Economic Dispatch Of Electric Thermal Integrated Energy System Considering Demand Response And Wind Power Consumption

In the "Three North" region of China,due to the working mode of "heat determines power",large-scale combined heat and power(CHP)units in winter heating period have limited self-regulation capacity,resulting in a large number of abandoned wind,and the randomness of wind power output increases the dispatching cost of integrated energy system.In this paper,based on the integrated energy system,considering the uncertainty of wind power,combined with the physical characteristics of CHP units and the demand response principle,a scheme of wind curtailment is proposed to tap the regulation capacity of source side and load side.The purpose of this study is to solve the problem of high power generation cost caused by the inverse peak regulation characteristics of wind power in heating period and the insufficient regulation capacity of integrated energy system under uncertainty,develop a highly operable combined thermal power dispatching model to adapt to the changeable environment of wind power,and form an effective output dispatching strategy of combined thermal power units.Firstly,the basic framework of integrated energy system is proposed.In the basic framework,analyzed the output principle of CHP units and the coupling relationship between the thermal and electrical output interval changes;further explored the electrical output regulation range of CHP units,and then proposed the working mode of heat supply network interconnection to improve the regulation capacity of the source side electrical output;based on the mathematical idea of equation,deduced the mathematical conditions to improve the regulation capacity of CHP units;The solution method of linear programming method and the treatment method of constraint conditions are discussed,which lays the foundation for further research.Secondly,Considering that in the actual production and life,the interconnection mode of thermal power network may damage the revenue of power sales of thermal power plants,and reduce its enthusiasm to participate in the interconnection of thermal power network.Therefore,the theory of mathematical game is introduced to build S-N game model based on the interconnection mode of thermal power network,and the game leader of thermal power dual network is specified,and each power plant is followed by simulation to get the game equilibrium strategy,so as to make the thermal power plant as the leader of the game Maximize the interests of each participant.Finally,aiming at the problems of strong thermoelectric coupling of CHP units and uncertainty of wind power output in the integrated energy system,a scheduling model of interconnected heat supply system considering two-stage demand response principle is established by taking the source side and load side regulation capacity of the system as the main line.In this model,the heat supply network interconnection mode is introduced into the source side to improve the self-regulation capacity of CHP units.On this basis,the load side explores the important role of price based demand response.Firstly,based on the day ahead wind power forecast,the day ahead segment price is introduced to establish the day ahead consumption model considering the participation of demand response.Further,based on the high accuracy day ahead wind power forecast,the day ahead wind power price is introduced It can guide the secondary response of the load,reduce the scheduling demand brought by the uncertainty of wind power,and reduce the generation cost of the whole system.