This article develops a novel nonlinear controller for the mitigation of drivetrain torsional oscillations of wind turbine generators following large disturbances. The key idea is to integrate differential geometry theory with an extended state observer. Differential geometry allows transforming the wind turbine generator nonlinear model into a simple second-order Brunovsky system, whereas the extended state observer can accurately estimate the states of the transformed Brunovsky system and compensate unknown disturbances. Simulation results show that, under various conditions in different test systems, the proposed controller achieves significant enhancements with respect to conventional approximate linearization-based controller and nonlinear sliding mode control-based method.

中文翻译：

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鲁棒非线性控制器抑制风力发电机的动力传动系统扭振

本文开发了一种新型的非线性控制器，用于减轻风力涡轮发电机在发生大扰动后的动力传动系统扭转振动。关键思想是将微分几何理论与扩展状态观测器集成在一起。微分几何允许将风力发电机的非线性模型转换为简单的二阶Brunovsky系统，而扩展状态观测器可以准确估计转换后的Brunovsky系统的状态并补偿未知干扰。仿真结果表明，与传统的基于近似线性化的控制器和基于非线性滑模控制的方法相比，该控制器在不同测试系统的各种条件下均具有显着的增强。