General Electric Renovables Espana, S.l.

General Electric Company

Alstom Renovables Espańa, S.l.

Thomas Jean Picard

Marc Canal Vila

Pedro Palomares Rentero

Pedro Arroyo Beltri

Shanmuga-Priyan Subramanian

Ricardo Lázaro Bosch

Saskia Honhoff

Virginie Peron

Shanmuga-Priya Subramanian

The present disclosure relates to methods () to determine a duration of a period for warming up of a power converter () of a wind turbine (). The method () comprises determining () a first indicator that is indicative of a time that the power converter () has been inactive. Further, the method () comprises determining () the period for warming up at least partially based on the first indicator. A power converter assembly is also disclosed.

System to determine a period for warming up of a power converter and related methods

The present disclosure relates to methods () for controlling and operating wind turbines (). More particularly, the present disclosure relates to methods and systems for determining a surface condition of one or more wind turbine blades () of a wind turbine (). a method comprises rotating the wind turbine rotor () under the influence of a wind in predetermined rotation conditions, wherein the predetermined rotation conditions include at least a predetermined pitch angle () of the additional wind turbine blades (). The method further comprises determining a current value of one or more parameters of the wind turbine () when rotating in the predetermined rotation conditions and comparing the current value of the one or more parameters of the wind turbine with one or more reference values () to determine the surface condition of the wind turbine blades ().

Methods and systems for determining roughness of wind turbine blades and wind turbine control

Methods () for reducing vibrations in one or more rotor blades () of a wind turbine (), when the wind turbine is in standstill conditions are provided. The method comprises measuring () one or more deformation parameters indicative of deformation of one or more blades (), determining (), at a dedicated controller () for an auxiliary drive system (), a vibration of one or more of the blades () based on the deformation parameters, wherein the dedicated controller () for the auxiliary drive system is separate from the wind turbine controller (), and generating (), at the dedicated controller (), an output signal to operate the auxiliary drive system to reduce the vibration. Also disclosed are wind turbines () which comprise a dedicated controller () configured to determine a vibration and generating an output signal to reduce the vibration, when the wind turbine is in standstill conditions.

Method for reducing vibrations in rotor blades of a wind turbine

Methods of operating a variable speed wind turbine as a function of wind speed are described. The wind turbine has a rotor with a plurality of blades and a generator. The generator has a design rotor speed which varies so as to follow a theoretical generator rotor rotational speed curve describing the rotational speed of the rotor as a function of wind speed. The method comprises determining an erosion risk condition of the blades, determining erosion damage of one or more of the blades accumulated over time and changing the rotor rotational speed from the design rotor speed as a function of the determined erosion risk condition and the determined accumulated erosion damage. Wind turbines configured to carry out such methods are also described.

Wind turbine operation

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Barcelona, Spain

Thomas Jean Picard