Vestas

About: Vestas is a company organization based out in Aarhus, Denmark. It is known for research contribution in the topics: Turbine & Wind power. The organization has 1075 authors who have published 1519 publications receiving 23285 citations. The organization is also known as: Vestas Wind Systems & Vestas Wind Systems A/S.

A wind turbine, a hub for a wind turbine and use hereof

Abstract: The invention relates to a wind turbine (1) comprising at least two blade units (31). Each blade unit (31) comprises a pitch controlled wind turbine blade (5) and at least one pitch bearing (9) including at least one outer ring (24), at least one center ring (25) and at least one inner ring (26). The wind turbine (1) further include a hub (7) comprising a mount area (6) for each of the blade units (31). This wind turbine (1) is characterized in that the mount area (6) comprise at least two concentric load tranferring surfaces (10, 11) for attaching the blade unit (31), via the at least one pitch bearing (9). The invention further relates a hub and a use hereof.

Dynamic adjustment of power plant output based on electrical grid characteristics

Abstract: Method, power plant, and computer program product for use in controlling power output by a power plant. The power plant includes a wind farm with a plurality of wind turbines, a grid power converter (such as one or more HVDC links), a sensor to measure the frequency of a power grid, and a supervisory controller. The supervisory controller implements a control algorithm that adjusts the power output from the power plant in response to the frequency of the power grid dropping below a first target frequency by changing the pitch of the blades of at least one wind turbine, increasing the level of a portion of the power contributed by at least one wind turbine, or increasing the level of the power output by the grid power converter.

Method and System for Operating a Wind Power Plant Comprising a Number of Wind Turbine Generators

Abstract: This invention relates to a method and a system for operating a wind power plant (1 ) connected to a power grid (2), the wind power plant comprising a number of wind turbine generators. The method comprises the steps of: setting up (101 ) a number of different models, each model emulating an electrical behaviour of an electrical system, such as a load or a power generating unit, connected to the power grid; detecting (102) value(s) of a number of power grid parameters; selecting (103) one of the number of models, based on a number of values out of a set comprising the detected power grid parameter value(s) and ambient parameter value(s), or based on an external command signal; in the selected model, calculating (104) electrical output values of the model, based on the detected grid parameter values; calculating (105) electrical reference values for the wind power plant, based on the calculated electrical output values of the model; and calculating (106) electrical reference values for each wind turbine generator based on the calculated electrical reference values for the wind power plant. The method may further comprise controlling (107) the wind turbine generators according to the calculated electrical reference values for each wind turbine generator.

Method and system for controlling a wind power plant comprising a number of wind turbine generators

Abstract: This invention relates to a method and a system (10) for controlling a wind power plant (20) comprising at least one wind turbine generator (21 a-n), the wind power plant being connected to a power network (30) for delivering power to the power network. The method comprises: detecting (201 ) a frequency of the power network; calculating (202) a variation rate in the detected frequency of the power network; calculating (203) a requested variation of delivered power for the wind power plant based on a value of the inertia of the wind power plant and the calculated frequency variation rate; calculating (204) a requested variation of delivered power for each wind turbine generator of the wind power plant based on the calculated requested variation of delivered power for the wind power plant and a current power level of each wind turbine generator. The resulting calculated requested power variation is then used for controlling (205) each wind turbine generator to deliver power to the network.

Wind turbine nacelle with cooler top

Abstract: The present invention relates to a wind turbine nacelle having a first face with a longitudinal extension in a wind direction, comprising a cooling device having a cooling area and extending from the first face of the nacelle, and a cover having at least one inner face, the cooling device being enclosed by the first face of the nacelle and the inner face of the cover. A first distance between at least one of the faces and the cooling area is at least 30 mm.