Research On Environmental And Economic Coordination Dispatch Strategy Of Integrated Energy System

Along with the rapid development of social economy,the demand for various types of energy on the demand side has been growing in recent years,mainly in the form of electricity,heat and natural gas,which show a year-on-year increase in energy supply and demand;At the same time,due to the year-on-year increase in the proportion of new energy installations on the supply side,certain dispatching strategies have led to an increase in system operating costs to a certain extent;And due to the uncertainty of new energy output and the current characteristics of the load,some thermal power units are ordered by dispatch to produce auxiliary power during load peaks to protect the load energy demand.In addition,due to the uncertainty of new energy generation and the characteristics of winter and summer bimodal peaks,some thermal power units are ordered by the dispatcher to assist in the peak load demand,which increases the environmental cost of the system to a certain extent.Therefore,based on the existing integrated energy system model,this paper optimizes the operating cost and environmental cost of the system equipment,promotes the unified and coordinated dispatch of the system,gives full play to the equipment regulation capability of the supply side and energy storage side,and provides the necessary support for the stable and green low-carbon operation of the system.The specific research contents of one of the papers are as follows.（1）Research on integrated energy system and its operation cost model.Firstly,we establish the operation models of power grid,heat network,gas network and energy storage of the integrated energy system,and establish the interaction topology model between different energy sources to analyze the interaction operation state of energy sources in the system;Then,based on the uncertainty of new energy output and demand-side load,we establish the respective operation cost models from the supply side,demand-side and energy storage side to lay the foundation for the subsequent research.Then,the respective operating cost models are established from the supply side,demand-side and energy storage perspectives,laying the foundation for further research.（2）Environmental cost optimization study of integrated energy system.Firstly,based on the operation models of grid,heat and gas networks of the integrated energy system in Chapter 1,we analyze the emissions of various pollutants generated during the operation of the system and the corresponding pollutant treatment costs,and establish the system carbon emission and the emission costs of polluting gases,solid wastes and liquid wastes;Then,with the lowest pollutant emissions of the system as the optimization objective and considering the relevant constraints,we establish the environmental cost optimization model of the integrated energy system considering the emissions of pollutants.Finally,the proposed optimization model is verified to be effective in reducing the pollutant emissions during the operation of the system through simulation.（3）A coordinated optimization strategy for an integrated energy system that takes into account environmental costs and economic factors.First of all,based on the analysis of the traditional scheduling strategy of the integrated energy system,a system coordination and optimization scheduling strategy is proposed by comprehensively considering the environmental cost and the system operating cost;Then,by analyzing the typical scheduling process of the system,and establishing the system environment cost and the system The optimal objective function of the system equipment operating cost;Finally,through the simulation analysis of the proposed coordinated scheduling optimization strategy,the results show that the scheduling optimization strategy proposed in this paper can achieve good coordinated scheduling of the system under the goal of minimum operating cost of system equipment and optimal environmental cost.