Robust control of hydro turbine speed governor

This paper presents the design of the μ robust performance of a hydro Turbine speed governor. It can be used to solve the μ robustness problems, which can't be done by the conventional H
_∞
robust performance designs. High frequency oscillation and large amplitude of output and control variable of the control system are exhibited by a conventional H
_∞
robust performance design method. It is pointed out that the design of the robust performance can be formulated as a optimization μ-synthesis method, if the uncertainty weighting function and the performance weighting function are revised appropriately. The selections of the weighting functions are studied and the optimization μ-synthesis robust PI controllers are solved. The simulation results show that the proposed method is valid. The realization of the controllers doesn't involve extra cost to the control equipment in existence.