Abstract:
A cone shaped pin (16) for tower wall attachment is disclosed. The pin comprises a cone (22) with a first head (23) and a second head (24), the first head is larger than the second head. The pin further comprises an internal hole (18a) which is at least accessible from the second head. A system (15) for tower wall attachment and a method for mounting the system are also disclosed. In the case of using the system comprising the pin, tower wall attachment is better and safer than that in the art, and welding is avoid, thus greatly simplifies the process of fixing and improves the performance of the tower.
Abstract:
Disclosed is a method of evaluating (100) performance of a specific wind turbine generator (WTG) (11) amongst a set of wind turbine generators (WTGs) (23). The method may comprise the following acts: measuring (110) actual power production (31) of the specific WTG; receiving (120) a set of data (40, 41) comprising control settings (50) from the specific WTG and at least one set of data (40, 42) comprising control settings from at least one of the other WTGs (12) in the set of WTGs; estimating (130) estimated power production (33) of the specific WTG as a function of the received set of data from the specific WTGs and the received at least one set of data from at least one of the other WTGs; comparing (140) the actual power production to the estimated power production. The act of estimating estimated power production is based on a computer implemented evaluation (200). Also disclosed is a wind turbine evaluating system.
Abstract:
A wind turbine (2, 3), a wind turbine farm (1), and a method of operating a wind turbine (2, 3) are disclosed. The wind turbine (2, 3) comprises a wind turbine tower (4) and a nacelle (5) with a rotor. A yaw control system (12) is used to yaw the nacelle (5) relative to the wind turbine tower (4) in order to correct any yaw errors (37). A first parameter (20) is measured on the wind turbine (2, 3) and used to determine a first yaw angle (32) for maximum power production. A second parameter (22) is measured on a unit positioned separately from the wind turbine (2, 3) which is then transmitted to the wind turbine (2, 3). The second parameter (22) is used to determine a second yaw angle (33) for maximum power production. A yaw error (37) is determined using the first and second yaw angles and a corrective yaw action is triggered if the yaw error (37) exceeds a threshold.
Abstract:
A system for operating a wind turbine farm, comprising a plurality of wind turbines (1) having at least one ambient sensor (7) and optionally at least one operating sensor (9). The wind turbines are in communication with a remote control unit(2) which in turn is connected to at least one database(3) in which the ambient data and, optionally, the operating data are stored. The remote control unit(2) selects an upwind wind turbine and determines a first power output thereof, and further selects a downwind wind turbine and determines a second power output thereof. The remote control unit(2) determines a relationship between the first and second power outputs which is then used to determine a reduced operating level of the selected upwind wind turbine. A method thereof is also provided.
Abstract:
A system (1, 2) adapted for operating generator (4) performs a re-magnetisation of permanent magnet poles (6) in a generator operating in a nacelle (102) of a wind turbine (100). The system (1, 2) is adapted for re-magnetising one or more permanent magnets (8). Hereby, it is possible to achieve a re-magnetisation of permanent magnet poles (6) in generators (4). In normal operation, re-magnetisation should not be necessary, but in situations where a short cut of the electric connections of the generator (4) has been performed one or more of the permanent magnets (8) can have lost their magnetisation.
Abstract:
A generator (2) comprises at least one stator (4) and at least one rotor (6). The generator (2) comprises a plurality of permanent magnetic poles (8). The rotor (6) rotates relative to the stator (4). The stator (4) or the rotor (6) comprises magnetic coils (12). The rotation of the rotor (6) generates electric current in the magnetic coils (12). The permanent magnetic poles (8) are fastened to the back iron of the rotor (6) or the stator (4). The permanent magnetic poles (8) are held in place at the back iron by a nonmagnetic cover (14), which is fastened to the back iron by press bars (16), which are fixed to the back iron by fastening means (18). Hereby, a highly effective fastening of the permanent magnetic poles (8) towards the back iron can be achieved. The generator (2) has a perfect operation for a long period of time which is necessary if the generator (2) is to be used in a wind turbine.
Abstract:
Disclosed are a method and a system of evaluating operation (100) of at least one wind turbine generator (WTG) (1) in a set of wind turbine generators (WTGs) controlled by at least one controller (20) operating the WTG based on at least one set of settings (30). The method may comprise the following acts: monitoring operation (110) of at least one WTG; monitoring a set of settings (120) used by the controller (20) operating the at least one WTG; detecting (13) a change in the settings (132) from the monitored set of settings and recording a time-of-change (135) of the detected change in the settings; and determining an interrelationship (140) between change in the operation (134) and change in the settings before and after the detected time-of-change.
Abstract:
A berthing system is arranged on a vessel and arranged for connection to a boat landing comprising a landing area and vertical fender bars, which berthing system comprises at least the following elements: - a clamping mechanism for mooring the vessel to the fender bars,- a vessel fender comprising shock absorbers- a hydraulic system for activation and deactivation and controlling the elements of the berthing system when mooring and demooring,- a gangway for connecting the vessel with the landing area. The clamping mechanism and the vessel fender constitute a first unit. The first unit is connected to the vessel via frame hinges having a horizontal axis of rotation. First hydraulic cylinder-piston units are arranged between the vessel and a frame of the first unit. The clamping mechanism comprises clamps with jaws for pinching around the fender bars and being activated by second hydraulic cylinder-piston units arranged between the frame of the first unit and the jaws for fixation of the first unit in a fixed position in relation to the landing area at least during a part of the mooring. Said first hydraulic cylinder-piston units are arranged for simultaneously fixation of the first unit in a fixed position in relation to the vessel at least during said part of the mooring.
Abstract:
Blade replacement and installation tool for a wind turbine (1), comprising a lever arm (9) with a first end (10) and a second end (11), where the tool further comprises: at least one gear motor (12), one bearing (13) and one gear ring (14) which are relatively arranged at the first end (10) of the lever arm (9), the gear motor (12) being fixed to the lever arm (9) and the gear ring (14) being configured for installation on a hub, where the gear ring (14) is geared with the at least one gear motor (12), where the bearing (13) is positioned between the gear ring (14) and the lever arm (9) and where a flexible connection member (15) is arranged at the second end (11) of the lever arm (9) configured for fixation to a ground fixation point, whereby a less complicated, easier to use and much safer tool for operating a wind turbine (1) is achieved.
Abstract:
Method and system for operating a wind turbine farm, comprising a plurality of wind turbines (1) having at least one ambient sensor (8) and at least one operating sensor (10). The wind turbines (1) are in communication with a control unit (2), which in turn is connected to at least one database (3) in which the ambient data and the operating data are stored. The control unit (2) determines a desired first control parameter (11) for controlling a selected wind turbine. A second control parameter (12) is then calculated based on the first control parameter (11) using a relationship (13) between a first operating parameter (11) and a second operating parameter (12). This relationship (13) and a normal second control parameter are used to generate a reduced second control parameter (12) which is transmitted to the selected wind turbine. The control unit (2) monitors the change of the first operating parameter (11) to determine when the selected wind turbine has reached the reduced operating level.