汽轮发电机组的协调控制

Coordinated Control of Turbo-generator

本文叙述用多变量频率域控制理论设计汽轮发电机组协调控制器的新方法。在输电线路发生故障时,首先通过电功率平衡抑制各变量的剧烈波动;在此基础上再用汽门励磁协调控制器镇定系统。给出了协调控制器的两种设计方法,一种基于开环传递函数矩阵的正规化;另一种基于主导特征向量的配正。计算机仿真和动态模拟实验表明,两种方法设计的控制器都能显著提高输电稳定性。

This paper describes a new approach to the design of coordinated controller of turbo-generator set using multivariable frequency-response control theory. When a transmission line fault occurs, the violent fluctuations of system variables are first suppressed with the aid of electric power equilibrium. On this basis the system is then stabilized by a valve-excitation coordinated controller. Two design methods of the coordinated controller are given. One of them is based on open-loop transfer function matrix normalization,while the other is based on dominant eigenvector alignment. Computer simulation and dynamic modelling experiments show that the controllers designed by both methods can significantly improve the stability of electric power transmission.