Study On Optimal Configuration Of Integrated Energy System Considering Heat Supply Network Planning

With the increasing demand for energy by social development,the massive consumption of traditional fossil energy has brought environmental problems that can not be ignored.The limitation of fossil energy forces mankind to find a new energy outlet.Promoting the transformation of energy consumption and developing energy Internet has become the only way to solve the current world energy crisis and environmental degradation.As the terminal unit of the new energy system in the current energy Internet environment,integrated energy system(IES)takes the power system as the core,Internet and communication technology as the basis,distributed renewable energy as the main primary energy,and closely coupled with natural gas network,transportation network and other systems to form a multi energy flow system,which can effectively realize the coupling,complementarity and efficient utilization of different forms of energy;However,there are many different forms of energy conversion and storage equipment.How to coordinate and optimize the allocation of various equipment capacities to take into account the overall economy of the system and the balance between energy supply and demand is a problem to be further studied.Therefore,this paper studies the optimal allocation of integrated energy system.This paper mainly carries out the research work from the following aspects:(1)Taking the integrated energy system as the research object,the supply-demand and connection relationship of its general equipment is modeled and briefly analyzed,and it is combined into IES model based on the energy bus modeling architecture.(2)A two-level optimal allocation model is constructed with the constraints of equipment capacity and supply-demand balance,and the objective function of minimizing annual equivalent investment and operation cost.Different configuration conditions and typical days are set and brought into the "investment planning" layer of the model to solve the annual equivalent investment cost,and brought into the "operation scheduling" layer to calculate the operation scheduling cost.An example simulation shows the effectiveness of the proposed strategy for the optimal configuration of IES.(3)Based on the IES double-layer optimal configuration model,the heat supply network planning problem is introduced.In the "investment planning" stage,the heat supply network configuration and energy supply station location problem are quantified as economic cost and added to the investment cost of IES equipment.In the "operation scheduling" stage,considering the impact of the energy loss of the heat supply network on the system heat supply and demand relationship in the process of system heating,nsga-2algorithm is introduced for optimization calculation,An example is given to verify the effectiveness of the proposed model for IES equipment capacity configuration and hot water pipe network selection and configuration.