Research On Optimal Dispatch Of Integrated Energy System Considering Integrated Demand Response

Under the background of the increasingly serious energy crisis and our country’s "dual carbon" goal of "carbon emission peak before 2030 and carbon neutrality before 2060",the integrated energy system relies on the coupling conversion,complementarity and mutual assistance of multiple energy sources,and electric energy substitution to achieve energy efficiency.Clean,efficient,green and low-carbon use,so the integrated energy system has a good development prospect in this context.However,the operation constraint of "determining electricity by heat" of the combined heating and power units limits the variety of energy supply methods of the integrated energy system during the heating season,and the contradiction between the supply and demand of electricity and heat on both sides of the source and load also exacerbates the phenomenon of wind power curtailment,resulting in operating costs higher during the heating season.In order to reduce the occurrence of wind power abandonment and improve energy utilization efficiency,and fully exploit the value of dispatchable resources on both sides of the source and load,the source side relies on the mutual complementation of multiple energy sources and the coordination and cooperation of coupled units,and the load side utilizes the calling characteristics of dispatchable resources.Source-load coordination reduces the phenomenon of wind power abandonment while ensuring the economical operation,which creates a favorable environment for the development of an integrated energy system.For this reason,on the one hand,this paper introduces a high-energy-efficiency ratio air-source heat pump operating under variable working conditions and a power-to-gas device with waste heat recovery on the source side to decouple the “heat-based electricity” operation constraint of cogeneration to promote wind power consumption;On the load side,explore the reduction,transfer,and conversion value of multi-energy users’ energy demand,and establish a corresponding integrated demand response model to assist wind power grid-connected consumption.Source-load coordination reduces the occurrence of wind power abandonment and ensures the economical operation of integrated energy.The work done in this paper will be introduced from the following four aspects.First,the compositon of the integrated energy system and the operation mechanism of the multi-energy coupled units are analyzed and modeled.While introducing the combined heat supply of air source heat pump and cogeneration on the source side,the operation model of heat pump under variable working conditions is constructed to improve the accuracy of modeling;the feasibility of heat recovery and utilization of electricity-to-gas reaction is analyzed,and the value of wind power consumption of electricity-to-gas is extended.The load side utilizes the complementarity of multiple energy sources to analyze the reduction,transfer and conversion value of multi-energy users,and analyzes the wind power consumption mechanism of three demand response projects of price type,incentive type and substitution type and their impact on wind power consumption.influence.Secondly,the optimal model of source-load coordination of integrated energy system is constructed to achieve the goal of optimal operating economy in deterministic environment.The source side uses air source heat pump,electricity-to-gas and cogeneration combined heat supply considering waste heat recovery,and compresses the forced electricit y output during the wind abandonment period of the cogeneration heating season;the load side uses the integrated demand response including electric energy substitution to guide users to reduce,Transfer and convert the time period and form of energy consumption;optimize system operation with the goal of optimal system operation economy and least wind power abandonment phenomenon during the dispatch period.Simulation results show.The integrated demand response model including energy substitution can effectively alleviate the tension between energy production and consumption,the source-load coordination and optimal dispatch model can effectively increase the consumption of wind power,and the operation economy of the integrated energy system is greatly improved.Finally,an interval optimal scheduling model with multiple objectives of energy exergy efficiency and operating economy under uncertainty environment is constructed.The source side considers the uncertainty of new energy output and the uncertainty of conversion efficiency of multi-energy coupled units,and the load side considers the influence of multiple uncertainties such as the uncertainty of integrated demand response.Optimize system operation with the goal of evaluating the highest exergy efficiency of energy quality loss and quantity loss and the optimal system operation economy.The calculation example shows that the exergy efficiency can quantify the "quantitative" loss and "quality" loss of energy in the production conversion process,and the interval linear programming methods can reduce the need for accurate forecast data and improve the system’s ability to withstand uncertainty.