| In recent years,with the increasing installed capacity of wind power in China,the problem of wind abandonment has become more and more serious.Especially during the winter heating period in the "three north" areas of China,the constraints of "fixing electricity by heat" of thermoelectric units result in the unit having to increase the minimum output while satisfying the heat load,so that the space of wind power grid is seriously insufficient,resulting in wind abandonment.Installation of heat storage tank in thermal power plant can effectively decouple the constraints of cogeneration unit"fixing electricity by heat".In non-abandoned period,the unit satisfies the balance of electricity and heat,while the heat storage tank stores the excess heat.In the abandoned period,the heat storage tank releases heat,which reduces the forced output of thermal power unit,improves the space of wind power network and reduces the abandoned wind.However,when installing regenerative tank in thermal power plant,the capacity of regenerative tank has an important impact on wind power consumption and economic operation of the system,so it is of great significance to study the optimal capacity of regenerative tank.The main research work is as follows:Because the manufacturing and operation maintenance cost of regenerative tank is directly affected by its capacity,this paper adds the investment and maintenance cost of regenerative tank to the operation model of wind-power-thermoelectricity-regenerative tank-carbon capture integrated thermal power plant,and converts it into daily depreciation and daily maintenance cost to realize integrated thermal power.The total investment operation cost of the plant is the lowest objective function,and the constraints of thermoelectric coupling of cogeneration units and the climbing operation constraints of heat storage tanks and carbon capture units are considered.The simulation results show that the optimized capacity of regenerative tank is more economical and efficient than the traditional capacity of regenerative tank.The optimal capacity of regenerator not only depends on the economy of integrated thermal power plant,but also depends on the constraints of carbon capture and wind power absorption in integrated thermal power plant.Without carbon capture or the higher proportion of wind power absorption,the optimal capacity of regenerator will be larger.In the current context of low-carbon electricity,with the development of carbon trading mechanism,it will play an important role in low-carbon emission reduction.The introduction of carbon trading mechanism will have a certain impact on the optimal capacity of regenerator.Therefore,when optimizing the capacity of thermal storage tank,this paper introduces carbon trading mechanism into the scheduling objective,considers the carbon trading cost,establishes a low-carbon economic scheduling model of wind power absorption considering the cost of thermal storage tank and carbon trading,and analyses the impact of carbon trading mechanism on wind power absorption and system emission reduction,as well as the change of carbon trading price on the optimal capacity and carbon emissions of thermal storage tank.Influence.The large-scale wind abandonment in power grid can be effectively solved by installing heat storage tanks in thermal power plants.After optimizing the capacity of heat storage tanks,the economy of the overall operation of the system can be improved.When the regenerator participates in the operation with the optimal capacity,there may be a certain amount of wind abandonment,but at this time,the system has the best economy,and the change of carbon capture equipment and carbon trading price will also have a certain impact on the optimal capacity of the regenerator,wind power consumption and carbon emissions.In practical application,the appropriate capacity of regenerative tank can be selected according to the model proposed in this paper and the relevant conclusions. |
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