A look-ahead dispatch method accounting for improved primary frequency response

It is becoming more and more important to consider the frequency security of power system during active power dispatch, especially when large-scale wind power is integrated. This paper describes a robust look-ahead dispatch method accounting for improved primary frequency response, in which a proportional-differential controller is introduced into the conventional primary frequency control as feedback function. And an order reduction method for frequency-domain transfer function is proposed. Based on this, the time-domain frequency response characteristic is derived and incorporated into the robust look-ahead dispatch model. The simulation results on IEEE RTS system proved the effectiveness of the proposed method on improving the frequency response characteristics and increasing the penetration level of renewable resources.