Research On Coordination And Optimal Operation Of Community Multi-Energy System

Integrated energy system(IES)breaks the energy supply barriers between traditional different energy sources and realizes the flexible conversion between energy sources.The multi energy system centered on the power system fully integrates cold and hot energy,The IES composed of various energy conversion equipment such as Renewable Energy Sources(RES),Gas Turbine(GT),Absorption Refrigerator(AR),Electric Refrigerator(ER),Gas Boiler(GB),fully displays the complementarity of different energy sources in time,space and other characteristics,and completes the energy conversion between multiple energy systems.Multi-energy system breaks the energy supply barriers between traditional different energy sources and realizes the flexible conversion between energy sources.In this paper,the coordinated and optimized operation of the park multi energy system is studied.First of all,the energy supply framework of the park multi energy system is constructed;This paper analyzes the output characteristics of fans,photovoltaic,gas turbines and other output sources,analyzes the gas turbine,cold and heat conversion equipment(electric refrigerator,absorption chiller,heat exchanger,gas boiler),electric energy storage equipment and conducts mathematical modeling according to their physical characteristics.The optimal scheduling model and strategy of multi energy system in a single park are considered.Taking a typical industrial park multi energy system as an example,taking the system economic optimization as the objective function,the optimization variables and constraints are analyzed and dealt with.The mixed integer linear programming method is used to solve the problem.Taking the two typical days of summer and winter as the research object,the system internal equipment output is obtained through the actual case of day ahead optimal scheduling,and the economic benefits of multi energy system are analyzed.Finally,a multi energy hub optimization method based on non cooperative game is proposed,which abstracts a single Park including multi energy system into an energy hub,models energy production,conversion and energy storage equipment in the energy hub,and establishes a multi energy hub framework of multi energy collaborative operation.Then,the non-cooperative game model of multiple energy hubs based on Nash equilibrium is built.Each EH takes the minimum daily operation cost as the objective function to participate in the game with other EH,and the equipment output and load balance condition in each energy hubs are analyzed.The simulation results in MATLAB verify that the multiple energy hubs can make full use of the complementary characteristics of inter-regional loads,so that the energy hubs can optimize the individual operating costs and improve the flexibility of the system as well.