Research On Coordination And Optimization Of Regional Integrated Energy System Considering Source Load Interaction Strategy

In recent years,with the continuous development of social economy,the exploitation and utilization of energy by human beings have also increased rapidly,and the problems such as the extensive use of traditional fuels and environmental pollution have become increasingly obvious,so the development of sustainable and clean energy has become the focus of attention all over the world to improve energy efficiency.Under this background,the integrated energy system(IES)arises at the historic moment.Integrated energy system refers to the integration of coal,natural gas,electric energy and other energy sources in a certain region,and realizes the efficient cascade utilization of energy through organic coordination and optimization of energy generation,conversion,storage and consumption.It is of great significance to promote the large-scale development of renewable energy and alleviate the pressure on the environment.However,in the actual research,there are still some problems,such as insufficient wind power consumption capacity,waste of capacity and so on,so that the benefit of the system can not be maximized.In order to optimize the integrated energy system reasonably,the technical scheme to improve the efficiency of the system from the point of view of source,network and load has been analyzed,and the following work has been done in this paper:(1)The basic architecture of the regional integrated energy system is constructed,and the operation characteristics of the typical equipment in the regional integrated energy system are taken into account.The general model of energy production and storage equipment is established,and the energy balance model of typical comprehensive energy system is established based on energy bus method.Secondly,the end-user energy demand forecast is studied,and the forecasting method of electricity demand which can reflect the weather and date characteristics is discussed in detail.Thus it lays a foundation for the optimization of regional integrated energy system.(2)Starting with the flexible load scheduling model,interruptible load,transferable load and translatable load are established.In the three kinds of power flexible load dispatching model,the concept of user discomfort is introduced.Furthermore,a scheduling model of regional integrated energy system considering flexible load dispatching is established,with emphasis on the influence of flexible load on improving the economy of regional integrated energy system.(3)Starting from the source side and the network side,a heat network model considering the dynamic characteristics of water temperature of heating pipeline is established on the network side.The restriction of temperature and flow balance is discussed,the influence of supply and return water temperature on heat loss is discussed,and the expression of heat loss varying with supply and return water temperature is fitted.Add a heat pump device on the source side,establish a gas turbine-heat pump joint system,strengthen the electrothermal coupling,make full use of the electrothermal complementary characteristics,and consider the economic and energy indexes.the effects of optimizing heat loss of heat network and introducing heat pump on system economy and wind power consumption rate in the process of dispatching and operation of regional integrated energy system are studied.