Research On Low-Carbon Operation And Dispatching Strategy Of Integrated Energy System Based On Carbon Source-Sink Effect

It is of great significance to realize the conversion,storage and cascade utilization of energy through a variety of energy coupling equipment in the integrated energy system,which is of great significance to improve energy utilization and promote the low-carbon operation of the system.Relying on the gas-electricity-heat integrated energy system,this paper explores the dynamic mechanism of coupling operation of gas turbine and CCS equipment from the perspective that gas turbine and CCS equipment respectively assume the role of carbon source-sink during system operation,and studies the low-carbon operation scheduling strategy of the system from day to day.The work of this paper mainly includes the following three aspects:(1)A comprehensive mathematical model of energy system considering the coupling of gaselectricity-heat multi-energy flow and the carbon cycle process was constructed.The characteristics of the composition structure of the integrated energy system are introduced,and the carbon cycle footprint capture is considered,focusing on the types of equipment undertaking the carbon cycle and their operating characteristics.(2)The day-ahead optimization scheduling of the system is solved in the deterministic scenario.Firstly,starting from the analysis of the systematic carbon source-sink equipment,the indicators are proposed and the relevant adjustment costs are established.Secondly,the adjustment fee is introduced into the overall goal of reducing the total operating cost,reducing carbon emissions,and improving the utilization level of renewable energy,and an optimal scheduling scheme based on particle swarm improvement algorithm is proposed.Finally,through the comparative analysis of economic benefits and environmental benefits,it is shown that the joint scheduling results of carbon source-sink equipment can reduce the carbon emissions of the integrated energy system,optimize the operation of different types of energy supply and consumption equipment under the coupling of multi-energy flow,and improve the operation economy and environmental protection of the system.(3)Considering the dynamic characteristics of the coupling operation of gas turbine-CCS,the intraday optimization scheduling correction strategy of the system in multiple scenarios is solved.)Firstly,the dynamic characteristics of the coupling operation of gas turbine-CCS are analyzed in detail,and the hydrodynamic numerical simulation of the gas turbine combustion chamber is carried out,and the low economic cost and low carbon emission of the system are taken as the overall goal based on the coupling of gas turbine-CCS equipment,and the approximate dynamic programming method is applied to solve the intraday optimization scheduling correction scheme,and finally the corresponding scheduling contribution index is designed to evaluate the examples in different operating modes,which verifies the effectiveness and robustness of the proposed strategy.This shows the potential of different operation modes to improve scheduling flexibility and reduce carbon emission levels.