Optimal Power Dispatch of Wind Farms for Short-Term Power Overproduction Capability Maximizing

Recently, wind farms are required to regulate their output powers in accordance with the dispatch instructions from the transmission system operators (TSOs) at normal and provide short-term power overproduction (S-TPO) to take part in the inertial support in case of emergency supply shortage. The S-TPO capability of the wind farm is affected by the power dispatch strategy inside the wind farm. This paper proposes an optimal power dispatch model of wind farms for S-TPO capability maximizing considering the wind turbine generation (WTG) capacity and rotor speed security. The nonlinear rotor speed security constraints are converted into linear constraints by a piecewise linearization method, and the dispatch model is finally transformed to a mixed integer linear programming (MILP) problem which is easy to solve by existing solvers. The effectiveness of the proposed model is verified in a wind farm with 50 WTGs in northern China. The results suggest that the proposed dispatch method can increase the S-TPO capability of the wind farm by 6.67% compared to the existing method.