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首页> 外文期刊>Renewable Power Generation, IET >Voltage/pitch control for maximisation and regulation of active/reactive powers in wind turbines with uncertainties
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Voltage/pitch control for maximisation and regulation of active/reactive powers in wind turbines with uncertainties

机译：具有不确定性的电压/变桨控制，用于最大化和调节风力涡轮机中的有功/无功功率

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This study addresses the problem of controlling a variable-speed wind turbine with a doubly fed induction generator (DFIG), modelled as an electromechanically coupled non-linear system with rotor voltages and blade pitch angle as its inputs, active and reactive powers as its outputs, and most of the aerodynamic and mechanical parameters as its uncertainties. Using a blend of linear and non-linear control strategies (including feedback linearisation, pole placement, uncertainty estimation and gradient-based potential function minimisation) as well as time-scale separation in the dynamics, the authors develop a controller that is capable of maximising the active power in the maximum power tracking (MPT) mode, regulating the active power in the power regulation (PR) mode, seamlessly switching between the two modes and simultaneously adjusting the reactive power to achieve a desired power factor. The controller consists of four cascaded components, uses realistic feedback signals, and operates without knowledge of the Cp-surface, air density, friction coefficient, and wind speed. Finally, the authors show the effectiveness of the controller via simulation with realistic wind profiles.
机译：这项研究解决了使用双馈感应发电机（DFIG）控制变速风力发电机的问题，该感应发电机建模为机电耦合的非线性系统，其中转子电压和叶片桨距角为输入，有功和无功为输出，并将大多数空气动力学和机械参数作为其不确定性。通过混合使用线性和非线性控制策略（包括反馈线性化，极点放置，不确定性估计和基于梯度的势函数最小化）以及动力学中的时标分离，作者开发了一种能够最大化控制器的控制器。最大功率跟踪（MPT）模式下的有功功率，功率调节（PR）模式下的有功功率，两种模式之间的无缝切换以及同时调整无功功率以实现所​​需的功率因数。该控制器由四个级联组件组成，使用逼真的反馈信号，并且在不了解Cp表面，空气密度，摩擦系数和风速的情况下运行。最后，作者通过仿真和逼真的风廓线显示了控制器的有效性。

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