首先介绍了最优控制系统综合的李雅普诺夫方法和一种简单实用的非线性系统大范围线性化方法，然后将之成功地应用于同步发电机快速汽门控制器的设计，避免了构造非线性系统李雅普诺夫函数的困难，为电力系统暂态稳定控制的研究作出了新的探索。获得的控制器完全基于当地量的反馈，易于工程上在线实现 Firstly, the Lyapunov method based on the optimal control system and a simple and practical method for large-scale linearization of the nonlinear system are introduced. Then, the method is successfully applied to the design of the quick steam valve controller of a synchronous generator, Linear system Lyapunov function of the difficulties for the power system transient stability control made a new exploration. The controller obtained is based on the feedback of the local quantity and is easy to implement on-line