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.

Wind turbine having a sensor system for detecting deformation in a wind turbine rotor blade and corresponding method

Abstract: The invention relates to a sensor system and method for detecting deformation in a wind turbine rotor blade, and particularly to a temperature compensated system and method. A first optic fiber 22 b is attached to the rotor blade such that deformation of the component acts on the first optical fiber and causes the optical path length of the fiber to change. A second optic fiber 27 is mounted loosely in the wind turbine component in such a way that it is not subject to deformation. A light source 10 , a light detector 11 , and a controller 12 input light into the two optical fibers and receive signals from them. Based on the detected light, the controller can determine the optical path length based on the light signals. In different embodiments, the light source varies the input wavelength over a range of wavelengths, provides a multi wavelength light signal, such as a white light source, or inputs a pulsed light signal. In further embodiments, the second optical fiber may be omitted if temperature effects are not significant.

Generic 12-Bus Test System for Wind Power Integration Studies

Abstract: High wind power penetration levels into power systems requires an appropriate power system model when assessing impact on the overall system stability. The model should capture the wide range of dynamics related to the wind integration studies, such as voltage control, synchronizing power control, inertial response, frequency control, damping of electromechanical oscillations, balanced and unbalanced fault management, etc. Hence, the power system components: conventional power plants with controls, transmission lines, transformers and loads should be represented accurately to achieve realistic power system characteristics. Additionally, the power system model should be simple and computationally manageable in order to simulate multiple scenarios with different control parameters in a reasonable time. In this paper, a generic power system model is presented in order to comprehend the wind integration studies with different penetration scenarios.

A wind turbine arrangement with a main wind turbine and at least one secondary wind turbine

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.

Disablement of wind turbines in a wind park

Abstract: Embodiments of the invention generally relate to wind turbine generators, and more specifically to the deactivation of wind turbines in a wind turbine park. A wind park controller may be configured to retrieve data indicating fatigue experienced by each wind turbine of the wind turbine park, and deactivate those turbines determined to be the most fatigued, thereby increasing the lifetime of turbines in the wind turbine park.

Control of reactive power in a wind power plant

Abstract: The invention relates to a method for controlling injection and absorption of reactive power in a wind power plant (WPP). In addition to wind turbine generators (WTG), the wind power plant comprises reactive power regulating devices, such as MSU and STATCOM devices. The reactive power regulating devices are controlled by wind power plant controller so that the combined amount of reactive power produced by the wind turbine generators and the reactive power regulating devices satisfies a desired amount of reactive power. In case of communication fault between the power plant controller and one of the reactive power regulating devices, the power plant controller is reconfigured so as to compensate the capability of the reactive power regulating device to inject or absorb the amount of reactive power.