Equipment Selection And Influence Factor Analysis Of Distributed Energy System

Due to the problems of the unreasonable selection of equipment,the unscientific selection of evaluation indicators,and the unclear applicability of the system in distributed energy systems,these problems hinder the development of distributed energy systems.In view of such problems,this paper constructs a general equipment selection model,takes the equipment selection of distributed energy system as the main line,uses GAMS software to optimize and solve the mathematical model of distributed energy system,and analyzes the influencing factors of equipment selection of distributed energy system.The specific research contents are as follows:(1)The influence of different equipment efficiency expressions on system operating result is considered.At present,the expressions of equipment efficiency are different.The system operation strategies under different expressions are quite different.In view of such problems,taking multiple chiller combined energy supply systems as an example,the four COP expressions of the current water chillers are considered,and the operating energy consumption is taken as the optimization objective,in order to study the influence of different COP expressions on the operating results of the system.From the results,it can be concluded that the expression of COP has an impact on the operating strategy of the system and the energy consumption of the system.(2)The influence of energy storage devices on equipment selection and operation strategies of distributed energy systems is analyzed.The mathematical model of the common equipment in the distributed energy system is established.With the annual total cost as the optimization target,GAMS software is used to solve the equipment capacity in the model.The results show that the energy storage device can optimize the capacity configuration of the energy supply equipment when planning the system;the distributed energy system with energy storage device is the most economical.The results show that the capacity configuration of energy supply equipment can be optimized by considering energy storage device in system planning.The economic efficiency of distributed energy system with energy storage device is optimal.(3)Analysis of factors influencing equipment selection of distributed energy systems.The influencing factors are divided into three categories.The first category: the impact analysis of energy price mechanism,analyzes the impact of natural gas price and electricity price changes on the selection of distributed energy systems;The second category: analysis of the influencing factors of the weight coefficient of the evaluation index.By reasonably changing the weight coefficient of the evaluation index,the change of equipment output in the distributed energy system is analyzed;The third category: analysis of power generation efficiency impact of power generation equipment,considering the influence of power generation efficiency and waste heat utilization efficiency on distributed energy systems,and analyzing the variation of equipment selection results by rationally controlling the range of power generation efficiency of power generation equipment.The optimization results show that the distributed energy system is suitable for areas with low natural gas prices and relatively high electricity prices.The weight coefficient and power generation efficiency will have different effects on the selection results and operation strategies of the system.