Resilience-Oriented Energy Management for Multiple Microgrids Coalition Based on a Cooperative Game Theory Model

In this paper, the resilience-oriented energy management of the multiple microgrids is followed. For this purpose, a three levelgame theory based model is developed for energy management of microgrids. In this model, the coalition between the microgrids is formed to achieve optimal cumulative energy management considering the resilience concept. In this model, at first, a bi-level problem is developed from the perspective of the central operator to determine the optimal energy trading between the upstream network and multiple microgrids. The proposed bi-level model is formulated as a mathematical program with equilibrium constraints (MPEC) problem. In the bi-level problem, an optimization problem is formulated in the upper level from the perspective of the whole coalition. Therefore, minimizing the operating cost of the entire coalition is considered as the objective function. The lower level of the problem is also modeled from the point of view of each microgrid. In order to resilience-oriented model the energy management problem, the possibility of disconnecting the coalition connection line with the upstream network is probabilistically modeled based on the scenarios. After solving the MPEC problem and determining the energy exchanges, the local microgrids are operated separately from the perspective of the local operator in the third level.In this way, the operational statues of the electrical units as well as the energy storage systems are determined.The results of the simulations show that by using the method proposed in this article, with the presence of energy storage systems, the interrupted load and also the operating cost in the resilient mode will be equal to the normal mode.Also, the studies demonstrate using the proposed three-level model, the total cost is reduced by about 5.7 for the normal mode and about 7% for the resilience mode compared to the conventional two-level model.