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 method for de-icing the blades of a wind turbine and a wind turbine with a de-icing system

Abstract: The invention refers to a method for de-icing a blade of a wind turbine. The de-icing is carried out by means of stalling the wind turbine and at least to a position where enough turbulence is created to induce vibrations in the blade allowing ice to break off.

One global precise time and one maximum transmission time

Abstract: Method of controlling a wind power system comprising a plurality of system elements, said wind power system including a plurality of data processors distributed in said system elements, the method comprising the steps of: synchronizing at least a part of said data processors to at least one reference signal distributed to said data processors from a time synchronization arrangement, associating said data processors with local clock generation circuitries, wherein said local clock generation circuitries associated with data processors of a first subset of the data processors have a peak-to-peak tracking jitter higher than or equal to a predetermined threshold value and wherein a second subset of the data processors have a peak-to-peak tracking jitter less than said predetermined threshold value, controlling at least one of said system elements at least partly by means of a data processor from said first or second subset of data processors.

A bearing, a wind turbine and methods of manufacturing a bearing

Abstract: The invention relates to a bearing for a wind turbine comprising bearing rings with raceways, and at least one row of bearing balls or rollers positioned between said raceways. At least one of said raceways comprises one or more indentation areas in relation to a standard shape of the raceways. The invention also relates to a wind turbine and methods for manufacturing a bearing.

Optical transmission strain sensor for wind turbines

Abstract: The invention relates to a broad band optical strain sensing system for a wind turbine. The strain sensing system includes an optical fibre with an input at one end and an output at the opposite end. The optical fibre is provided with Bragg sensors between the input and the output. By injecting light at the input of the fibre, measuring the spectral intensity distribution of at the output of the fibre and determining spectral locations of intensity notches in the spectral intensity distribution, it is possible to determine strain values at the locations of the Bragg sensors from the transmitted light.

Lightning current transfer assembly for a wind turbine

Abstract: A lightning current transfer assembly (2) for a wind turbine (1) is arranged to transfer lightning current from a wind-turbine part (8) to another part (8) rotatable relative to it. The assembly comprises at least one electric contact arrangement (11', 11") comprising complementary contact members (12a', 12b', 12a", 12b") which provide electric connection by mechanically contacting each other while being movable relative to each; a spark gap (4) connected in series with the movement-enabling contact arrangement (11', 11"); and a spark-gap-bridging resistance (6) connected parallel to the spark gap (4). Thereby, the assembly provides at least two alternative current paths: (i) a lightning current path across the at least one electric contact arrangement and the spark gap, and (ii) a permanent-discharge current path across the at least one electric contact arrangement and through the spark-gap-bridging resistance.