Conventionally operated full power converter wind
plants show high short-term power output variability caused by
variable winds, and does not contribute to the power systeminertia
due to the decoupled generator speed and grid frequency. There
is, however, abundant inertial resources in wind plant rotors for
both smoothing of output power and for synthetic inertia contribution.
Together with added frequency controlling functionality, this
could facilitate inclusion of wind power in islanding systems, enabling
greater system loads and enhancing power system stability.
This paper describes modeling of power smoothing and frequency
controlling wind plants and assesses different control strategies
as well as the grid frequency performance gains achievable over
hydro powered islanding systems and over islanding systems incorporating
both hydro power and conventional wind plants. The
results show that wind plant power output could be smoothed in
the short time frame, and support frequency in both primary and
secondary frequency control timescales including droop