多微电网参与下的配电侧直接电能交易纳什议价模型

Nash bargaining model for direct electricity trading on distribution side with multi-microgrids participation

随着售电侧电力市场改革的不断深入,研究多微电网参与下的配电侧直接电能交易具有重要意义。针对多微电网与负荷聚合商之间的直接电能交易,以各主体在传统交易方式下的最优效益作为谈判破裂点,提出了一种基于合作博弈论的纳什议价模型,模型中博弈参与者可获得帕累托最优效益。模型为非线性非凸问题,不易直接求解,将其分成求解支付和联盟效益最大化两个子问题。为保护交易主体内部隐私,联盟效益最大化问题采用交替方向乘子法进行分布式求解,交易双方在求解过程中仅需相互交换期望的交易电量。仿真结果表明该模型可以有效地提升交易双方的运营效益。

With the deepening reform of the electricity market in the retail side, it is of great significance to study the direct electricity trading on the distribution side with the participation of multimicrogrids. In this paper, a Nash bargaining model based on cooperative game theory is proposed to deal with the direct electricity transaction between multi-microgrid and load aggregator, taking the optimal benefit of each participant under the traditional transaction mode as the disagreement point of bargaining, so that the participants of the game can obtain Pareto optimal benefit. The model is a non-linear and non-convex problem, which is difficult to solve directly. Therefore, it is divided it into two sub-problems: solving payment and maximizing alliance benefits. In order to protect the privacy of each agent, the maximizing alliance benefits uses alternating direction method of multiplier to solve the distributed optimization problem. In the process of solving the model, only the expected transaction power is exchanged between the two parties. The simulation results show that the model can effectively improve the operational efficiency of both sides of the transaction.