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 prolonging and/or controlling the life of one or more heat generating and/or passive components in a wind turbine, a wind turbine, and use thereof

Abstract: The invention relates to a method for prolonging and/or controlling the life of one or more heat generating and/or passive components (8) in a wind turbine (1), by controlling the cooling down procedure of said one or more heat generating and/or passive components (8), by controlling the temperature of said one or more heat generating and/or passive components (8). The invention further relates to a wind turbine (1) and use hereof.

Dynamic thermal modelling and analysis of press-pack IGBTs both at component-level and chip-level

Abstract: Thermal models are needed when designing power converters for Wind Turbines (WTs) in order to carry out thermal and reliability assessment of certain designs. Usually the thermal models of Insulated Gate Bipolar Transistors (IGBTs) are given in the datasheet in various forms at component-level, not taking into account the thermal distribution among the chips. This is especially relevant in the case of Press-Pack (PP) IGBTs because any non-uniformity of the clamping pressure can affect the chip-level thermal impedances. This happens because the contact thermal resistances in the thermal impedance chains are clamping pressure dependent. In this paper both component-level and chip-level dynamic thermal models for the PP IGBT under investigation are developed. Both models are developed using geometric parameters and material properties of the device. Using the thermal models, the thermal impedance curves under various mechanical clamping conditions are derived. Moreover, the deformation of the internal components of the PP IGBT under operating-like conditions is investigated with the help of the thermal models and the coefficient of thermal expansion (CTE) information.

Wind turbine testing system

Abstract: A wind turbine testing system is disclosed for testing at least a part of the nacelle components of a wind turbine system when mounted on a load carrying structure of a nacelle, said wind turbine testing system comprising a test bench being arranged to hold said load carrying structure including said nacelle components, a grid simulation system comprising a power converter system and a simulation controller being arranged to be electrically coupled to at least one of said nacelle components and being adapted for providing a simulated utility grid on the basis of a power supply and at least one control signal established by said simulation controller, and a wind simulation system comprising a wind turbine shaft rotating means arranged to be coupled to a rotating part of said generator system or a generator-related system of a nacelle or a part of a nacelle located in said test bench.

A wind turbine rotor, a rotation controlling mechanism and a method for controlling at least one blade of a wind turbine rotor

Abstract: The invention relates to a wind turbine rotor comprising at least one blade and at least on pitch mechanism comprising a ring shaped motor for controlling the blade. The wind turbine rotor is characterized in that, the ring shaped motor controls the blade through gearing means of a planetary type. The invention further relates to a rotation controlling mechanism comprising, at least one ring shaped motor for controlling the rotation of at least one first part in relation to at least one second part. The rotation controlling mechanism is characterized in that, the ring shaped motor controls the relative rotation through gearing means of a planetary type. Even further the invention relates to a method for controlling at least one blade of a wind turbine rotor.

Wind turbine blade and method for controlling the load on a blade

Abstract: Wind turbine blade (1) comprising a blade body (2) and lift-regulating means (3, 7) adapted for movement in relation to the blade body (2) by at least one actuation means (4) controlled by an actuation controller (5), wherein the actuation controller (5) controls a setting of the lift-regulating means (3, 7) based on an input from a sensor (6), wherein the sensor (6) is a force sensor adapted for sensing a force from a wind flow acting on the lift-regulating means (3, 7), whereby a wind turbine blade with fast-responding lift-regulating means is provided.