Research On The Optimal Allocation-operation Strategy Of Regional Integrated Energy System

Regional integrated energy systems provide special advantages in regard to the usage of new energy and can marry several energy flow networks,realize the complementarity between various energy networks,and increase total energy utilisation rates.The planning strategy and calculation outcomes of regional integrated energy systems have an impact on their benefits in the context of the rapid development of integrated energy systems.Consequently,in order to maximise the benefits of the regional integrated energy system,it is crucial to conduct research on the configuration-operation strategy of the system and to rationally plan the equipment capacity configuration and equipment output operation mode of the system.The following research is done regarding the regional integrated energy system in this thesis.Firstly,this thesis divides the structure of the regional integrated energy system into input side,intermediate conversion equipment,and load side;the input side includes wind power generation,photovoltaic power generation,and solar thermal power station;the intermediate conversion equipment includes cold,heat and power units,gas boilers,and electric chillers;and in order to improve the consumption efficiency,this structure is divided into load side.In order to ensure the efficient operation of the equipment,the variable operating characteristics of the gas turbine mathematical model and the absorption chiller mathematical model are modelled and analysed,respectively;the load side includes four types of loads: cold,heat,electricity,and gas,thereby constructing a comprehensive regional integrated energy system structure.Then,based on the system structure,a two-layer optimisation model is built,in which the upper layer solves the optimal capacity configuration with the goal of optimal investment cost,and the lower layer solves the equipment operating output with the goal of optimal system operating cost,and an improved whale algorithm mixed integer linear programming solution method is used to obtain the optimal capacity configuration of the system.Following that,this thesis considers the impact of sourceload uncertainty on the system capacity configuration and solves the two-layer optimisation model using the improved whale algorithm-interval linear programming method to solve the source-load uncertainty problem,where the upper and lower objective functions are consistent with the deterministic case,and the uncertain and uncertain objective functions are consistent with the uncertain and uncertain case.The results of the uncertainty and deterministic allocations are compared and analysed,and the system capacity allocation appears to fluctuate in different sizes after taking into account the influence of uncertainty factors,providing a certain reference for the regional integrated energy systems allocation strategy.Lastly,the deterministic planning model and solution method are incorporated into the regional integrated energy system operating model,and the demand response incentive mechanism and carbon trading mechanism are discussed.The four types of loads in the regional integrated energy system are divided into curtailable loads and substitutable loads,and the lower operation model is aimed at optimal operation economy and low carbon,and four scenarios are established to research the economic operation cost and carbon trading,and the arithmetic examples verify that the used model and the optimized operation strategy effectively improve the system economy and low carbon.