  The relevant integration of wind power into the grid has involved a
remarkable impact on power system operation, mainly in terms of security and
reliability due to the inherent loss of the rotational inertia as a consequence
of such new generation units decoupled from the grid. In these weak scenarios,
the contribution of wind turbines to frequency control is considered as a
suitable solution to improve system stability. With regard to frequency
response analysis and grid stability, most contributions introduce wind control
discuss generation tripping for isolated power systems under arbitrary power
imbalance conditions. Frequency response is then analyzed for hypothetical
imbalances usually ranged between 5% and 20%, and assuming averaged energy
schedule scenarios. In this paper, a more realistic framework is proposed to
evaluate frequency deviations by including high wind power integration. With
this aim, unit commitment schemes and frequency load shedding are considered in
this work for frequency response analysis under high wind power penetration.
The Gran Canaria Island's isolated power system (Spain) is used for evaluation
purposes. Results provide a variety of influences from wind frequency control
depending not only on the wind power integration, but also the generation units
under operation, the rotational inertia reductions as well as the available
reserves from each resource, aspects that have not been addressed previously in
the specific literature to evaluate frequency excursions under high wind power
integration.
