基于扩张状态观测器的水轮发电机组非线性控制

提出了一种基于扩张状态观测器的水轮发电机组非线性控制。将被控对象看成是内环为非线性系统、外环为伪线性系统的多输入多输出对象，利用低阶扩张状态观测器对内环非线性系统进行动态反馈线性化，利用线性控制方法对已线性化的外环伪线性系统进行预期动态性能设计，最终可实现观测器和线性化的有机结合。计算机仿真表明：这种控制方法不仅能较好地解决开度控制和励磁控制的协调性，而且对模型的内外扰表现出了很好的适应性和鲁棒性；同时，这种控制方法严谨简单，原理直观清晰。

Nonlinear Control for Hydraulic Turbine Generator Unit Based on Extended State Observer

A new nonlinear control for hydraulic turbine generator units based on the extended state observer (ESO) is proposed. The controlled object is regarded as a class of nonlinear MIMO objects composed of a nonlinear internal-loop system and a pseudo-linear external-loop system. The dynamic feedback linearization of the nonlinear internal-loop system can be implemented by use of lower order ESO, and the expected dynamic characteristic design of the linearized external-loop system can be realized by use of linear control discipline. The simulation results show that the proposed control law is precise and simple, and its principle is clear and easy. The control approach not only can deal with the coordination of water-valve control and excitation control, but also has strong adaptability and robustness for model disturbance.