Izvorni znanstveni članak
https://doi.org/10.1080/00051144.2020.1733792
One approach to temperature distribution control in thermal power plant boilers
Aleksandra Marjanović
; School of Electrical Engineering, University of Belgrade, Belgrade, Serbia
Sanja Vujnović
; School of Electrical Engineering, University of Belgrade, Belgrade, Serbia
Željko Ðurović
; School of Electrical Engineering, University of Belgrade, Belgrade, Serbia
Sažetak
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.
Ključne riječi
Self-tuning controllers; adaptive PI control; system identification; weighted recursive least squares algorithm; thermal power plant; temperature distribution control
Hrčak ID:
239870
URI
Datum izdavanja:
16.3.2020.
Posjeta: 1.153 *