Patent ID: 9140238
Filing Date: 2015-09-22
Classification: F03D,F05B,Y02E

Abstract:
1. A method to control the operation of a wind turbine above a certain wind speed threshold value, comprising: producing electrical output power by rotating blades of the wind turbine and wherein the produced output power is fed in a grid, which is connected with the wind turbine; controlling the wind turbine by a first control loop and by a second control loop; determining the wind speed and comparing the wind speed with a certain predefined wind speed threshold value; determining wind turbulences and comparing the wind turbulences with a certain predefined wind turbulence threshold value; and activating the first control loop and the second control loop when the wind speed reaches or exceeds the wind speed threshold value, wherein the activated first control loop controls the output power in dependency of the wind speed, and wherein the activated second control loop controls a rotational speed of the rotating blades in dependency of the wind turbulences.