University of Oulu

Cascade Generalized Predictive Control—Applications in power plant control

Saved in:
Author: Benyó, Imre1
Organizations: 1University of Oulu, Faculty of Technology, Department of Process and Environmental Engineering
Format: ebook
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.7 MB)
Persistent link:
Language: English
Published: 2006
Publish Date: 2006-04-25
Thesis type: Doctoral Dissertation
Defence Note: Academic Dissertation to be presented with the assent of the Faculty of Technology, University of Oulu, for public discussion in Kuusamonsali (Auditorium YB 210), Linnanmaa, on April 28th, 2006 at 11 a.m.
Reviewer: Professor Ruth Bars
Professor Kaddour Najim


The Generalized Predictive Controller in transfer function representation is proposed for the cascade control task. The recommended cascade GPC (CGPC) applies one predictor and one cost function that results in several advantageous features:

The disturbance regulations of the inner and the outer loops can be totally decoupled;

The inner disturbance regulation is well damped, the typical overshoot of the traditional cascade control structure is avoided;

The robustness properties of the inner and the outer loops can be designed separately;

The anti-windup properties of the CGPC are exactly as perfect as in the case of the simple SISO GPC. The typical problem of the saturation in the inner loop, resulting in modeling error for the outer loop, is prevented.

The CGPC was applied as the oxygen controller of a pilot fluidized bed boiler. The investigation is based on simulation experiments and on experiments on a pilot scale boiler.

In another simulation experiment, the CGPC was applied as the temperature controller of at a steam superheater stage. The results of the experiments well illustrated the power of the proposed cascade control algorithm.

see all

Series: Acta Universitatis Ouluensis. C, Technica
ISSN-E: 1796-2226
ISBN: 951-42-8032-6
ISBN Print: 951-42-8031-8
Issue: 236
Copyright information: © University of Oulu, 2006. This publication is copyrighted. You may download, display and print it for your own personal use. Commercial use is prohibited.