Research On Low-Carbon Economic Dispatching Of Electric-Heat Combined System Considering Multi-Type Energy Storage

With the global energy and environmental pollution problems becoming increasingly serious,countries around the world have gradually realized the importance of improving the energy structure and promoting the development of new energy.As a renewable energy source,wind power has the advantages of green,low-carbon and environmental protection.However,the power supply structure in the northern heating area of China and the reverse peak regulation characteristics of wind power have caused great difficulties in grid connection of wind power,resulting in the ineffective use of clean energy such as wind power.In addition,the traditional dispatching method with single economic operation cost as the optimization goal is difficult to meet the requirements of low-carbon sustainable development.Therefore,it is the focus of current research to explore a new optimized scheduling method that takes into account both wind power consumption and economic and environmental benefits.This thesis improves on the traditional electric-heating combined system model,and conducts the following research on the optimization scheduling problem that comprehensively considers carbon trading costs and multiple types of energy storage forms.Firstly,by analyzing the operating characteristics of the thermal power unit,the mechanism of abandoned wind generation in the electric-heating combined system is studied,and the effects of adding heat storage devices,electric boilers,and electric energy storage on the flexibility of the system are further studied.In addition,the carbon trading mechanism is studied based on the initial carbon emission quota allocation method,the impact of the introduction of carbon trading costs on the dispatch of the combined heat and power system is analyzed.Secondly,in order to reduce the environmental pollution caused by carbon emissions during the power generation process of the electric power industry and increase the proportion of wind power consumption,an optimal dispatching model for a combined electric-heating system considering energy storage and carbon trading costs was proposed.This model comprehensively considers the power generation costs of conventional thermal power units,the power generation costs of thermal power units,wind power operation and maintenance costs,wind abandonment penalties,electricity storage operation costs,carbon transaction costs,and related constraints of each unit of the system.Yalmip+Gurobi commercial optimization software was used to solve the model.Through the comparative analysis of examples,it is verified that carbon trading can optimize the energy structure of the combined heat and power system,and that under carbon trading,the participation of electricity storage can effectively improve the wind power utilization rate and economic and environmental benefits of the system.Finally,in order to further improve the wind power dissipation effect and economic and environmental benefits of the system,a multi-type energy storage model with electric boilers,electric energy storage,and heat storage as the core was established,and its energy conversion,storage,and output links were established.On this basis,a low-carbon economic dispatching model of a combined electric-heating system that takes into account various types of energy storage is constructed.The model takes the minimum comprehensive operating cost as the optimization goal,and takes into account factors such as energy balance during system operation.The simulation results of this dispatching mode are used to analyze the wind power consumption effect and carbon emission situation,and the impact of carbon trading price on the system dispatching results is further discussed.The research work in this thesis provides a theoretical basis for promoting the development of the wind power industry and low-carbon power.