Power and Frequency Control in the National Power System of the 370 MW Coal Fired Unit Superstructured with a Gas Turbine

Ryszard Bartnik, Zbigniew Buryn, Anna Hnydiuk-Stefan, Marcin Szega and Tomasz Popławski
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Ryszard Bartnik: Department of Power Engineering Management, Opole University of Technology, 45-758 Opole, Poland
Zbigniew Buryn: Department of Power Engineering Management, Opole University of Technology, 45-758 Opole, Poland
Anna Hnydiuk-Stefan: Department of Power Engineering Management, Opole University of Technology, 45-758 Opole, Poland
Marcin Szega: Department of Thermal Technology, Silesian University of Technology, 44-100 Gliwice, Poland
Tomasz Popławski: Department of Electrical Engineering, Czestochowa University of Technology, 42-201 Częstochowa, Poland

Energies, 2020, vol. 13, issue 10, 1-35

Abstract: A very important task of power units with high power capacity is their participation in the control of the national power system. One of the most important questions posed at work is whether a 370 MW power unit superstructured with a gas turbine in parallel and a heat recovery steam generator be able to take part in the national power system control and if such an upgrade will be economically effective. The analysis was carried out using a proprietary and novel mathematical model. The model takes into account, among others, the influence of the ambient temperature on the parameters of the gas turbine and the changes in thermal steam parameters at its steam extractions as a result of load changes. The results of the analyses showed that it is possible for the modernized unit to participate in the power system control. It can be done only by using a gas turbine with a variable power and a shut off option. The presented results of economic calculations show that at price and cost levels assumed for calculations, the turbine gas superstructure is at the threshold of viability and the investment carries a high degree of risk.

Keywords: power unit; repowering; gas turbine; heat recovery steam generator; control of power system; economic analysis (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
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