Station-Network Cooperative Optimization Of Regional Integrated Energy System Considering Demand Response

Integrated energy system(IES)refers to the energy integration system formed by theoptimization of energy production,transmission,distribution,conversion,consumption,and storage in the process of planning,design,construction,and operation.IES can realize energy cascade utilization through organic coordination and optimal dispatch of various energy systems,which can significantly improve the security,flexibility,economy and reliability of energy supply,and has developed rapidly in recent years.This paper focuses on solving the problem of planning the energy station and grid structure in a regional integrated energy system including the coupling of electricity,heat and gas.This paper mainly includes the following aspects:for the multi power flow model of the IES,this paper establishes a detailed mathematical model including the gas turbine,gas boiler,distributed wind power and photovoltaic,demand response of the electric and heat load.For the planning model,a bi-level planning model of comprehensive energy system considering optimal scheduling is proposed.Based on the p-median model and multi-objective optimal scheduling model,the multi-stage planning methed and typical scenario analysis methed are adopted to select the location and capacity of energy stations,and to optimize the routes of power system pipelines,thermal system pipelines and natural gas system pipelines.In the aspect of model solving algorithm,this paper proposes greedy-variable neighborhood algorithm,which not only has high efficiency,but also can get the global optimal solution.For the example simulation of integrated energy system planning,seven planning scenarios are set up in this paper,and the model is solved based on MATLAB platform.The results of location and capacity of each equipment in the system and the path from energy station to load are obtained.From the perspective of total investment and construction cost,operation cost,environmental protection and energy supply reliability of the system,the results of seven planning scenarios are compared and analyzed,focusing on the impact of load demand response on the planning results.The planning model proposed in this paper solves the planning and optimization problem of IES,which is in line with the national energy development strategy.It is hoped that the work of this paper can provide theoretical methods and technical support for the IES planning and optimal operation.