Optimal Scheduling Of Source-Load-Storage Microgrids Considering Demand Response

With the rapid development of human society,the shortage of traditional fossil energy and environmental pollution are becoming more and more prominent,and renewable energy generation technologies are gaining more and more attention.Microgrid(MG)combines multiple distributed power sources into one,which can give full play to the advantages of distributed power generation,make full use of renewable energy and improve the reliability of power supply,and has significant engineering value.The rational dispatch of multiple types of distributed power sources within a microgrid is important to ensure the safe operation of the microgrid,reduce operating costs and promote the sustainable development of the microgrid.In order to make full use of the multiple types of resources on both the supply and demand sides of the microgrid and to achieve the optimal economic dispatch of the microgrid,this paper investigates the optimal dispatch of source-load-storage microgrid considering demand response.(1)To address the problem that the demand response capability of the user-side load of the microgrid is not reasonably utilized,the user-side load characteristics of the microgrid are studied,the thermal load PMV index is introduced,the user-side response load is divided into two categories of interruptible load and transferable load according to the user-side electricity consumption characteristics,the user electric and thermal load demand response models and the electric-thermal coupling response model are established respectively,and a comprehensive consideration of the electric load The customer satisfaction index which takes into account the satisfaction of electric load and thermal comfort is proposed.Through experimental comparison and analysis,it is found that customer-side participation in demand response can reduce the cost of electricity consumption,and the microgrid side can improve the system operating profit by scheduling customer-side demand response.(2)A two-tier economic dispatch model of MG-LD considering the dynamic pricing mechanism of the upper and lower layers is proposed for the problem of global and local coordination and optimal dispatch of microgrids.Based on the consideration of customer satisfaction index and economic dispatch of microgrid,the two-tier optimization theory is applied to the field of optimal dispatch of microgrid,and a dynamic pricing mechanism is established.The objective of the upper model is to maximize the comprehensive operating revenue of the microgrid,and the lower model is to minimize the operating cost of the microgrid system.The model is highly accurate,especially in considering the independence between the objective functions and achieving the overall optimality.(3)An improved manta ray foraging optimization algorithm is proposed to address the problem of limited search capability of the manta ray foraging algorithm in microgrid optimal scheduling,which easily falls into local optimum.By introducing the ICMIC chaotic sequence,T-distribution and Levy flight strategy,the quality of the initial solution is improved,the local and global search performance of the algorithm is balanced,its ability to jump out of the local optimum is enhanced,and the diversity of the population and the convergence speed are increased.A grid-connected microgrid simulation model is built using MATLAB and the algorithm is tested in conjunction with an arithmetic example.The improved manta ray algorithm effectively improves the economic optimization of the microgrid.