Low Carbon Economic Dispatch Of Integrated Energy System Based On Carbon Oxygen Cycle

In recent years,China’s renewable energy power generation technology has achieved rapid development,but the local absorption capacity of abundant renewable energy is insufficient,and there is a relatively serious waste of energy.Faced with the multiple pressures of global warming,fossil energy depletion and low carbon in the power industry,the low carbon optimal operation of the integrated energy system has encountered difficulties.In order to solve the problems of environmental pollution and inaccurate carbon emission measurement in the production process of the integrated energy system,and improve the renewable energy utilization rate and economic benefits of the integrated energy system.Therefore,the low-carbon economic dispatch of integrated energy system based on carbon and oxygen cycle,the reasonable transformation of high-carbon power plants and the planning of carbon trading market can effectively promote the low-carbon development of integrated energy system.First,the theoretical description of the operation characteristics of the carbon capture power plant based on energy sources and gas utilization.Analyze the energy flow relationship between the carbon capture power plant and each unit.And the corresponding relationship between energy flow and gas flow in the carbon capture power plant.Then the flexible operation and low carbon principle of carbon capture technology are studied.From the perspective of network structure,the system architecture and low carbon model of carbon and oxygen combined cycle are proposed.Analyze the operation characteristics of the basic model of carbon and oxygen cycle.And the energy time-shift characteristics of the internal gas storage equipment in the carbon and oxygen cycle capacity-increasing model.Then the flexibility of system operation is studied.At the same time,the low carbon principle of carbon and oxygen cycle system is considered.It provides theoretical support for the research on low-carbon operation and economic dispatch of integrated energy system.Secondly,in order to solve the contradiction between energy supply and carbon emissions,according to the law of mass conservation and the law of energy conservation,the energy hub model of carbon and oxygen cycle system is constructed,and carbon and oxygen elements are introduced into the model in the form of gas.In order to solve the problem of time inequality between interconnected devices,a flexible operation mode with storage devices as the connection hub is proposed.Based on the constraints of the system operation mechanism,the variation range of the operation range is studied,and the objective function with the optimal operation cost is established.The calculation results show that the carbon and oxygen cycle system can effectively improve the consumption of renewable energy and reduce carbon dioxide emissions,reflecting the advantages of interconnection of multi-energy systems.Finally,considering the diversity of energy supply and marketing and the complexity of energy chain migration of the integrated energy system,the life cycle assessment method is adopted.Research on carbon emissions in the whole process of energy cycle and power plant cycle.Comprehensively analyze the environmental impact and greenhouse gas emissions between multi-energy systems.Accurately calculate the carbon emissions of the integrated energy system.So that the integrated energy system can effectively participate in the regulation of the carbon trading market.The operation mode of combining carbon emission coefficient with reward and punishment ladder carbon trading mechanism is also considered.The economic evaluation of carbon capture power plants is carried out using the method of economic cost analysis.Comprehensive analysis of economic benefits of the power plant and comprehensive analysis of various economic parameters.The carbon transaction cost and the power plant evaluation results are introduced into the comprehensive energy system economic decision-making indicators.The results of the example show that the output of low carbon unit replacing high carbon unit is increased,and the carbon emission is effectively controlled.The market economy is adopted to restrict carbon emissions,so that the economic cost and carbon emissions are effectively improved.That is to say,integrated energy system with consideration of carbon capture technology,life cycle assessment energy chain and ladder carbon trading mechanism has good low-carbon and economic performance.Low-carbon energy transformation can be realized.