Observer-Based Fuel Control Using Oxygen Measurement

Palle Andersen, Jan Dimon Bendtsen, Jan Henrik Mortensen, Rene Just Nielsen, Tom Søndergård Pedersen

Research output: Book/ReportReportResearch

Abstract

This report describes an attempt to improve the existing control af coal mills used at the Danish power plant Nordjyllandsværket Unit 3. The coal mills are not equipped with coal flow sensors; thus an observer-based approach is investigated. A nonlinear differential equation model of the boiler is constructed and validated against data obtained at the plant. A Kalman filter based on measurements of combustion air flow led into the furnace and oxygen concentration in the flue gas is designed to estimate the actual coal flow. With this estimate, it becomes possible to close an inner loop around the coal mill itself.
Translated title of the contributionObservatör-baseret Bränsle Reglering ved Syre Mätning
Original languageEnglish
Place of PublicationStockholm
PublisherVärmeforsk Service AB
Number of pages65
Publication statusPublished - 2004
SeriesUden navn
NumberP4-318
ISSN0282-3772

Keywords

  • Benson Boiler
  • Dynamic Model
  • Adaptive/multi-variable Control
  • Observer
  • Disturbance Rejection

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