Design of Discrete Optimal Multirate-Output Controllers Applied to a Hydrogenerator Power System

摘要

In the present work an H . -control technique is presented and applied to the design of optimal multirate-output controllers. The technique is based on multirate-output controllers (MOCs) having a multirate sampling mechanism with different sampling period in each measured output of the system. The proposed technique relies on multirate-output controllers. Its main feature consists in reducing the original problem, to an associate discrete H ∞ -control problem for which a fictitious static state feedback controller is to be designed. The proposed H . -control technique is applied to the discrete linear open-loop system model which represents a 117 MVA hydrogenerator unit supplying power through a step-up transformer and a transmission line to a infinite grid and give good assurance that the controllers designed by the H ∞ -control technique may be implementable.