Research On Low Carbon Optimization Of Integrated Energy Systems

A 3060 double carbon target has been suggested by China in order to encourage the development of clean and efficient energy systems in China.While the integrated energy system takes into account the characteristics of various energy sources and coordinates the invocation of each source,the transformation of the energy system is required to increase the proportion of renewable energy,and the increase in the proportion of new energy magnifies the impact brought on by its uncertainty.The integrated energy system optimizes the coordinated and stable operation of the energy system by taking into consideration the characteristics of various energy sources,coordinating the activation of each subsystem,achieving energy complementarity,and coordinating the invocation of each component.In order to fully exploit the carbon reduction potential of the integrated energy system,the following work has been done in this paper:First,it briefly examines the current state of integrated energy system development both domestically and internationally,the advantages of integrated energy systems in reducing carbon emissions,explains the research significance of low-carbon optimization of integrated energy systems,and identifies the development and improvement needs for integrated energy systems from both the source-side and the load-side in order to reduce carbon emissions.Then,an opportunity-constrained robust low-carbon dispatch model,considering the uncertainty of wind power and the cost of carbon emissions,is established.The uncertainty of wind power is considered at the source side,the wind speed characteristics are analyzed,the wind speed is determined by taking Weibull three parameters,the wind speed parameters are used to generate the scenario set by using Latin hypercube sampling,and then the scenario is further reduced by fuzzy C-mean clustering to fit the real wind power output,and then the carbon emission of coal-fired units is divided into three stages of modeling,followed by detailed modeling of important equipment such as gas-fired units of electric integrated energy,and the establishment of objective The low-carbon dispatch model of an electrically integrated energy system with functions including equipment operation cost,carbon emission cost,and energy purchase cost is established,and the superiority of the model is verified by setting three scenarios for comparison in the simulation.Then,taking into account P2G operation strategy and ladder carbon trading,a low-carbon optimal dispatching model of an electrical integrated energy system is proposed.Considering the equipment operation strategy and adding the step carbon trading mechanism in the integrated energy system,the P2G is divided into two processes:electric hydrogen production and hydrogen to gas and hydrogen to electricity,and the alkaline electrolyzer and PEM electrolyzer in electric hydrogen production as well as the hydrogen to gas and hydrogen to electricity equipment are modeled in detail.The electrolyzer operation strategy is formulated considering the electrolyzer operation characteristics,and then the step carbon trading model is constructed to establish an integrated carbon trading mechanism including the step carbon trading mechanism.After the simulation,it is verified that the electrolyzer operation strategy can consume more wind power,provide more hydrogen supply for hydrogen-to-gas and hydrogen-to-power,and that the ladder carbon trading mechanism can reduce the system’s carbon emissions more effectively.Finally,the potential for carbon emission reduction in integrated energy systems is explored from the load side,and an optimal scheduling model of demand response in electrical integrated energy based on carbon emission flow theory is proposed.The source side is considered the source of carbon emissions;however,supply starts from demand,and the load side should be more responsible for carbon emissions.The carbon emission flow model of electrical coupling is constructed through carbon emission flow theory,and a demand response with load side carbon emission responsibility is established as an incentive for an integrated carbon price.A two-stage low carbon dispatch model of an electrically integrated energy system is then established,which is verified by an improved node simulation system,and finally the superiority of the model is verified.