Research On Low-carbon Economic Dispatch Of City Integrated Energy System Based On Stackelberg Game

In response to the growing problem of greenhouse effect and energy depletion caused by the use of fossil energy,China has clearly proposed a "dual carbon strategy" to meet the challenge.The city integrated energy system(CIES)is based on traditional fossil energy sources and integrates natural gas,wind power,photovoltaic and other clean energy sources,and at the same time can combine with carbon capture and storage technology to reduce system carbon emissions,which is important to achieve "carbon peaking" and "carbon neutral"."Carbon neutral" is of great significance.In the continuous development of integrated energy system,the overall system optimization approach cannot meet the interests of all the main actors in the integrated energy system.To this end,this paper constructs an integrated energy system with electricity-heat-cooling based on the stackelberg stackelberg game,establishes a low-carbon economic dispatching model considering the cooperative operation of carbon capture system,electricity-to-gas equipment and demand-side response,and proposes a low-carbon optimization operation method based on the stackelberg game.The main research contents of this paper are as follows.First,the basic framework of the integrated energy system containing electricityheat-cooling is studied,and the models of gas turbine,gas boiler,electric chiller,absorption chiller,photovoltaic power generation,wind power generation,and energy storage equipment inside the integrated energy system are constructed.Secondly,the basic structure and operation mechanism of carbon capture power plant are analyzed,the energy time shift characteristics of carbon capture power plant are studied in depth,and the mathematical model of carbon capture power plant and electricity/heat demand side response is established,which lays the foundation for the subsequent simulation of calculation cases.At the same time,to address the problem of unsynchronized operation time of gas-to-electricity and carbon capture systems,a solution memory is proposed as a CO2 "buffer" to couple the carbon capture system and gas-to-electricity to ensure sufficient carbon source to synthesize methane when the gas-to-electricity plant starts,and to solve the problem of conflicting energy consumption and load demand of carbon capture.In addition,the current research on carbon capture system and gas-togas equipment mainly focuses on the electricity-gas interconnection system,but rarely involves the integrated electricity-heat-cooling energy system,and rarely considers the joint role of load demand-side response.To this end,a low-carbon economic dispatch model of the integrated energy system with electricity-heat-cooling is developed,considering the joint operation of carbon capture system,gas-to-electric equipment and demand response under the integrated flexible operation mode.The calculation example shows that the proposed model has lower carbon emissions and integrated operation cost.Finally,in order to solve the problem of conflicting interests and high carbon emissions in the integrated energy system,the integrated energy system model considering stackelberg game is proposed.At present,most demand-side responses are introduced to reduce the economic cost of system operation,and less research is done to reduce the system carbon emission.For this reason,the traditional demandside response strategy is improved,and a two-fold incentive integrated demand response strategy is used to achieve low-carbon economic operation of the system.Finally,given that the model has the characteristics of high-dimensional nonlinearity,the traditional differential evolution algorithm is improved,and the double mutation differential evolution algorithm is used to solve the upper model and the CPLEX solver is used to solve the lower model,and the simulation results verify the effectiveness of the proposed model and method.