University of Oulu

Matias Hultgren, Enso Ikonen, Jenő Kovács, Integrated control and process design for improved load changes in fluidized bed boiler steam path, Chemical Engineering Science, Volume 199, 2019, Pages 164-178, ISSN 0009-2509,

Integrated control and process design for improved load changes in fluidized bed boiler steam path

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Author: Hultgren, Matias1,2; Ikonen, Enso2; Kovács, Jenő2
Organizations: 1Outotec, Kuparitie 10, PO Box 69, FI-28101 Pori, Finland
2Systems Engineering, University of Oulu, Linnanmaa, POB 4300, FI-90014 Oulun yliopisto, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 2.2 MB)
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Language: English
Published: Elsevier, 2019
Publish Date: 2021-01-23


Integrated control and process design is considered for a power plant to obtain improved load changes in output electrical power (MWe). Fast load transitions are increasingly needed in conventional power plants, which calls for a deeper integration between the boiler and its control system. An integrated design methodology is applied to an industrial boiler steam path in this paper; no past reports of such an application exist in the literature. The methodology utilizes dynamic optimization together with performance relative gain array and closed-loop disturbance gain controllability analysis. The aim is to optimize the boiler steam storage distribution, the turbine valve operation, and the electrical power and main steam pressure controllers during different MWe ramp reference trajectories. The methodology was successful in defining closed-loop designs with excellent MWe setpoint tracking, small steam pressure disturbances and minimal steam throttling. The results also highlighted the challenges related to integrated design in power plants.

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Series: Chemical engineering science
ISSN: 0009-2509
ISSN-E: 1873-4405
ISSN-L: 0009-2509
Volume: 199
Pages: 164 - 178
DOI: 10.1016/j.ces.2019.01.025
Type of Publication: A1 Journal article – refereed
Field of Science: 213 Electronic, automation and communications engineering, electronics
222 Other engineering and technologies
214 Mechanical engineering
216 Materials engineering
218 Environmental engineering
Funding: The authors would like to acknowledge the industrial-academic cooperation between the University of Oulu and Sumitomo SHI FW Energia Oy (Varkaus, Finland). The work was partly funded by the Graduate School in Chemical Engineering (GSCE) doctoral program (Academy of Finland, Finnish Ministry of Education).
Copyright information: © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license