Predicted motion wind turbine tower damping
AssigneeUnited Technologies Corporation
InventorsKermit I. Harner, John P. Patrick, Joseph M. Kos
Life of this patent
Estimating the term…
Abstract
Damping of the primary bending mode of a tower (12) mounting a wind turbine having a control (36) for providing a pitch blade angle reference signal (40) to modulate the pitch of the turbine blades (1) through a pitch change mechanism (38) for constant power is provided by generating the pitch blade angle reference signal as the integral (104) of the summation (266) of a torque/power controlling blade pitch angle reference rate signal (98) with an estimated acceleration signal (255) generated by filtering (250, 252, 254) the blade pitch angle reference signal (40) with the following transfer function ##EQU1##
Claims3
A wind turbine system for generating electric power, comprising:
- a tower;
- a rotor disposed on said tower including blades disposed for rotation about an axis and a blade pitch angle change mechanism;
- means for providing an actual torque/power signal indicative of actual torque/power generated by said wind turbine system;
- and
- signal processing means for providing a reference torque/power signal indicative of desired generated torque/power, and for providing a blade pitch angle reference signal as a function of the difference between said actual torque/power signal and said reference torque/power signal;
- characterized by:
- said signal processing comprising means for providing said blade pitch angle reference signal as a combination of a damping signal component related to a filtered function of said blade pitch angle reference signal and a torque/power control signal component which is said function of the difference between said actual torque/power signal and said reference torque/power signal.
Dependencies are inferred from the claim text.