用直接大范围线性化方法设计发电机的励磁控制器 第一部 分基本理论

The Design of Excitation Controller for Generator by Means of the Method of Direct Linearization over Wide Range Part 1 The Basic Theory

传统的励磁控制器基本上都是按照局部线性化的模型来设计的,不能适应电力系统的要求。针对这一缺陷,本文把非线性控制理论中比微分几何法更简明、更适合于工程应用的直接大范围线性化方法引入电力系统,解决了电力系统强非线性给设计所带来的困难,并使得实现线性化的过程变得极为简捷。全文分为两个部分:第一部分叙述的是直接大范围线性化方法的基本理论,并在此基础上,提出了动态反馈补偿的概念和理论,使所设计的控制器对电力系统结构工况的多变性也能够具有很好的鲁棒性;第二部分应用第一部分的基本理论为励磁系统设计了非线性反馈补偿控制器,并针对单机无穷大系统进行了数字仿真和动模实验,从而证明了所提出方法的有效性。

The conventional excitation controllers which based on the model linearized at the operating point cann't meet the demand of the modern power systems. In order to solve the problem, a novel nonlinear system control theory, which is more straightforward in physics and concise in mathematics than the well-known differential geometric method,is introduced to the power systems in this paper. The theory surmounts the difficulties in controller design caused by the stronge nonlinearity of the power systems and make the linearization process more straightforward.The paper is divided into two sections. In section one, the basic theory of the direct linearization over wide range is illustrated. Eased on that, the concept find the theory of the dynamic compensation via feedback are presented, so that the cenrrollers designed are of better robustness against the changeability of the operating point and configuration of the power systems. In section two, the theory is applied to design s. controller.