Wind turbine control having a lidar wind speed measurement apparatus
First Claim
1. A wind turbine having a lidar means for determining wind speed wherein the lidar means is mounted in the hub of the turbine and has at least one look direction inclined to the axis of rotation thereof such that as the hub rotates the lidar means scans the area in front of the turbine, said lidar means comprising a multiplexed lidar, said multiplexed lidar comprising:
- at least one laser source; and
a plurality of sets of transmit/receive optics, each set of transmit/receive optics having a different look direction.
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Accused Products
Abstract
A wind turbine is provided having a lidar wind speed measurement apparatus for achieving wind control. The lidar apparatus is arranged to scan the area 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 of the wind turbine and the look direction inclined away from the rotational axis so that rotation of the hub ensures scanning. Preferably the lidar apparatus has a plurality of look directions 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.
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Citations
23 Claims
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1. A wind turbine having a lidar means for determining wind speed wherein the lidar means is mounted in the hub of the turbine and has at least one look direction inclined to the axis of rotation thereof such that as the hub rotates the lidar means scans the area in front of the turbine, said lidar means comprising a multiplexed lidar, said multiplexed lidar comprising:
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at least one laser source; and a plurality of sets of transmit/receive optics, each set of transmit/receive optics having a different look direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A wind turbine having a lidar for determining wind speed wherein the lidar is mounted in the rotating hub of the turbine, said lidar comprising a multiplexed lidar comprising:
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at least one laser source; and a plurality of sets of transmit/receive optics, each set of transmit/receive optics having a different look direction wherein as the hub rotates the lidar scans the area in front of the turbine. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification