Optimal Operation Of Integrated Energy System Considering Heat Recovery Characteristics Of Power-to-gas And Demand Response

At present,the environmental pollution caused by the massive combustion of fossil fuels is becoming more and more serious.At the same time,the random uncertainty of wind power output and the constraints of combined heat and power units by the traditional "determining power by heat" operation mode lead to insufficient regulation capacity of units and forced abandonment of a large number of wind power resources.Therefore,from the perspective of integrated energy system,the paper comprehensively optimizes the resources on both sides of power and load,makes full use of the heat recovery characteristics of power to gas on the power side,implements the integrated demand response of power and heat on the load side,and introduces the stepped carbon trading model to strictly control the carbon emission of the system,so as to improve the energy utilization rate and economic and environmental benefits of the integrated energy system.On the basis of summarizing the research status of electricity to gas,demand response and integrated energy system at home and abroad,the structure of the integrated energy system and the operating characteristics of each component unit in the system are analyzed in detail,and the carbon trading mechanism and demand response are introduced in detail,which provides a theoretical basis for subsequent research.In order to further improve the utilization efficiency of power to gas and solve the problem of limited regulation capacity of combined heat and power units,the positive effect of the heat recovery characteristics of power to gas on decoupling the electro-thermal coupling constraints of combined heat and power units is studied.At the same time,the stepped carbon trading model is introduced to participate in the optimal operation of the system,strictly restrict the carbon emission.The simulation results of different operation modes are compared and analyzed.It is verified that the proposed model can effectively improve the wind power consumption capacity,reduce carbon emissions and the comprehensive operation cost of the system.In order to make full use of the response potential of different types of loads,based on the above research,taking the minimum total system operation cost after incorporating the integrated demand response cost as the objective function,an optimal operation model of integrated energy system considering the integrated demand response of power and heat is constructed.The rationality and effectiveness of the research method in this paper are verified by analyzing the results of numerical examples under different operating scenarios.At the same time,it shows that on the basis of the above optimization results,considering various types of demand response on the load side can achieve better wind power consumption effect and effectively improve the economy of system operation.In the integrated energy system,the heat recovery characteristics of power to gas and the stepped carbon trading mechanism are systematically studied.Combined with the in-depth analysis of the schedulable resources on the load side,the research results provide an important reference value for the research on the optimal operation of the system considering the operation characteristics of resources on both sides of the power and load.