Research On Optimal Dispatching Of Thermal Power And Carbon Capture Based On Wind-solar And Water-storage Complementary Power Generation System

In recent years,with the rapid development of the world economy,the energy situation is increasingly tense,and the development and utilization of renewable energy such as wind energy and solar energy is imminent.Due to the large-scale random fluctuation of wind power,photovoltaic access to the grid,resulting in a certain impact on the safe and stable operation of the grid.At the same time,thermal power is still the main mode of power generation in China.CO₂produced by coal combustion aggravates the greenhouse effect of the atmosphere.Therefore,in order to solve the impact of large-scale wind and light grid connection on the power grid,as well as the problem of wind power and photoelectric absorption,it is also urgent to solve the carbon emission problem of thermal power units.First of all,considering the impact of large-scale random fluctuation of wind and light on the grid,the use of wind power and photovoltaic power generation has natural complementary characteristics,and hydropower and pumped storage have the ability to suppress wind and light fluctuations,so this paper takes wind power,photovoltaic,hydropower and pumped storage as a whole,and establishes a complementary power generation system with wind and water storage.Through the coordination and cooperation among the energy sources,the wind and rain with random fluctuations will be transformed into a stable and controllable power supply for power supply,which reduces the impact on the power grid and improves the stability of the power grid.Then,from the perspective of clean energy grid connection,considering the influence of combined operation of thermal power on the whole power grid after the complementary power generation system is connected to the power grid,the optimal scheduling model of the complementary power generation system thermal power is established.Based on the generation policy of renewable energy preferentially accessing to the grid,the complementary system is fully purchased after being connected to the grid,and the remaining load is borne by the thermal power unit.The complementary generation system takes the minimum fluctuation of output power and the change of tracking load curve as the objective function,and calculates the generalized load value according to the arrangement of wind and water storage output under different objective functions,that is,the residual load that the thermal power unit needs to bear.Then taking the minimum total cost of thermal power unit as the objective function,the output value of each thermal power unit is obtained.Through a large number of simulations,it is verified that the influence of wind and light grid connection on thermal power unit can be reduced on the basis of fully absorbing wind power and photoelectric power.Finally,from the perspective of energy conservation and emission reduction,considering that the traditional thermal power unit operation not only brings greenhouse effect,but also aggravates the threat of fossil energy depletion.Therefore,this paper proposes:on the one hand,the traditional thermal power unit is transformed into a carbon capture unit by using carbon capture technology to avoid the direct emission of CO₂into the atmosphere;on the other hand,the large-scale clean energy grid connection is used to reduce the consumption of fossil energy,so the optimal scheduling model of complementary power generation system carbon capture is established.Based on the known optimal scheduling results of the complementary generation system,the model takes the maximum net revenue as the objective function.The simulation results show that the carbon capture unit can not only effectively reduce the volatility of new energy,avoid the impact of wind and light grid connection on the power grid,but also significantly reduce the intensity of carbon emissions,which is of great significance for energy conservation and emission reduction of electric power.