Leithead, W.E. and Leith, D. J. and Hardan, F. and Markou, H.
Direct regulation of large speed excursions for variable speed wind turbines.
Proceedings of European Wind Energy Conference .
In above rated wind speed the pitch control system of a pitch regulated variable speed wind turbine
aims to maintain the rotor speed within a permitted range. However, this requirement can be difficult to satisfy
during extreme gusts with conventional controllers, particularly for large-scale machines where the pitch actuation
capability may be quite limited. This paper investigates the design of a pitch controller for 1 MW variable speed
turbine which directly responds to a strong gust by pitching the rotor blades at the maximum permissible rate,
thereby exploiting the maximum capability of the actuation system. The performance assessed and compared to
that of a conventional pitch controller by simulation studies.
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