| 主权项 |
1. A method implemented on a wind farm having a plurality of spatially distributed wind turbines for improving power production efficiency, comprising:
storing data indicative of a layout of the wind farm, the layout comprising spatial relationships of the plurality of spatially distributed wind turbines of the wind farm including a first wind turbine of the wind farm and a neighboring wind turbine of the wind farm; receiving a wind measurement comprising a wind direction impinging on the first wind turbine of the wind farm; determining by a processor a misalignment of the first wind turbine with respect to the wind direction, wherein the misalignment is adapted to steer a wake of the first wind turbine away from the neighboring wind turbine of the wind farm, wherein the determining by the processor of the misalignment of the first wind turbine with respect to the wind direction is configured to provide a variable degree of avoidance by the neighboring wind turbine of the wake of the first wind turbine based on the stored spatial relationships of the first wind turbine relative to the neighboring wind turbine, wherein the processor determines a deflection angle of the wake based on φ=0.6αθ, where “a” is the axial induction factor and θis a degree of the misalignment of the first wind turbine relative to the wind direction impinging on the first wind turbine; and activating a wake steering control for the first wind turbine by producing a control signal adapted to implement the misalignment of the first wind turbine with the wind direction, wherein the wake steering control is adapted to produce a control signal that directs the first wind turbine to yaw in a positive direction when the wind direction is impinging at a negative angle, and to yaw in a negative direction when the wind direction is impinging at a positive angle, wherein the yaw angle in the positive direction comprises an angle of approximately +70° when the neighboring wind turbine is located at a distance of approximately 4D downstream from the first turbine and the wind direction is impinging on the first wind turbine an angle of approximately 0°, where D represent units of diameter, wherein when the yaw angle in the positive direction is approximately +70°, the wake of the first wind turbine fully avoids the neighboring wind turbine, wherein the yaw angle in the negative direction comprises an angle of approximately −70° when the neighboring wind turbine is located at the distance of approximately 4D downstream from the first turbine and the wind direction is impinging on the first wind turbine at a an angle of approximately 0°, wherein when the yaw angle in the negative direction is approximately −70°, the wake of the first wind turbine fully avoids the neighboring wind turbine. |
