According to the demand of centralized control and elaborated dispatch of large-scale wind power integrated to the power grid

an active power control system for the wind farm cluster is designed based on the hierarchical dispatch of regional active powers. The system adopting a three-tier structure is subdivided into the wind power dispatch station

wind farm cluster control station and wind farm execution station. The designed scheme of interface between the master control station and wind farms in the wind farm cluster is presented. Taking the regulation performance differences of various wind farms and scattered wind turbines into account

an active power control strategy for the master control station in the wind farm cluster is then proposed to realizing online decision-making of active power control mode for wind farms and fast online calculation of active power instruction values under corresponding modes. The validity of the control strategy has been proven through simulation. The result shows that the system can realize unified dispatch and monitoring of wind farms and scattered wind turbines in the cluster. It can also make full use of the wind power acceptability while improving the economical efficiency of cluster operation. The system can effectively solve the problem of resource wasting and coordination difficulty resulting from the existing scattered control of wind farms.