Optimal Dispatch Of Regional Integrated Energy System With Heat Pump Based On Demand Response

With the increasingly severe energy crisis and environmental pollution,it is extremely urgent to establish a new energy system which is clean,environmental friendly,energy-saving and efficient.Based on the background,the integrated energy system has developed rapidly.In the regional integrated energy system with combined cooling,heating and power as the core,the CCHP operation mode of ‘power determined by heat’ has limited the regulation ability of gas turbines in the heating season,leading to the serious wind curtailment and high dispatch cost.Taking full account of the multi-energy complementary characteristics of the source side and the schedulable value of the demand resources on the load side of the integrated energy system,the coordinated cooperation and complementarity between the source and the load can be used to improve the wind power accommodation ability and operation economy of the system,which will be beneficial to the sustainable and stable development of the regional integrated energy system.Therefore,this article introduces ground source heat pump with higher heating energy efficiency ratio to improve the wind power acceptance ability of the system by decoupling of the operation constraints of CCHP ‘power determined by heat’ at the source side.On the other hand,the corresponding demand response model is established for deeply exploring various types of flexible loads of electricity and heat to assist the integration and accommodation of wind power.The energy saving and economical operation of the regional integrated energy system is realized through the collaborative optimization of source and load.The main research work of this paper is divided into the following aspects.First,based on the energy hub,it introduces the basic structure of the regional integrated energy system with CCHP as the core,and analyzes the model of the main units in the system.Additionally,in consideration of the development potential of geothermal energy in the system,the ground source heat pump has been brought in the source side to establish the wind power-ground source heat pump heating system and the value of heating principle and accommodating the wind power have been analyzed.Furthermore,the demand response model of various loads is established by two methods,and the principle of accommodating wind power is analyzed based on the analysis of the schedulable value of residential electricity,thermal load and charging load of electric vehicles.Then,according to the load aggregator based electric vehicle incentive demand response strategy,an optimal dispatch model of the regional integrated energy system with heat pump is established based on the incentive demand response.Initially,the operating constraints of CCHP are decoupled by adding the ground source heat pump into the source side to improve wind integration space.Secondly,the incentive demand response is adopted to guide the orderly transfer of charging load to assist wind power integration and accommodation by considering the schedulable value of electric vehicles at the load side.Finally,the source-load coordination optimal dispatch model for regional integrated energy system with the goal of minimizing the operating cost is established,which is solved by the optimization software CPLEX.Simulative results showed that adopting ground source heat pump effectively reduces the wind curtailment,and the peak-load shifting effect of demand response is obvious.Hence,the additional benefits are gained in terms of wind power accommodation and operating cost under the source and load coordination.Lastly,considering the user’s satisfaction and heating comfort ambiguity,a hierarchical optimal dispatch model of regional integrated energy system with heat pump based on price-based demand response and heat load demand response is established,which promotes the integration and accommodation of wind power through source and load collaborative optimization.The upper-level model uses price-based demand response to guide users to respond to wind power output changes,while the heating comfort ambiguity and ground source heat pump are analyzed in the lower level.The optimal output of each unit is determined with the goal of minimizing the total cost of the system in the scheduling period.Simulation results indicate that this method can effectively improve the system capacity of wind power accommodation,reduce the system operating costs and have remarkable social and economic benefits.