摘要:
Method of reducing loads acting on a wind turbine yaw system in a wind turbine comprising a nacelle (2), a rotor which comprises at least one rotor blade (3) with a pitch control system and further comprising a yaw system that comprises the steps of detecting a yaw misalignment (a), enabling a yaw maneuver and performing a pitch control in order to reduce a yaw moment (Mz) acting on the wind turbine once the yaw misalignment (α) is detected and prior to enabling the yaw maneuver. Thus, when a yaw movement to reduce the yaw misalignment is commanded, the yaw moment (Mz) due to aerodynamic forces has been reduced by means of the pitch control and undesired yaw movements are prevented.
摘要:
Disclosed herein is a yaw brake system including a multi-disk member (40) disposed in an upper portion of a tower frame (30) of wind generator and including at least two disks (41, 42), and a braking member (50) disposed in a lower end of a nacelle frame (20) of the wind generator, and provided to brake yawing of a nacelle (20) by interlocking with the multi-disk member (40). In accordance with the disclosure, it is possible to prepare for buildup of equipment, such as a blade, a hub, or a nacelle (20), depending on an increase in power of wind power generation, and at the same time to more effectively brake yawing of the nacelle (20) due to a rapid change in wind direction while overcoming a limited space in the nacelle.
摘要:
A power generating apparatus of renewable energy type 1 is provided with a blade 2A, a hub 2B to which the blade 2A is attached, a main shaft 2C rotating with the hub 2B, a generator 6 configured to be driven by rotation of the main shaft, and a turning unit 150 including a driving source 152 for outputting a rotational torque of the main shaft 2C and a switching system 154 provided between the driving source 152 and the main shaft 2C and configured to switch a state of the main shaft between a turning state and a non-turning state.
摘要:
A power generating apparatus of renewable energy type 1 is provided with a blade 2A, a rotor 2 having a hub 2B and a main shaft 2C, a hydraulic pump 20 of variable displacement type configured to be driven by rotation of the rotor 2, a hydraulic motor 22 configured to be driven by operating oil pressurized by the hydraulic pump 20, and a generator 6 connected to the hydraulic motor 22. A rotor locking method for the power generating apparatus 1 includes steps of: stopping the rotor 2 by applying a braking force by at least the hydraulic pump 20 to the rotor 2; and after the step of stopping the rotor 2, locking the rotor 2 so as to immobilize the rotor 2 in a rotational direction. In the step of stopping the rotor 2, torque of the hydraulic pump 20 is changed so as to adjust the braking force applied to the rotor 2.
摘要:
The present invention relates inter alia to a hydraulic braking system. The braking system is particularly well suited for deployment in wind turbine constructions and is well suited for other constructions as well. The braking system comprises a hydraulic brake calliper (1) with a hydraulic brake piston (5) and a disc (7); the brake piston is moveable in a direction normal to surface of the brake disc to force a brake pad (11) against the surface of the disc. The brake calliper further comprises two elements (2a, 2b) protruding from a base element (3) and straddling a segment of the brake disc with a gap size there between being larger than the thickness of the disc, fastening means (6) provided in the base element for fastening the calliper to a construction, and a ledge (4). The ledge is provided in the gap between the two protruding elements at the base element, has a radial and circumferential extension relatively to the orientation of the brake disc and proceeds in between the brake piston and the fastening means to define a minimum gap size in between the two elements.
摘要:
A bearingless floating wind turbine has a tall narrow main support structure with a center of buoyancy located well above the center of gravity to provide stability to the wind turbine while supported for rotation in a body of water, a vertical axis turbine blade extends from the main support structure and rotates together under a wind, and a non-rotating shaft extends through the main support structure with a vertical axis direct drive generator connected between the main support structure and the non-rotating shaft to produce electricity when the main support structure rotates. An anchor line connected to the non-rotating shaft prevents the floating wind turbine from drifting in a body of water.
摘要:
A method detects a bird or an object flying level with a single wind turbine, using a device for radio wave detection of at least one bird or another flying object, in the form of at least one radar. The analog image from each radar is transformed into a digital image and an outer safety area and an inner safety area is defined for the image. A safety space for each radar is defined and an action is performed in the event of a detection within the safety areas.
摘要:
A wind turbine generator in which the number of components and weight of a yaw system (10A) mounted atop a tower (2) can be reduced is provided. In a wind turbine generator that is equipped with a yaw system (10A) including a yaw driving unit (30), a yaw slew ring, and a yaw brake and that rotates a nacelle mounted on the top of a tower (2) in accordance with the wind direction, the yaw slew ring is a slide bearing (20A) fixed to a nacelle base plate (12) with a substantially L-shaped-cross-section bracket (23A), and the slide bearing (20A) is configured to slidably support a flange (2a) formed at the upper end of the tower (2) with slide pads (22) held by the bracket (23A).