Active power real-time control strategy for wind farms coordinated with power system

Because of the intermittent and uncertainty of wind power, the change rate and amplitude of power system net-load increase with wind power penetration growing continuously. The prediction error of wind power generation capacity is large, so it´s difficult to quantify its impact on AGC adjustment capacity and incorporate wind power maximally. To solve the problem, an active power real-time control method for wind farms considering AGC adjustment capability limits is proposed in this paper. Base on the strategy, the net-load fluctuation of next period is estimated according to the newest wind power and load predication information, the reference power of wind farm can be determined combined with the adjustment capacity of AGC. At the same time, in order to improve the value of wind power, an additional frequency control loop is design for the down-regulated wind farms. The simulation result demonstrates the feasibility of the proposed strategy.