摘要:
The invention resides in providing a windmill for highly efficient wind power generation by enabling to efficiently rotate the windmill even in starting or at a low wind speed region by improving a blade of a vertical shaft type windmill of a lift type. In a windmill for wind power generation in which a plurality of blades are provided in parallel with a rotating shaft in a face orthogonal to the vertical rotating shaft at constant angles centering on the rotating shaft, the blade is of a blade type having a high lift coefficient at low Raynolds number and a notch portion is formed at a rear edge portion of a lower face of the blade.
摘要:
A torsionally loadable wind turbine blade (20), includes an elastic member (22) secured to a body of the wind turbine blade; and an adjuster (26) for actively displacing the elastic member (22) and torsionally deforming the blade (20) on a spanwise axis.
摘要:
Disclosed are a method and a control arrangement for frequency regulation of an electrical grid operatively coupled with at least one wind turbine generator. The method includes operating the wind turbine generator to consume electrical power from the electrical grid. Further disclosed is a method for increasing a ramp rate capacity of a wind power plant comprising a plurality of wind turbine generators. The method includes operating at least one of the plurality of wind turbine generators to consume electrical power.
摘要:
The invention relates to an actuator arrangement (10) for moving an aerodynamic device (30) relative to a rotor blade (20) of a wind turbine, the actuator arrangement (10) comprising: an attachment portion (11) which is arranged and prepared for attaching the actuator arrangement (10) at the trailing edge section (23) of the rotor blade (20); a connection portion (12) which is arranged and prepared for connecting the aerodynamic device (30) with the actuator arrangement (10); a hinge portion (13) which connects the attachment portion (11) and the connection portion (12), wherein the hinge portion (13) enables a relative movement of the connection portion (12) with regard to the attachment portion (11) about a rotational axis which is orientated in substantially spanwise direction of the rotor blade (20); and a pneumatic actuator (14) for inducing the rotational movement (131) of the connection portion (12) relative to the attachment portion (11), wherein the movement is a reversible movement. The actuator arrangement (10) is characterized in that it is arranged and prepared for detachably connecting the aerodynamic device (30) to the connection portion (12). Furthermore, the invention relates to a movable trailing edge arrangement (40) comprising such an actuator arrangement (10) and an aerodynamic device (30). Lastly, the invention relates to a rotor blade arrangement comprising such an actuator arrangement (10) and a rotor blade (20) of a wind turbine.
摘要:
A method of controlling a movable aerodynamic device on a wind turbine rotor blade, the method comprising the steps of: determining a device position demand as a function of time, the device position demand being calculated to reduce loading in the blade; moving the device according to the device position demand; and preventing the device from operating in a predetermined frequency band.
摘要:
A vortex generator (VG) (42, 64, 80, 82, 84) mounted via a mounting plate (44, 92) to a wind turbine blade (22, 98). The VG airfoil (46) may be pivotally attached to the mounting plate by a spring hinge (48, 85) that causes the VG airfoil to passively deflect downstream in excess wind conditions to reduce lift on the blade above a predetermined wind speed. A blade pitch controller (99) sets a positive angle of attack on an outboard portion of the blade above the predetermined wind speed that compensates for lift reduction from deflection of VGs on an inboard portion of the blade. The spring hinge may provide a pivot axis (57) parallel to the suction side of the blade or normal (85) to it. A pivot limiter (58, 93/94) may hold the VG in an operating position against a spring preload, overcome by the predetermined wind speed.