WIND TURBINE CONTROL HAVING A LIDAR WIND SPEED MEASUREMENT APPARATUS

摘要

A wind turbine is provided having a lidar wind speed measurement apparatus (10, 16, 18) for achieving wind control. The lidar apparatus is arranged to scan the area (30) in front of the wind turbine so as to generate a measurement of the wind speed across the wind field. The lidar apparatus may be located in the hub (6) of the wind turbine and the look direction (32a, 32b, 32c) inclined away from the rotational axis so that rotation of the hub (6) ensures scanning. Preferably the lidar apparatus has a plurality of look directions (32a, 32b, 32c) so as to increase the scanning rate. This may be achieved by having a number of dedicated lidar systems and/or by using multiplexed lidars. Measurement of the wind field allows improved control of the wind turbine giving efficiency and reduced wear benefits.