1. Tutorial of wind turbine control for supporting grid frequency through active power control;Aho,2012
2. An active power control system for wind turbines capable of primary and secondary frequency control for supporting grid reliability;Aho,2013
3. PID controllers: Theory, design, and tuning;Åström,1995
4. Revisiting the Ziegler–Nichols step response method for PID control;Åström;Journal of Process Control,2004
5. Fuzzy gain-scheduled active fault-tolerant control of a wind turbine;Badihi;Journal of the Franklin Institute,2014