TY  - JOUR
AU  - Stevanović, Vladimir
AU  - Ilić, Milica
AU  - Djurović, Željko
AU  - Wala, Tadeusz
AU  - Muszynski, Slawomir
AU  - Gajić, Ivan
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2939
AB  - Coal-fired thermal power plants (TPPs) had been generally designed to cover base loads of electricity consumption. Nowadays, they should be flexible to participate in the primary frequency control of electric system, especially because of increased number of wind and solar plants with intermittent electricity production. In this paper a new method for the primary power control in TPPs is presented, based on the feedwater flow rate changes between the feedwater heaters (FWHs) and an additional high pressure economizer. The achieved primary power control reserve is demonstrated by measurements at the lignite-fired 650 MWe TPP after its retrofit by the installation of the high pressure economizer in parallel with FWHs. In addition, the TPP transient operation during the primary control are simulated and analyzed with the developed thermal-hydraulic model of the steam turbine heat regeneration system. The control reserve of approximately 10 MWe is shown both by measured data and results of numerical simulations. The control reserve is originally provided by the fresh steam throttling in front of the turbine, but this throttling can be reduced by the application of the new method. The rates of change of wall temperatures of FWHs tubes are within allowed limits during the transients.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Energy
T1  - Primary control reserve of electric power by feedwater flow rate change through an additional economizer - A case study of the thermal power plant "Nikola Tesla B"
EP  - 798
SP  - 782
VL  - 147
DO  - 10.1016/j.energy.2018.01.102
ER  - 

@article{
author = "Stevanović, Vladimir and Ilić, Milica and Djurović, Željko and Wala, Tadeusz and Muszynski, Slawomir and Gajić, Ivan",
year = "2018",
abstract = "Coal-fired thermal power plants (TPPs) had been generally designed to cover base loads of electricity consumption. Nowadays, they should be flexible to participate in the primary frequency control of electric system, especially because of increased number of wind and solar plants with intermittent electricity production. In this paper a new method for the primary power control in TPPs is presented, based on the feedwater flow rate changes between the feedwater heaters (FWHs) and an additional high pressure economizer. The achieved primary power control reserve is demonstrated by measurements at the lignite-fired 650 MWe TPP after its retrofit by the installation of the high pressure economizer in parallel with FWHs. In addition, the TPP transient operation during the primary control are simulated and analyzed with the developed thermal-hydraulic model of the steam turbine heat regeneration system. The control reserve of approximately 10 MWe is shown both by measured data and results of numerical simulations. The control reserve is originally provided by the fresh steam throttling in front of the turbine, but this throttling can be reduced by the application of the new method. The rates of change of wall temperatures of FWHs tubes are within allowed limits during the transients.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Energy",
title = "Primary control reserve of electric power by feedwater flow rate change through an additional economizer - A case study of the thermal power plant "Nikola Tesla B"",
pages = "798-782",
volume = "147",
doi = "10.1016/j.energy.2018.01.102"
}

Stevanović, V., Ilić, M., Djurović, Ž., Wala, T., Muszynski, S.,& Gajić, I.. (2018). Primary control reserve of electric power by feedwater flow rate change through an additional economizer - A case study of the thermal power plant "Nikola Tesla B". in Energy
Pergamon-Elsevier Science Ltd, Oxford., 147, 782-798.
https://doi.org/10.1016/j.energy.2018.01.102

Stevanović V, Ilić M, Djurović Ž, Wala T, Muszynski S, Gajić I. Primary control reserve of electric power by feedwater flow rate change through an additional economizer - A case study of the thermal power plant "Nikola Tesla B". in Energy. 2018;147:782-798.
doi:10.1016/j.energy.2018.01.102 .

Stevanović, Vladimir, Ilić, Milica, Djurović, Željko, Wala, Tadeusz, Muszynski, Slawomir, Gajić, Ivan, "Primary control reserve of electric power by feedwater flow rate change through an additional economizer - A case study of the thermal power plant "Nikola Tesla B"" in Energy, 147 (2018):782-798,
https://doi.org/10.1016/j.energy.2018.01.102 . .