Participation of Doubly Fed Induction Wind Generators in System Frequency Regulation

Abstract

This paper proposes a control scheme which allows doubly fed induction wind generators (DFIWG) to participate effectively in system frequency regulation. In this control approach, wind generators operate according to a de-loaded optimum power extraction curve such that the active power provided by each wind turbine increases or decreases during a system frequency changes. The control strategy defined at the wind generator to supply primary frequency regulation capability exploits a combination of control of the static converters and pitch control, adjusting the rotor speed and the active power according to the de-loaded optimum power extraction curve. Results obtained in a small isolated system are presented to demonstrate the effectiveness of the approach.