Research On Operation Optimization And Comprehensive Evaluation Of Integrated Energy System Based On Carbon Trading Mechanism And Demand Response

Under the background of energy structure in transition,as an integrated energy system with efficient multi-energy complementary synergy and renewable energy potential has a high research value and related policy continues its fossil energy heating low carbon transformation,However,in the existing integrated energy system,the consciousness of priority use of renewable energy supply is not strong,the lack of preferential policies for operation,and the potential of energy saving through optimization scheduling strategy has not been fully tapped.Based on the above background,aiming at the existing engineering examples of electrothermal comprehensive energy system,the stepped carbon trading and comprehensive demand response mechanism are introduced to study the system optimization scheduling model and comprehensive benefit evaluation.The main research contents include:First of all,on the basis of the existing electric integrated energy system framework,from energy production and energy recovery,energy conversion and energy storage link building contains more gas internal combustion engine,ground source heat pump,the source of energy storage devices,gas boiler and other mathematical model,and based on this architecture relationship building energy transmission model.Traditional and stepped carbon trading mechanisms are analyzed,and mathematical models such as carbon emission quota,carbon trading cost and CCER cost are constructed.Through the linear weighted fusion of economic cost and carbon trading cost,the low-carbon economy optimization scheduling model of electric heating comprehensive energy system was established,including the step carbon trading model.The basic operating parameters were set for the studied example,and the model was solved by using Cplex solver.The simulation results of different operation scenarios show that the introduction of carbon trading mechanism can effectively reduce the carbon emissions of the system while taking into account economy.Step carbon trading can further reduce carbon emissions and give full play to the advantages of renewable energy in the carbon trading market.Through the hourly scheduling results,the paper explores how the low-carbon economic scheduling model effectively connects energy cost and carbon emission cost,and analyzes the sensitivity to the economy of carbon price to get the relatively coordinated carbon price interval of the low-carbon economy of the model.On this basis,a mathematical model of the integrated demand response of electricity and heat is constructed,taking into account the flexible load characteristics and dispatchable values.By introducing it into the dispatching model,a low-carbon economic optimisation dispatching model is established that takes into account the stepped carbon trading-integrated demand response of electricity and heat.The simulation results of different demand response scenarios show that the integrated demand response model can effectively reduce system operating costs,carbon emissions and load peak-to-valley differences,and effectively smooth out demand-side load fluctuations,while ensuring customer demand and comfort.Simulation and analysis of the optimal dispatching strategy for different working conditions on a typical day throughout the heating season shows that the low-carbon economic optimal dispatching model built can enhance the space for renewable energy consumption and promote the coupled replacement of traditional fossil energy by renewable energy while ensuring economy,so as to achieve emission reduction and carbon reduction.Finally,in order to comprehensively assess the comprehensive benefits of the dispatching scheme,a complete set of evaluation system and method for the comprehensive benefits of the dispatching scheme of the integrated energy system is established.A multi-dimensional and multi-level evaluation index system is constructed,and the hierarchical analysis method and entropy weighting method are combined to assign weights to each index.The basic operation data of the whole heating season obtained from the simulation is used to calculate the evaluation indexes and the multi-level fuzzy comprehensive evaluation method is applied to obtain the comprehensive evaluation value of the scheduling scheme.The evaluation results show that the low-carbon economy optimisation scheme,which takes into account stepped carbon trading and integrated demand response,has good overall benefits and can be considered for actual operation.The evaluation results show that the low-carbon economy optimised dispatching scheme with stepped carbon trading and integrated demand response has good overall benefits and can be considered for actual operation.