Vestas Wind Systems A/s

Kk Wind Solutions A/s

Paw Rosenvard

Michele Lucente

Lars Helle

Tusitha Abeyasekera

Niels Erik Danielsen

David Steele

Lóránd Bede

Anders Eggert Maarbjerg

Torben Møller Hansen

Kenneth Tougaard Simonsen

Lars Brink Christensen

Carsten Lindgaard Jensen

Ghada Ali Diaa Hillawi

Laurids Givskov Jørgensen

Lars Ulrich Nielsen

Sander J Larsen

Peter Rasmussen

The application relates to an energy storage including a plurality of energy modules arranged in one or more energy module strings. A string controller is configured for controlling a current path through the energy module strings by controlling the status of a plurality of semiconductor switches. A first end of a current path is electrically connectable to a first electric system of a first electric bus via a first bus switch and to a second electric system of a second electric bus via a second bus switch. A second end of the current path is electrically connectable to a first reference potential being the same as the reference potential of the electric systems connected to the first end of the current path. An energy storage controller is configured for controlling the status of the first bus switch and of the second bus switch in dependency of the received power status.

Energy storage connected to a plurality of power busses

The present invention relates to operation of a wind turbine using a power storage unit, such as a rechargeable battery, to power a group of power consuming units during grid loss. The wind turbine comprises a number of power consuming units being grouped into at least a first group and a second group, a first electrical converter for connecting the generator to the electrical grid, and a second electrical converter for connecting the electrical generator to the power storage unit. Upon detecting an occurrence of the grid loss, the generator is operated to ensure sufficient power of the power storage unit to operate the first group of power consuming units.

Operation of a wind turbine during grid loss using a power storage unit

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.

Rotational positioning system in a wind turbine

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.

Wind turbine generators with power backup system

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 identifiedwhether the nacelle is unable to yaw to an upwind position and initiating a corrective actionto prevent edgewise vibrations building up on the one or more turbine blades if the nacelle is unable to yaw to an upwind position.

Wind turbine control

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.

Wireless lightning control system for a wind turbine

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.

Turbine farm having an auxiliary power supply

A yaw system of a wind turbine includes a plurality of motors, each motor being coupled to the nacelle for applying torque to the nacelle; a plurality of controllers, one controller for each of the motors, each controller being configured to control the respective motor and coupled to at least one other controller to transmit operation information thereto; and a yaw system controller configured to transmit control information to at least one controller of the plurality of controllers. At least one of the controllers is configured to control the respective motor based on at least one of the control information and the received operation information from the at least one other controller. Communication between the controllers of the respective motors can allow a faster response of the yaw system to yaw the nacelle according to a change of wind direction.

Growing community of inventors

Gjern, Denmark

Paw Rosenvard