Study On Calculation Technology Of Steady-State Power Distribution Of Regional Energy System Based On Electro-Thermal Coupling

Due to the rapid development and widespread application of integrated energy systems in developed countries in recent years,all countries in the world have paid close attention to it,collaborative scheduling between electric and thermal system is also gained increasing attention.Because of the independence of traditional energy systems will make energy waste and structural optimization,the independent electric and thermal systems are integrated and coordinated in a certain area to form an electrically coupled regional energy system,which can reduce energy consumption.Regional energy systems are developing year by year,so the structure in the system is becoming more complex,and the coupling relationship between equipment and networks is becoming more and more,which makes the collaborative management and scheduling of regional energy systems increasingly difficult.Some areas in China,such as the northwestern part of Liaoning,have the characteristics of more developed wind power but serious winds,the decoupling calculation of the energy network of the electro-thermal coupling system is a new research field.Therefore,this paper focuses on the modeling and simulation of regional integrated energy systems,and performs detailed steady-state power distribution calculations for this region.Firstly,based on an overview of the definition and characteristics of electric,thermal and electro-thermal coupling systems,the models of each steady-state equipment in the electro-thermal coupling system is built under specific conditions,including the boiler system model,the back-pressure turbine model,hot water transfer model,the power transfer model,and the building thermal load model,And related constraints,such as power balance,branch flow constraints and node voltage constraints are formulated.Secondly,according to the above various equipment models,the combined use of combined thermoelectric networks,the energy network equation is established and the solution method is also studied,it is inferred that the joint calculation method is used to solve the problem.Taking a local power grid in a city in northwestern Liaoning as an example,the simulation of each steady-state equipment model is carried out after substituting the relevant state variables.Finally,considering the electric boiler as the heat source and taking into account of the heat storage characteristics of the building,the steady-state power distribution of the electrothermal coupling system is analyzed.Through the analysis results,taking the Northwestern Liaoning as an example,the proportion of thermal power in a thermal power plant in a certain city is reasonably allocated to realize the comprehensive management of the energy system in the region,thus improving the problem of wind power consumption in the heating period in northwestern Liaoning and reducing the amount of coal used in the region.In the electro-thermal coupling level it plays a role in protecting the environment and reducing pollution.