Excitation controller design using-control based on multirate output applied to a hydro-unit-system

Abstract EN

In this paper an H¥ -control technique is presented and applied to the design of optimal multirate-output controllers.

The technique is based on multirate-output controllers (MROCs) having a multirate sampling mechanism with different sampling period in each measured output of the system.

It relies mainly on the reduction, under appropriate conditions, of the original H¥ -disturbance attenuation problem to an associated discrete H¥ -control problem for which a fictitious static state feedback controller is to be designed, even though some state variables are not available (measurable) for feedback purposes.

The proposed H¥-control technique is applied to the discrete linear open-loop system model which represents a linear speed governor (mechanical-hydraulic type), a hydro turbine ideal version for rated speed, head etc.

and a rotational dynamic part with inertia H.