| Large-scale energy storage is considered to be one of the most effective means to solve large-scale new energy accommodation and improve the economic and reliability of power system.Among various energy storage technologies,advanced compressed air energy storage(CAES)has the advantages of low cost,long life,large capacity,safe,environmentally friendly,and the ability of multi-type energy storage and supply,so it has attracted great attention.In recent years,a series of advanced CAES demonstration plants operated successfully,which greatly promoted the development of advanced CAES technology’s industrialization process.However,advanced CAES technology is still in the stage of engineering demonstration.There is a lack of optimal planning methods for advanced CAES plant.Before large-scale construction of advanced CAES plant,it is necessary to make reasonable planning to take full advantage of advanced CAES plant and avoid waste of resources.Therefore,it is urgent to carry out research on the optimal planning method of advanced CAES plant.In view of this,comprehensively considering the technical characteristics of advanced CAES and the diverse needs of different application scenarios,this paper studies the advanced CAES plant optimal planning method in multiple scenarios laying a theoretical foundation for the application and promotion of advanced CAES technology in power systems and integrated energy systems.The main research of this paper includes:(1)Aiming at the scenario of centralized access to the power system,an advanced CAES plant optimal planning method considering the variable life characteristics is proposed.The method can accurately calculate the service life of advanced CAES plant to obtain an accurate planning scheme which has guiding significance for the commercial application of large-scale advanced CAES plant.Firstly,the main factors that affect the life of advanced CAES plant are studied,and the variable life model of advanced CAES plant is established.Then,a bi-level optimal planning model of advanced CAES plant is established.Finally,the validity of the bi-level optimal model is verified by numerical example simulation.The simulation results show the effect of considering the variable life characteristics on the accuracy of the advanced CAES plant’s planning results.(2)Aiming at the scenario of distributed access to power system,the modelling and optimal planning method of hybrid advanced CAES plant is proposed.The method has important theoretical reference value for further expanding the application scenarios of advanced CAES technology.Firstly,combined with the characteristics of advanced adiabatic compressed air energy storage and liquid air energy storage,the basic architecture of centralized-distributed hybrid advanced CAES plant is constructed.Then,the energy flow,conversion and loss model of each process in the hybrid advanced CAES plant are established.On this basis,a hybrid advanced CAES plant optimal planning method is proposed.Finally,the effectiveness of the hybrid advanced CAES plant optimal planning method is verified by simulation.(3)Aiming at the application scenario of large-scale integrated energy system,an integrated energy system optimal planning method considering the combined cooling,heating and power characteristics of the advanced CAES plant and its multi-energy reserve capacity is proposed.This method can promote the application and popularization of advanced CAES plant in integrated energy system.Firstly,considering the combined cooling,heating and power characteristics of the advanced CAES plant,the basic architecture and optimal planning model of the integrated energy system is established.Then,the mathematical model of the main equipment is established.On this basis,the optimal scheduling model considering the multi-energy reserve constraints is established.Finally,the economics of advanced CAES plant,power-to-gas device,battery in the integrated energy system is compared and analyzed.(4)Aiming at the application scenario of urban integrated energy system,an optimal planning method of advanced CAES plant is proposed to co-optimize the economy and reliability of urban integrated energy system.The method can give full play to the ability of advanced CAES plant in improving system reliability.Firstly,a bi-level optimal framework of advanced CAES plant is constructed to co-optimize the economy and reliability of urban integrated energy system.Secondly,the optimal objective function of economy and reliability is established,and the reliability objective is transformed to uniformly analyze the economy and reliability of the system in the planning level.Thirdly,considering the influence of fault state and actual operation limit on equipment,the dispatching model of urban integrated energy system is established.Finally,the effectiveness and superiority of the optimal planning method is verified by simulation. |
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