Study On The Problem Of Wind Rejection Based On Heating System Modeling

The main heating mode in the "three north" areas of China is coal-fired heating.Coal-fired heating brings serious environmental pollution problems.In order to promote the goal of "carbon peak in 2030 and carbon neutralization in 2060" in China,clean energy instead of fossil energy has gradually become an important means to effectively reduce carbon emissions.Multi-heat source cooperative heating has also become the advocated heating mode.A model of heating system connected to clean energy is built by using EBSILON simulation software.On the basis of verifying the correctness of the model and combining with the consumption of clean energy under different heating modes in different heating periods,the reasonable heating strategy in different heating periods is finally determined.Firstly,the different connection modes between the heat storage tank and the source-load of the heating system are studied,and finally the indirect connection mode between the heat storage tank and the primary network is selected according to the actual situation.Under this connection mode,it is concluded that the higher temperature in the storage tank can reduce the heat output level of the thermal power unit more,and in extreme cases can replace the thermal power unit to meet the heat demand of the thermal users.At a certain temperature in the tank,the higher the circulating flow rate,the lower the heat output level.In addition,the larger the volume of the storage tank,the more energy it can store,and the longer the exothermic time maintained under a certain outlet flow rate.Relatively speaking,the construction cost will also increase,which also needs to be considered in the process of construction investment.Secondly,this paper puts forward the heating strategy of wind power cooperative cogeneration unit,and completes the model construction.On this basis,the corresponding heating methods are established for different heating periods.The results show that: in the initial stage of heating,only the heat storage tank is used and the wind power consumption is the largest in this way;In the middle stage of heating,the way of controlling the output of thermoelectric unit and cooperating with the heat storage tank is adopted,and the wind power consumption is in the middle under this mode,and the comprehensive consideration is a wise choice;At the end of heating stage,the method of controlling the output force of thermoelectric unit and cooperating with the heat storage tank is adopted.Although the amount of abandoned wind consumption is the smallest in this way,it has some advantages over the traditional heating mode.In addition,a comparison of the power balance,thermal balance,and abandonment of wind consumption under different heat output levels of cogeneration units shows that as the heat output level of cogeneration units gradually increases,the wind power heating system’s abandonment and consumption the amount gradually decreases.Finally,the heating strategy of industrial waste heat cooperative cogeneration unit is put forward,and the model is built.On this basis,according to the comparison of intermittent and non-interruptible industrial waste heat in different heating periods combined with industrial waste heat output characteristics and wind power consumption under different heating modes,the results show that the whole heating cycle adopts the control of thermal power unit and the coordinated heating mode of industrial waste heat is more reasonable.At the same time,this paper puts forward the heating strategy of wind power and industrial waste heat cooperative cogeneration unit,and completes the model construction.After comparing the economy of heating system,the utilization of industrial waste heat and the consumption of abandoned air with different heating modes in different heating periods,the results show that the cogeneration unit is shut down in the initial stage of heating,and the thermal storage tank is used to complete the heat supply with industrial waste heat,in this way,the maximum wind abandonment consumption,with good environmental benefits;In the middle and the end of heating,the power output of the thermoelectric unit is controlled,and the heat storage tank is combined with the industrial waste heat to complete the heating,although the consumption of abandoned wind and the utilization of industrial waste heat have decreased,the safety and economy of the thermal power unit are guaranteed.