Joint Modeling And Optimization Of Multi-region Transmission In Multi-energy Flow Systems

Energy is an important foundation for the survival and development of human economy and society.In order to cope with the increasing energy demand and the increasingly serious environmental pressure,it has become an important task for human development to improve the efficiency of the energy system and the utilization rate of renewable and clean energy.The multi-energy flow system characterized by the synergy of electric energy,heat energy and gas energy and the complementarity of renewable energy is one of the important means to solve the current energy and environmental problems.In order to solve the above problems,from the perspective of unified scheduling of multi-energy flow systems,based on system modeling and optimal design,this paper conducts systematic modeling and optimization research on multiple regions in the multi-energy flow system.Firstly,the construction of the multi-energy flow system model is introduced,the functional architecture of the multi-energy flow system is briefly described,and the equipment model of the multi-energy flow system is established.The research on system optimization scheduling model lays the foundation.Secondly,according to the characteristics of various energy flows such as electricity,heat,cold,and air,a multi-energy flow system day-ahead optimal scheduling model is established for the residential,industrial and commercial areas in the multi-energy flow system in turn.Four different system scenarios are designed,the model program is written on the YALMIP platform in MATLAB,and the CPLEX commercial solver is called for optimization calculation,and the results under each scenario are analyzed and compared.In addition,it further explored the consumption effect and absorption mechanism of wind power and photovoltaics by electricity storage devices,heat storage devices and electric boilers by taking residential areas as an example,and obtained the new energy consumption effect and absorption mechanism of three different devices.At the same time,environmental protection is considered in the industrial zone,and the application of carbon capture and storage technology in the multi-energy flow system is realized,which provides guidance for promoting the green development of the multi-energy flow system.Finally,an optimal scheduling model of multi-energy flow system considering multiple energy hubs is established,and the comprehensive utilization relationship of regional energy,which is controlled by the coupling,interconnection and mutual influence of multiple energy flows between energy hubs,is analyzed.Aiming at the lowest overall operating cost of the multi-energy flow system in three regions,an example analysis of a multi-energy flow system with three energy hubs is carried out.The comparative analysis results show that the coordinated scheduling of the energy flow between the energy hubs and the coupling and complementarity between the energy hubs have significant effects in reducing the overall operating cost of the multi-energy flow system.