Patent ID: 9587629
Date: 2017-03-07
CPC Classifications: F03D,F05B,Y02E

Claim:
1. A wind turbine system, comprising: a tower having at least one sensor mounted thereon; a plurality of blades; a rotor supported by the tower and rotatably coupled to the plurality of blades; a control unit programmed to: wherein, if the predicted tower-load-moment indicative parameter is within the design limit, then a baseline operating control model is used by the control unit for normal operation of the wind turbine system; and wherein, if the predicted tower-load-moment indicative parameter exceeds the design limit, then a non-linear tower damping model is used by the control unit to determine a non-linear variable damping coefficient to prevent damage to the tower; and wherein the non-linear damping model is configured to generate a tower damping command in phase with the current fore-aft velocity of the tower; and wherein the tower damping command comprises a blade pitch angle alteration command.