Abstract: Aiming to the undesirable switching between running and stop state during the process of active power cutback according to the demands of grid operators or preset value, an active power dispatching algorithm is presented in this paper, which can smooth the wind farm output power and impulse on grid. The wind turbines are divided into two categories of controllable and uncontrollable based on their adjustable margins to the whole active power decreasing adjustment. The models for stopping sets and power dispatching are proposed. The application results indicate that the power dispatching algorithm can make the active power decreasing process accurate and smooth with less wind turbines switching between running and stopping, and reduce the real active power overshoot of wind turbines.