Optimal Scheduling Of Multi-microgrid Cooperative Alliance Considering Demand Response

With the continuous implementation of China’s "double carbon strategy",new energy such as wind power and photovoltaic plays an increasingly important role in the power grid.Microgrid usually includes distributed power generation,energy storage devices and loads,which can flexibly and quickly realize the local utilization of new energy and provide an efficient and convenient platform for users to consume renewable energy.At the same time,it is connected to the distribution network as a flexible controllable unit to save power cost,It has played an important role in reducing pollution,so it has attracted a lot of attention.With the increasing number of adjacent microgrids in the same area,these adjacent microgrids can form a multi microgrid cooperation system through mutual links.The system can realize the mutual benefit of electric energy between microgrids and further save the power cost on the user side.Therefore,the problem of multi microgrid cooperation and the coordination between microgrids and users has become the focus of current research.In order to improve the economy of multi microgrid cooperation alliance and ensure the economic benefits of microgrid and user side,firstly,formulate a reasonable transaction price to ensure the electric energy transaction of microgrid in the region and promote the cooperation alliance,so as to realize the mutual aid of electric energy and improve the economy and new energy consumption rate.In addition,the demand side response behavior of each microgrid should be considered.A two-level optimization model is adopted to take into account the benefits of the cooperative alliance and the user side.The cost of the cooperative alliance is the upper objective function,and the composite function composed of the power cost of the user on the demand side and the unbalanced power on the user side is the lower objective function.The adaptive fireworks algorithm is used to optimize the scheduling of multi microgrid cooperation system combined with the example of adjacent microgrid in an area,which reduces the cost of microgrid cooperation alliance and the power consumption cost on the demand side,and protects the service life of energy storage equipment.When distributing the electric energy of the cooperative alliance,the price constraint strategy and benefit compromise agreement are used to realize the mutual benefit of electric energy between microgrids.The price constraint strategy requires that the transaction price between microgrids must be the average value of the purchase and sale price of the superior distribution network.The benefit compromise agreement requires that each microgrid negotiate with each other,starting from the scheme with the greatest interests of each microgrid,and gradually reduce it until each scheme is unified.The example shows that the proposed scheme can reduce the operation cost of each microgrid and ensure that each microgrid can be accepted.