A Research On The Control Strategy Of Coupled Wind And Thermal Power Based On Grid Transmission Section Constraint

Recently,with the increase of global pollution,China concentrates on the construction of large-scale wind.However,not all the local wind power in wind-copious place is able to be consumed,so we need wind-thermal coupling delivery.But because of the volatility and randomness of wind power,large-scale wind power's access to grid will result in a series of problems.Therefore,the study of wind-thermal coupling control strategy has become an important issue.In this paper,the wind-thermal coupling control method for long-time and short-time scale are studied respectively.Firstly,the control method and principle of transmission section is studied.Then we study the characteristics of large-scale wind power and analyze and compare the difference of the power of the transmission section under wind-thermal power decoupling and coupling conditions.Then we use the objective function and the constraint condition to establish the mathematical model of wind-thermal coupling control and utilize the multi-objective particle swarm optimization and fuzzy entropy weight method to solve the model.So the wind-thermal coupling optimization control strategy is obtained in long-time scale.Based on the analysis of the deviation between wind power forecast and real wind power,the wind-thermal coupling optimization method is obtained in short time scale,and then the wind-thermal coupling control strategy is worked out.At last,the simulation results of wind-thermal coupling control strategy are done by PSASP simulation program,which proves the correctness and validity of the control strategy of wind-thermal power coupling.