One approach to temperature distribution control in thermal power plant boilers

Optimization of the combustion control process in a tangentially fired pulverized coal boiler, to achieve uniform temperature distribution, is discussed in the paper. This issue is even more critical in those thermal power plants which are not equipped with modern systems for combustion enhancement,...

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Vydáno v:Automatika Ročník 61; číslo 2; s. 273 - 283
Hlavní autoři: Marjanović, Aleksandra, Vujnović, Sanja, Ðurović, Željko
Médium: Journal Article Paper
Jazyk:angličtina
Vydáno: Ljubljana Taylor & Francis 02.04.2020
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Témata:
Adaptive control
adaptive PI control
Boilers
Combustion control
Controllers
Dynamic models
Electric power distribution
Electric power generation
Optimization
Power plants
Pulverized coal
Recursive methods
Self tuning
Self-tuning controllers
system identification
Temperature
Temperature distribution
temperature distribution control
thermal power plant
Thermal power plants
Thermoelectricity
weighted recursive least squares algorithm
ISSN:0005-1144, 1848-3380
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Shrnutí:Optimization of the combustion control process in a tangentially fired pulverized coal boiler, to achieve uniform temperature distribution, is discussed in the paper. This issue is even more critical in those thermal power plants which are not equipped with modern systems for combustion enhancement, such as low NOx burners. Research has shown that the temperature distribution inside the boiler of such power plant can be controlled by adjusting firing, through coal redistribution among the mills. Furthermore, disturbed flame symmetry (i.e. non-uniform temperature distribution in the boiler) is reflected in a large difference between the output temperatures measured on the left and right sides of the boiler. Given the non-stationary conditions typical of thermal power plant boilers, an adaptive control approach is proposed, based on PI controllers which are very popular in industry and widely accepted. Self-tuning of the PI controllers is based on dynamic model parameters derived applying the weighted recursive least squares (WRLS) method to real data recorded at Nikola Tesla B thermal power plant in Serbia, whose nominal power is 650 MW. The same model was later used to test the proposed control approach.
Bibliografie:ObjectType-Article-1
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content type line 14
239870
ISSN:0005-1144
1848-3380
DOI:10.1080/00051144.2020.1733792