发电机励磁系统的非线性控制研究

A STUDY ON NONLINEAR CONTROL OF THE EXCITATION SYSTEM FOR GENERATORS

本文应用直接反馈线性化理论，为发电机励磁系统设计了非线性控制器，解决了电力系统的非线性特性在励磁控制器设计上的困难，使实现线性化的过程比微分几何法更加简捷．清晰．在此基础上，通过合理的实用化过程，使所设计的非线性励磁控制器达到了分散控制的要求，便于工程实现．用双ＣＰＵ系实现的微机非线性励磁控制器，对电力系统结构和工况的变化均具有很好的鲁棒性，为提高电力系统的标态稳定和暂态稳定水平提供了新的有效的控制手段．

In order to overcome the shortcomings of conventional excitation controller. This paper introduces the theory of direct feedback linearization to design nonlinear excitation controller for generators. The theory surmounts the difficulties in excitation controller design caused by the nonlinearity of power systems and makes the linearization process more straightforward than the wellknown differential geometric method. Furthermore,the nonlinear excitation controller designed above was improved to achieve decentralized control and to make it easy to realize in engineering. The microprocessor nonlinear excitation controller formed by 2--CPU systems are of better robustness against the changeability of the operating point and the configuration of the power systems. The new excitation controller provides an effective method for enhancing power system stability.