Dynamics analysis of time-delay hydro-turbine governing system with two time-scales

Abstract

Due to the existence of inertia and response time, time-delay always exists in the response of the guide vane opening and it may bring about multi time-scale effect. Therefore, time-delay modeling of hydro-turbine gov- erning system with multi time-scale is addressed to investigate the dynamical behaviors of hydro-turbine governing system. The \u00a0effects of the \u00a0multi time-scale and time-delay on the \u00a0dynamical behavior of the \u00a0proposed system are analyzed. The fast-slow characteristic of the system is discussed via numerical simulations with the change of time- scale or time-delay. Results suggest that not only the time-scale but also the time-delay have significant impact on the dynamical behaviors of the hydro-turbine governing system. \u00a0