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On deloading control strategies of wind generators for system frequency regulation

Summary 
 
With the increasing penetration of wind power, the frequency stability of the grid is facing challenge. Deloaded wind generators operate at lower than the maximum available power, to create power margins for frequency regulation. In the case of frequency decrease, deloaded wind generators can contribute to frequency control by adding power. However, if the wind turbines run out of their power margins, the system suffers from instability problem. Based on analyzing the stability conditions of the existing deloading control methods, this paper proposes an improved deloading control method that enhanced both stability and effectiveness. Simulation results validate the effectiveness of the proposed method. Copyright © 2014 John Wiley & Sons, Ltd.