Research On Joint Planning And Dispatching Of Power To Gas And Carbon Capture Power Plant And Wind Power

On September 22,2020,at the 75 th UN General Assembly,China proposed that carbon dioxide emissions strive to "carbon peak" in 2030 and achieve the goal of "carbon neutrality" by 2060.There is a strong coupling relationship between social and economic development and carbon emissions,forcing the need to improve the utilization efficiency of renewable and clean energy such as wind power.However,its randomness,intermittence and anti-peak adjustment have brought extremely difficult challenges to the safe and stable operation of the power grid.Therefore,it is of great significance to carry out the research on the optimal scheduling of combined operation of electricity-to-gas-carbon capture power plants-wind power and the allocation method of electricity-to-gas capacity,which takes into account carbon trading,for improving the consumption of wind power and reducing carbon emissions.In this paper,the combined operation strategy of integrating power-to-gas technology,carbon capture power plant,and the combined operation strategy of power-to-gas(P2G)-carbon capture power plant(CCPP)absorbed by wind power and wind power is proposed.The basic components of P2G-CCPP-wind power combined operation system framework are introduced respectively,which mainly include P2 G unit,CCPP unit and wind power plant unit.The basic operation mode of the combined operation system is introduced in detail in the form of carbon flow,natural air flow and electric power flow.At the same time,the basic principle and operation cost structure of each basic participating unit are introduced.Then,an optimal scheduling model of combined operation of electricity-to-gas-carbon capture power plant and wind power is constructed,in which carbon trading adopts ladder trading price.The optimal scheduling model aims at P2 G unit cost,CCPP unit cost and wind farm unit cost,and takes the active output of carbon capture power plant,carbon capture rate and P2 G operating power as decision variables.The infeasible solution is modified into a feasible solution by using the constraint factor correction method,and a new fitness function model suitable for the artificial fish swarm algorithm is constructed by using the penalty function method.The simulation results show that the P2G-CCPP combined operation system with wind power combines the dual advantages of CCPP’s low carbon emission and P2G’s consumption of abandoned wind power,and has good environmental and economic benefits.At the same time,the environmental and economic benefits of ladder trading price and single price are compared and analyzed.The results show that the ladder price carbon trading mechanism proposed in this paper has higher advantages in improving environmental and economic benefits.Finally,aiming at P2G-CCPP-wind power combination,the idea of P2 G capacity allocation is first introduced.Then,a typical abandoned wind power modeling method based on historical data is put forward.Fuzzy C-means clustering method is used to classify the abandoned wind power in the whole year,and principal component analysis method is used to model the typical power On this basis,an optimal allocation model of electricity-to-gas capacity is proposed,which takes into account the benefit of wind abandonment.The example shows that it is necessary to model typical power,and the calculated capacity of electricity-to-gas conversion device will cause some wind abandonment,but the system benefits are improved compared with zero wind abandonment,which verifies the effectiveness of the model,and compares the P2 G capacity allocation under different wind abandonment penalty costs.