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Direct regulation of large speed excursions for variable speed wind turbines
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TLDR
In this article, a pitch controller for a 1 MW variable speed wind turbine is proposed, which directly responds to a strong gust by pitching the rotor blades at the maximum permissible rate, by exploiting the maximum capability of the actuation system.Abstract:
In above rated wind speed the pitch control system of a pitch regulated variable speed wind turbine
aims to maintain the rotor speed within a permitted range. However, this requirement can be difficult to satisfy
during extreme gusts with conventional controllers, particularly for large-scale machines where the pitch actuation
capability may be quite limited. This paper investigates the design of a pitch controller for 1 MW variable speed
turbine which directly responds to a strong gust by pitching the rotor blades at the maximum permissible rate,
thereby exploiting the maximum capability of the actuation system. The performance assessed and compared to
that of a conventional pitch controller by simulation studies.read more
Citations
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Stability and control of wind farms in power systems
TL;DR: In this article, the simulation model of a controller that enables an active-stall wind turbine to ride through transient faults is described and the turbine shall be able to sustain operation in case of such faults.
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Wind turbine operational method
TL;DR: In this paper, the authors present a variable speed wind turbine blade pitch control method for extreme gusts of wind, characterized by the fact that it is comprised of the following steps: a) detection of the presence of an extreme gust of wind; b) performance of a sudden increase in pitch within the range of 6 to 14 degrees at the maximum speed permitted by the wind turbine speed control mechanisms; c) vary the generator speed to avoid an increased acceleration of the generator which could make a subsequent step b) necessary.
DissertationDOI
Modeling and control of a wind turbine as a distributed resource in an electric power system
TL;DR: In this article, a model of a complete open-loop wind turbine system consisting of a rotor, a gearbox and a three-phase ac generator was developed, and it was used as a basis for the design of a controller for the wind turbine.
Patent
Method of functioning of aerogenerator
TL;DR: In this article, the authors present a method of operation of an aerogenerator of variable velocity comprising means of control of blade pitch on the occurrence of extreme gusts of wind, characterised in that it comprises the following steps: a) detecting the presence of an extreme gust of wind; b) executing a rapid increase in angle of attack within a range from 6 to 14 degrees at the maximum velocity permitted by the means of pitch control of the blades of such a generator; c) altering the velocity of the generator to prevent substantial acceleration of such generator possibly making necessary a subsequent
Dissertation
Minimisation of the wind perturbations impact on the generation of electricity by variable speed wind turbines
TL;DR: In this paper, a pitch regulated variable speed wind turbine simulation model is presented to study the impact of wind perturbations on the whole system and the results in simulation and test bench trials show that advanced control laws improving the behaviour of a pitchregulated variable speed (VSS) wind turbine can improve the power quality supply, energy efficiency and robustness of the control robustness.
References
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Global gain-scheduling control for variable speed wind turbines
TL;DR: In this article, it was shown that the nonlinear rotor aerodynamics of typical medium and large-scale variable speed wind turbines exhibit a separability property similar to that previously established for constant-speed wind turbines.