Voltage regulation of wind farms equipped with variable-speed doubly-fed induction generators wind turbines

This paper presents a new technique for regulating grid-connected wind farms terminal voltage. The wind farm under investigation is assumed equipped with doubly-fed induction generators (DFIGs). The proposed technique is based on using the grid-side converter to regulate the farm's terminal voltage rather than using the rotor-side converter to achieve this task. Description for the studied system with the used dynamic modeling equations and detailed illustrations for the control loops block diagrams are presented. Simulation results for different operating conditions are also presented to reveal the accuracy of the proposed technique. Finally, Corresponding simulation results under unity power factor operation conditions are presented to demonstrate the effectiveness of the control technique.