Research On Wind Power Accommodation Strategy Of Combined Heating Of Electric And Coal Boilers

Under the dual pressure of traditional energy shortage and environmental pollution,the application of renewable energy and its grid connection technology have developed rapidly.How to use renewable energy to replace traditional energy to achieve energy transformation and further improve energy utilization,optimize energy structure and configuration,and reduce environmental pollution are the hot issues and development directions of energy and power industry research at present.In recent years,with the continuous expansion of the scale of wind power development,the penetration of wind power continues to improve.Limited by the transmission capacity of the power grid and the regulation margin of thermal power and thermal power units,the system flexibility is greatly reduced,and some areas have more serious wind abandonment phenomenon.Especially in the "Three North" area,where wind power is centralized,power structure is single,and power supply of flexible and rapid regulation system is few,in winter heating season,electric thermal coupling constraints limit the peak regulation capacity of power grid,and wind abandonment is more serious.To solve this problem,in order to improve the level of air consumption,this paper carried out a study on the strategy of coordinated operation of heat storage electric boiler and coal-fired boiler to absorb the air,the main research content is divided into the following parts.Firstly,the heating mechanism of the regenerative electric boiler is studied.This paper analyzes the thermal characteristics and mechanism of the heat supply by the heat storage electric boiler,establishes the calculation model of the wind energy consumption combined with the load and wind power prediction data of a Northeast Power Grid Company,further establishes the energy conversion model of the wind power consumption by the heat storage electric boiler,calculates the same heat by establishing the heat storage electric boiler and the coal-fired boiler model Based on the coal consumption of coal-fired boiler,the model of economic and environmental benefits of heat storage electric boiler is established.Then,the optimal scheduling model of the combined heating of the regenerative electric boiler and the coal boiler is studied.According to the characteristics of electric heating system,the constraint conditions of coordinated operation of regenerative electric boiler and coal-fired boiler are determined,and the optimal scheduling model is solved by particle swarmoptimization algorithm.Through the simulation and comparative analysis of the heat storage electric boiler in different operation mode,different capacity of the waste wind absorption effect,economic and environmental benefits,in order to verify the effectiveness and feasibility of the proposed method.Finally,from the perspective of practical application,the thermal inertia of the central heating network and buildings is considered in the optimization of the system,and the operation strategies of the regenerative electric boiler and the coal-fired boiler considering the thermal inertia are studied.The thermal inertia model of heat network and heating building is established.According to whether to use the regenerative electric boiler and whether to consider using the system thermal inertia to set up different analysis scenarios,combined with the heat storage link,the characteristics of the model in the process of scheduling operation are analyzed.Through the example analysis,it is verified that the introduction of heating network and building thermal inertia has an impact on the flexible regulation ability of the system and the wind power consumption,and further verified the positive effect of the regenerative electric boiler on the wind power consumption.