Research On Hierarchical And Coordinated Regulation Methods Of Integrated Energy Systems

Integrated energy systems can realize the synergy and complementarity of multiple heterogeneous energy sources,reduce system energy consumption while improving the overall energy efficiency of the system through collaborative planning at the time of construction,can provide efficient energy exchange services,and help access to various new and distributed energy sources.However,there are several problems in the operation of the integrated energy system as follows: the integrated energy system includes several mutually coupled energy subsystems,and there are conflicts between the overall interests of the integrated energy system and the interests of each energy subsystem;the dynamic characteristics of each energy subsystem differ in time scale,with regulation time constants ranging from milliseconds to minutes,which need to be coordinated and optimized.Therefore,there is a need to study the hierarchical coordinated regulation method of integrated energy systems.The article first briefly introduces the research background and significance of the research on the hierarchical regulation method of integrated energy system,and analyzes the characteristics and advantages of integrated energy system in the consumption of distributed energy.Then,the concept of integrated energy and a typical topology of integrated energy system are introduced,and the hierarchical coordination and control architecture of integrated energy system is explained.In view of the contradiction between the overall interests of the integrated energy system and the interests of each energy subsystem,a master-slave game model of the integrated energy system is proposed,taking into account the complementary coordination of multiple heterogeneous energy sources,with t he overall interests of the integrated energy system as the game subject and the interests of each energy subsystem,such as the power grid,natural gas network and heat network,as the game subordinate,taking into account the different interests of the integrated energy system as a whole and its individual energy subsystems.The interests of each energy subsystem,such as power grid,natural gas network,heat network,etc.,are the game subordinates.In the day-ahead stage,a day-ahead optimization model of the integrated energy system is established to provide a reasonable capacity plan for the system.The upper layer mainly suppresses the power fluctuation of cooling/heating units with larger regulation time constants,and the lower layer mainly suppress es the power fluctuation of generating units with smaller regulation time constants,which ensures the safe,stable,efficient and economic operation of the integrated energy system.Finally,the paper verifies the correctness and effectiveness of the regu lation strategy proposed in this paper through simulation.