Dynamic economic dispatch with optimal transmission switching is proposed for wind integrated power systems to improve wind power consumption and reduce system operating costs. Firstly, an optimal model for wind power systems is introduced based on the DC power flow equation. Furthermore, in order to solve the mixed integer programming problem for large-scale power systems, a pre-screening descending dimension algorithm is proposed, which pre-screens the total transmission lines to establish the candidate breakable line set, in where the selected lines can reduce the generation and wind curtailment cost. Meanwhile, a solution strategy for the dynamic economic dispatch model is proposed. The original integrated model is solved in two stages: line pre-screening and optimal dispatch. And big-M reduction is used to further improve solution efficiency. Consequently, the effectiveness and feasibility of the proposed model and acceleration algorithm are proved in the improved IEEE24 and IEEE118 system, respectively.

Transmission switching,dynamic economic dispatch,mixed-integer programming,wind power consumption,line pre-screening