| 摘要 |
<p>Disclosed is a horizontal axis wind turbine including: a rotor (3, 4a - 4c); a nacelle (2); a tower (1); an independent pitch control device (12a); and a yaw control device (15a), wherein the horizontal axis wind turbine is an up-wind type one including a waiting mode, wherein (a) the independent pitch control device (12a) performs a first step of changing all the blades (4a - 4c) to be in feathering states when the wind speed exceeds the predetermined value, a second step of changing the blades (4a - 4c) to be in reverse feathering states one by one sequentially, and a third step of holding all the blades (4a - 4c) in the reverse feathering states, and (b) the yaw control device (15a) controls a yaw brake to take a braking value allowing the yaw rotation when the wind speed exceeds the predetermined value, wherein the rotor (3, 4a - 4c) is allowed to swing to a leeward side of the tower (1) by executing the control operations (a) and (b) as the waiting mode.</p> |
