Research And Engineering Application Of Comprehensive Energy System Configuration Optimization Based On Multi Energy Flow Balance

With the increasing contradiction between the growth of energy demand and energy shortage,energy utilization and environmental protection,it has become an inevitable trend of social development to improve energy utilization,develop new energy sources and strengthen the comprehensive utilization of renewable energy.Integrated Energy System(IES)can be customized according to the actual load demand of cooling,heating and electricity,to achieve the complementary advantages of different energy sources,effectively improve the comprehensive utilization efficiency of energy and reduce energy costs.The configuration optimization of integrated energy system is an important research direction in the planning and design of integrated energy system,but the configuration optimization problem involves many types of equipment,rich combinations,and serious coupling of multiple energy streams,and the operation strategies are also very diverse,which makes the calculation workload of configuration optimization very large,and the design and optimization of configuration scheme is extremely difficult.This paper takes the configuration optimization method and application of a typical integrated energy system as the research and development content,focusing on the configuration optimization method based on the balance of multiple energy flows,and the main research and development contents include.(1)Establishing typical equipment mechanism models of integrated energy systems,including photovoltaic,gas turbine,lithium bromide chiller,gas boiler,heat pump,battery and heat storage tank,and fitting a nonlinear fitting model that can meet the required accuracy of configuration optimization on this basis,as well as establishing a multi-energy flow balance calculation model,including energy supply and demand balance model and tidal parameter balance model,to effectively reduce the burden of model calculation and It can effectively reduce the burden of model calculation and lay the model foundation for the subsequent research.(2)Focus on the study of multi-stream balance-based configuration optimization methods,comparing the differences between them and conventional configuration optimization methods in terms of solution process,model construction and optimization calculation methods,and analyzing the advantages and disadvantages of the configuration results of the two methods in terms of system performance,computational solution efficiency and ability to deal with object nonlinearities when the system degrees of freedom and equipment linearization are different for different integrated energy system objects.The advantages and disadvantages of the two methods in terms of system performance,computational solving efficiency and ability to deal with object nonlinearities.(3)Develop the simulation software of the campus smart energy system based on MATLAB/SIMULINK platform,and divide the software development work into two parts,one is the construction of the integrated energy system characteristic model library for configuration calculation and the study of multi-energy flow balance calculation,and the other is the study of the integrated energy system performance evaluation and configuration optimization for configuration calculation,combining the completed equipment model and algorithm module.Model testing and module simulation are carried out,the model library of equipment is constructed,and the engineering case application verification of the software is completed.(4)Since the engineering realization of the planning and design of integrated energy system,in addition to the core aspect of configuration optimization,other engineering issues including background research,resource analysis,load prediction,engineering construction plan determination,risk analysis,etc.need to be considered.Therefore,combined with the engineering application requirements,the summary is completed to summarize the contents of the standardized process design of the feasibility study report for the planning and design of the actual integrated energy station,and a complete analysis of a should actual case,using the configuration optimization method and the corresponding software functions that have been completed this paper for calculation and verification.