Power System Oscillation Damping Capability of Doubly Fed Induction Generator (DFIG)

The increasing amount of wind power generation essentially replaces the conventional synchronous generators of the power system, thereby, reducing the total inertia of the system. Reduced inertia of the system is expected to hamper the system response during contingencies. It is clear that small signal as well as transient rotor angle stability is be affected by the changing dynamics of the power grid. This paper focuses on the impact of increasing DFIG penetration and techniques to overcome the stability issues using DFIG control. The technique of using modified Rotor Side Converter (RSC) control and Grid Side Converter (GSC) control with a supplementary control loop and their capability to damp the power system oscillation have been investigated using modal analysis and non-linear time-domain analysis. The results are evaluated on Kundur two area four machine test system.