转桨式水轮机转轮叶片离散调节系统稳定性分析

Stability of Discrete Regulating System of Kaplan Runner Blades

本文针对转桨式水轮机协联装置发展的趋势—微机数字协联,在建立连续系统数学模型的基础上,采用数字控制系统的Z变换法得到了转轮叶片离散调节系统的特征方程式。通过对特征方程做双线性变换,以协联关系放大系数K_(?)为变量,按劳斯稳定判据分析了系统的稳定性,给出了使调节系统稳定的K_φ值变化范围。

In accordance with the trendy in the development of on-cam device of Kaplan turbine, i.e.the microcomputer digital on-cam device, this paper analyzed the stability of discrete regulating system of Kaplan runner-blades. And then, the range of variation for the vajue of K_φ (amplification of on-cam relation) guaranteeing the stability of the regulating system was given.