期刊
IEEE TRANSACTIONS ON SMART GRID
卷 8, 期 5, 页码 2358-2369出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TSG.2016.2524020
关键词
Plug-in hybrid electric vehicle (PHEV); vehicle-to-grid (V2G); frequency regulation; decentralized control; game theory
This paper proposes a holistic framework for plug-in hybrid electric vehicles (PHEVs) to participate in frequency regulation in a competitive electricity market. It is challenging to use PHEVs as frequency regulation units since conflicts of interests exist among PHEVs, aggregators, and transmission system operator (TSO). PHEVs are also facing various uncertainties from power prices and the available regulation capacities. These challenges motivate us to model the system using a hierarchical game. At the upper level of the hierarchical game, the frequency regulation capacity bids of aggregators are formulated as a non-cooperative game. Based on the frequency regulation prices obtained from the non-cooperative game, we formulate a Markov game to coordinate the charging process of PHEVs at the lower level. The Markov game will optimize the regulation capacity of the aggregator and strengthen its ability in bidding a more favorable frequency regulation price in the upper level game. Thus, the benefits are well coordinated among PHEVs, aggregators, and TSO in the proposed game-theoretic framework. Furthermore, the uncertainties from power prices and available regulation capacities are elegantly handled by the proposed noncooperative game and Markov game, respectively. Finally, various simulations are carried out to validate the effectiveness of the proposed hierarchical game approach.
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