is proposed, and it is shown that the algorithm converges to the epsilon(N) - Nash equilibrium point of the game, with eN uniformly converging to zero as the population sizes of the PEVs go to infinity. Simulation results and comparison with other methods are performed to clarify the advantages of the proposed method.
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