Capacity Optimization Configuration Of Generations Based On Cooperative Game And Demand Response For Microgrid

In response to climate change,Chinese government had put forward the goal of "strive to peak carbon dioxide emissions by 2030 and strive to achieve carbon neutrality by 2060".Increasing the proportion of clean energy power generation such as wind and solar is one of the important ways to achieve this goal.As a power system with a high penetration rate of new energy,microgrid will play an important role in achieving the goal of " carbon peaking and carbon neutrality ".The rational configuration of the power supply capacity in the microgrid is the basis for realizing and satisfying the safe and stable economic operation of the microgrid.Therefore,it is of great significance to carry out the research on the optimal configuration of the power supply capacity of the microgrid.According to whether it can be connected to the grid,microgrids can be divided into two types: grid-connected microgrid and independent microgrid.Considering that the two types of microgrids have different characteristics,this paper studies the optimal configuration of microgrids from two aspects: grid-connected microgrid and independent microgrid.The main work contents are as follows:Aiming at the uncoordinated planning of the microgrid and the distribution network caused by the unreasonable distribution of interests between the two operators of the microgrid and the distribution network during the construction and operation of the grid-connected microgrid,a method for optimizing the power supply capacity configuration of grid-connected microgrids based on cooperative game is proposed.Firstly,the cooperative game relationship between microgrid operators and distribution network operators is analyzed in terms of the optimal configuration of power supply capacity in grid-connected microgrids.Secondly,the optimal configuration of microgrid power supply capacity under the cooperative game is constructed.The model includes two modes: alliance and non-alliance.Finally,the model is solved by using the solution idea based on layered thinking.The results of the calculation example show that the microgrid operator and the distribution network operator reach a cooperative alliance to make decisions on the capacity of each power source in the microgrid and formulate a reasonable profit distribution method to distribute the total income of the alliance,which can benefit both parties and help to increasing the profitability of microgrids.For stand-alone microgrids,aiming at the problem of how to improve the economy as much as possible under the premise of ensuring the reliability of power supply when the capacity configuration of stand-alone microgrid is optimized,an optimal configuration method for stand-alone microgrid with pumped heat energy storage（PHES）considering source-load uncertainty and incentive demand response（DR）is proposed.Firstly,the basic structure of stand-alone microgrid with PHES is introduced.On this basis,the working principle of PHES is explained and the simplified mathematical model of PHES is established.Secondly,uncertain scenarios are built based on robust optimization method.Then,a bi-level robust optimization model of capacity configuration considering demand response is established.Finally,the model is solved by using the genetic algorithm combined with mixed-integer linear programming.The example results show that,PHES,a new type of energy storage with low cost and not restricted by geographical conditions,instead of the high-cost battery energy storage as the system’s energy storage can further improve economy,and considering the influence of the combination of source-load uncertainty and DR on the configuration results,the independent microgrid optimal configuration model can be improved to make the configuration results more reasonable.