Research On Coordinated Consumption Of Wind Power By Multi-Source Energy Storage And Thermal Power Units

In the heating season of northern China,cogeneration units have limited their power output regulation ability in order to meet the heating demand first.At the same time,wind power has obvious anti-peaking characteristics and volatility.These two reasons jointly lead to the heating season serious wind abandonment.In response to this phenomenon,this paper analyzes the reasons for the high incidence of wind abandonment,constructs a comprehensive energy system consisting of wind turbines,cogeneration units,and multi-source energy storage systems,studies the optimal configuration of multi-source energy storage systems,and formulates a strategy for coordinating wind power consumption between the multi-source energy storage system and the cogeneration unit.The main research work of this paper is as follows.(1)Comprehensive energy system structure and its model.In order to fully absorb the excess wind power in the heating season in northern China and improve the economy and flexibility of the operation of combined heat and power units,this paper first constructed a wind turbine,combined heat and power units,electric boilers,electric hydrogen production equipment,fuel cells,storage the integrated energy system including hydrogen devices,energy storage cells,and heat storage devices,etc.The mathematical models of each unit in the system were established separately,which laid the foundation for the research on the optimal configuration of multi-source energy storage systems and the research on the intra-day scheduling strategy to promote wind power consumption.(2)Research on optimal configuration of multi-source energy storage system.Reasonable configuration of the multi-source energy storage system can effectively reduce the total operating cost of the multi-source energy storage system while improving the wind power absorption capacity of the integrated energy system.This paper analyzes the relationship between the economics of the integrated energy system and the multi-source energy storage system and the power and capacity of related units in their respective systems,the economic model of the optimal configuration of the multi-source energy storage system is established.Based on the total operation of the multi-source energy storage system,with the lowest cost as the goal,considering the energy balance constraints in the system and the operational constraints of each unit,an optimal configuration model for a multi-source energy storage system was established.The model was solved using an improved genetic algorithm,and the correctness of the constructed model was verified by simulation performance.And compare and analyze the optimal configuration results and wind power consumption effects in different scenarios.(3)Intra-day dispatch strategy to promote wind power consumption.In order to solve the problem of low accuracy of the day-to-day scheduling plan caused by the fluctuation of wind power output and the uncertainty of the electric heating hydrogen load demand,an intra-day scheduling strategy to promote wind power consumption was formulated based on the optimal configuration of the multi-source energy storage system.The overall framework of the multi-time scale scheduling plan is determined,and based on the day-to-day scheduling plan,the intra-day rolling scheduling plan model with the minimum daily operating cost of the integrated energy system as the target and the minimum sum of the adjustment amounts of the units in the integrated energy system are the target's intraday real-time scheduling model.The simulation results of the example show that under the intra-day scheduling strategy,each unit in the system can effectively track the wind power output fluctuations and the changes in the electric heating hydrogen load demand by adjusting their respective output in real time,which further enhances the system's ability to accept wind power.