Optimal Scheduling Of Integrated Energy Systems With Ground Source Heat Pumps And Energy Storage Devices

With the transformation of the global economic form and energy structure,the traditional energy structure is facing huge challenges.A large number of energy gaps and environmental pollution issues have brought the new energy technology revolution to a prelude.From the perspective of developing clean energy,coping with global warming,ensuring energy supply,and promoting economic development,various countries have generated a strong interest in a clean,environmentally friendly,and sustainable integrated energy system.The integrated energy system maintains the stable operation of the system through mutual cooperation among multiple energy streams.Optimizing the coordinated scheduling among multiple energy streams can achieve efficient use of energy to achieve better economic benefits.This paper researches on the optimal scheduling problem of integrated energy systems including ground source heat pumps,combined heat and power(CCHP)systems,and multiple energy supply and storage devices.The combined cooling,heating and power supply system can realize the unified and coordinated operation of multiple energy flows and the complementary advantages of mutual transformation.The traditional optimization model introduces various types of power storage devices into the optimal dispatch of the integrated energy system,and exerts its peak-shaving and valley-filling functions to balance the electrical load demand.However,in addition to electrical balance constraints,these devices also have thermal balance and cold balance constraints and mutual coupling constraints between energy flows that affect the energy balance of the entire system.This paper introduces a ground source heat pump and a cold storage heat storage device on the basis of the traditional model,which simplifies the mutual coupling between cold,heat and electricity,reduces the supply and demand gap of cooling and heating load in the most economical way,and reduces the total cost of the system’s economic operation.Improve the overall energy efficiency.In the optimization model established in this paper,two optimization scheduling strategies were selected,namely,the optimal total cost of typical daily economic optimization scheduling and the highest energy utilization rate of the entire integrated energy system;considering the coupling constraints of energy conversion and the beginning and end of energy storage devices Conservation constraints of state energy,balance of supply and demand of cold and heat power,etc.Finally,the established nonlinear model is linearized and mixed integer linear programming method is used for solution.It is also compared with the traditional CCHP integrated energy system optimization model without introducing ground source heat pump and cold storage heat storage device.The simulation results show that the introduction of energy storage devices and ground source heat pumps can adjust the mutual coupling relationship between the cold and heat power flow in the integrated energy system,make the system’s energy supply adjustment more flexible,improve the system’s comprehensive energy utilization rate,and bring more Significant economic benefits.The paper has 25 figures,8 tables and 52 references.