Abstract:
The present invention relates to methods, apparatus and computer program products for controlling a wind turbine that comprises a nacelle and one or more turbine blades to reduce or prevent edgewise vibrations building up on the one or more turbine blades. It is identified 202 whether the nacelle is unable to yaw to an upwind position and initiating a corrective action 203 to prevent edgewise vibrations building up on the one or more turbine blades if the nacelle is unable to yaw to an upwind position.
Abstract:
A turbine farm comprises a plurality of individual turbines each having an auxiliary component circuit. The farm further comprises; a master transformer arranged to be coupled between each of the plurality of individual turbines and an electrical grid and an auxiliary transformer coupled between the sub-station transformer and the auxiliary component circuit in each of the individual turbines. When in use power is transmitted from the sub-station transformer back to each auxiliary component circuit.
Abstract:
A rotational positioning system in a wind turbine is provided that comprises a driven part (101), a plurality of positioning drives (102) coupled to the driven part (101), a plurality of sensors (111) each arranged to sense a load parameter indicative of the load of the respective positioning drive (102), and a load controller (112, 113, 114, 115) connected to the plurality of sensors (111). The load controller (112, 113, 114, 115) is arranged to determine a load of a respective positioning drive (102) based on the sensed load parameter, to compare said load with an expected load value, and to output a signal (115) indicative of a failure of the respective positioning drive (102) in response to the load being smaller than the expected load value.
Abstract:
An array (8) of wind turbine generators comprises a plurality of groups (9a, 9b) of generators (10a, 10b,... 10η; 11 a, 11 b,... 11 n), each group being connected to a mains electricity grid sub-station (12) by means of a respective high-voltage cable (13a, 13b); auxiliary power is required by each generator to orient the rotor blades to face the wind direction and also for other control and safety functions; this auxiliary power is normally extracted from the power generated within each wind turbine generator; during servicing, auxiliary power is supplied from neighbouring generators using dedicated low-voltage cables (14a, 14b,... 14d; 15a, 15b,... 15n; 16); in the event of a fault in the high-voltage cable connecting one of the groups of generators to the sub-station, these low-voltage cables are used to supply the generators within this group with auxiliary power from the output of one or more of the generators in the other group of generators.
Abstract:
Provided is a wind turbine that includes a tower, a nacelle, a plurality of light sources mounted within the tower and the nacelle, and a wireless lighting control system. The wireless lighting control system includes a first locally controllable switch for controlling power to the plurality of light sources and a second locally controllable switch for controlling power to the plurality of light sources. The first and second locally controllable light switches are located remotely from each other. The wireless lighting control system further includes a remotely controllable light switch located at each of one or more of the light sources. The remotely controllable switch is configured to wirelessly receive a switch-on signal generated in response to manipulation of at least one of the first and second locally controllable switches, and switch on power to the corresponding light source in response to receiving the switch-on signal.
Abstract:
A wind turbine arrangement (1) is disclosed. The wind turbine arrangement (1) comprises a main wind turbine (2) and at least one secondary wind turbine (7, 7a, 7b, 7c).The main wind turbine (2) is arranged to produce electrical power and to supply produced electrical power to an external power recipient, such as a power grid (10). The main wind turbine (2) comprises one or more power consuming internal systems, e.g., yaw system (16), control system, heating systems (13), lubrication systems (15), etc. The secondary wind turbine (s) (7, 7a, 7b, 7c) is/are arranged to produce electrical power and to supply produced electrical power to at least some of the power consuming internal system(s) of the main wind turbine(2). The secondary wind turbine(s) (7, 7a, 7b, 7c) is/are electrically disconnected from the external power recipient. The secondary wind turbine(s) (7, 7a, 7b, 7c) may constitute a backup power supply to the internal systems. Thereby it is not necessary to refuel the backup power supply, and the backup power supply is environmental friendly. This is particularly useful in offshore wind turbine arrangements (1).
Abstract:
A wind turbine arrangement comprises a main wind turbine and at least one secondary wind turbine. The main wind turbine is arranged to produce electrical power and to supply produced electrical power to an external power recipient, such as a power grid. The main wind turbine comprises one or more power consuming internal systems, e.g., yaw system, control system, heating systems, lubrication systems, etc. The secondary wind turbine (s) is/are arranged to produce electrical power and to supply produced electrical power to at least some of the power consuming internal system(s) of the main wind turbine. The secondary wind turbine(s) is/are electrically disconnected from the external power recipient. The secondary wind turbine(s) may constitute a backup power supply to the internal systems. Thereby it is not necessary to refuel the backup power supply, and the backup power supply is environmental friendly. This is particularly useful in offshore wind turbine arrangements.
Abstract:
Auxiliary power is required by each generator to orient the rotor blades to face the wind direction and also for other control and safety functions. This auxiliary power is normally extracted from the power generated within each wind turbine generator. During servicing, auxiliary power is supplied from neighbouring generators using dedicated low-voltage cables. In the event of a fault in the high-voltage cable, connecting one of the groups of generators to the sub-station, these low-voltage cables are used to supply the generators within this group with auxiliary power from the output of one or more of the generators, in the other group of generators.
Abstract:
Provided is a wind turbine that includes a tower, a nacelle, a plurality of light sources mounted within the tower and the nacelle, and a wireless lighting control system. The wireless lighting control system includes a first locally controllable switch for controlling power to the plurality of light sources and a second locally controllable switch for controlling power to the plurality of light sources. The first and second locally controllable light switches are located remotely from each other. The wireless lighting control system further includes a remotely controllable light switch located at each of one or more of the light sources. The remotely controllable switch is configured to wirelessly receive a switch-on signal generated in response to manipulation of at least one of the first and second locally controllable switches, and switch on power to the corresponding light source in response to receiving the switch-on signal.
Abstract:
A rotational positioning system in a wind turbine is provided that comprises a driven part, a plurality of positioning drives coupled to the driven part, a plurality of sensors each arranged to sense a load parameter indicative of the load of the respective positioning drive, and a load controller connected to the plurality of sensors. The load controller is arranged to determine a load of a respective positioning drive based on the sensed load parameter, to compare said load with an expected load value, and to output a signal indicative of a failure of the respective positioning drive in response to the load being smaller than the expected load value.