Capacity Optimization Configuration Of Renewable Energy Supply System Considering AA-CAES Energy Storage

In the dual carbon environment of energy development,CCHP(combined cooling heating and power)with renewable energy becomes more and more important.Research of the mechanism of multi-energy coupling in micro IES(integrated energy system)plays a significant role in low-carbon IES planning and operation problem.After fully considering the advantages of advanced adiabatic compressed air energy storage(AA-CAES)in the micro IES,the configuration and scheduling strategy of the micro IES with Solar photovoltaic/thermal(PV/T)/AA-CAES are optimized,the off-design characteristic of CAES system is considered in the capacity optimization.The main contributions of this thesis are as follows:(1)The model of AA-CAES was established considering its characteristics of the CCHP supply,and the operation constraint set of AA-CAES was established too.The cooling/heating/power load is supplied with the natural gas heating and power combined generation system and Solar photovoltaic/thermal(PV/T).AA-CAES is introduced to the multi-energy flow system as an energy storage device to absorb renewable energy.(2)In this thesis,bi-level programming method is employed to solve the model.Minimizing the total(dispatch cost and fixed cost)cost is the aim of the upper layer.The upper layer optimization algorithm is the Non-dominated Sorting Genetic Algorithm-II(NSGA-II).NSGA-II selects new parent capacity based on the total cost combined with the elitism strategy through cross-mutation of decision variables,and transfers the results to the lower layer,Gurobi solver is adopted in the lower layer to solve the dispatch problem after the results of the upper layer are accepted.The dispatch results will be returned to the upper level auxiliary decision-making.(3 In order to cope with the fluctuation of wind power generation,the off-design characteristic of CAES system is considered.The CAES compression/expansion rated power and the capacity of the air storage carven are determined.With the rapid adjustment ability of CAES the wind power generation-load difference is compensated,and the fluctuation of wind power generation can be smoothed.