Currently, the share of combined-cycle power plants (CCPP) in the total installed power of Russia has increased due to their advantages over conventional power plants. Therefore, it is necessary to have a clear idea of how CCPPs operate in different modes. Most of the CCPPs installed in Russia were produced by foreign companies, which increases the uncertainty of data on the operation of CCPPs. Modeling of CCPPs and their operational features at large frequency excursions are discussed. Low-frequency events are considered in detail. If the compressor and the turbine are direct coupled, a frequency decrease leads to a lower compressor speed and, consequently, to reduced air supply to the combustion chamber. As a result, the air/fuel ratio is distorted, which can cause an increase in the gas temperature. To recover the temperature, the temperature controller signals to reduce the fuel supply. Thus, upon frequency decrease, the CCPP can start reducing power, which can lead to an increase in power deficit and an emergency. These processes are modeled mathematically. To prevent emergencies, an algorithm for power boosting during low frequency events is proposed. It is shown that this algorithm helps to increase the permissible power deficit, keeping the gas temperature within the permissible range.
Similar content being viewed by others
References
G. G. Olkhovsky, “Gas-turbine and combined-cycle power plants today,” Élektr. Stantsii, No. 1, 73 – 78 (2015).
L. V. Zysin, Combined-Cycle and Gas-Turbine Thermal Power Plants [in Russian], Izd. Politekhn. Univ., St. Petersburg (2010).
Scheme and Program of Development of the Unified Power System of Russia in 2013 – 2019 [in Russian]: appr. by order No. 309 of the Ministry of Energy of the Russian Federation of June 19, 2013.
Scheme and Program of Development of the Unified Power System of Russia in 2014 – 2020 [in Russian]: appr. by order No. 495 of the Ministry of Energy of the Russian Federation of August 1, 2014.
Scheme and Program of Development of the Unified Power System of Russia in 2015 – 2021 [in Russian]: appr. by order No. 627 of the Ministry of Energy of the Russian Federation of September 9, 2015.
Scheme and Program of Development of the Unified Power System of Russia in 2016 – 2022 [in Russian]: appr. by order No. 147 of the Ministry of Energy of the Russian Federation of March 1, 2016.
Scheme and Program of Development of the Unified Power System of Russia in 2017 – 2023 [in Russian]: appr. by order No. 143 of the Ministry of Energy of the Russian Federation of March 1, 2017.
Operation of the UPS of Russia in 2017: Report [in Russian], AO SO EÉS (so-ups.ru).
B. F. Reutov, V. V. Nechaev, and S. Yu. Savinova, “Combined- cycle sector of the Russian power industry: effects, problems, and state policy,” Élektr. Stantsii, No. 10, 2 – 10 (2017).
A. Bagnasco, B. Delfino, G. B. Denegri, and S. Massucco, “Management and dynamic performances of combined cycle power plants during parallel and islanding operation,” IEEE Trans. Energy Convers., No. 13(2), 194 – 201 (1998).
G. Lalor, J. Ritchie, D. Flynn, and M. O’Malley, “The impact of combined-cycle gas turbine short-term dynamics on frequency control,” IEEE Trans. on Power Systems, 20(3), 1456 – 1464 (2005).
L. Meegahapola and D. Flynn, “Characterization of gas turbine lean blowout during frequency excursions in power networks,” IEEE Trans. on Power Systems, 30(4), 1877 – 1887 (2015).
L. Meegahapola, “Characterisation of gas turbine dynamics during frequency excursions in power networks,” IET Gen. Transm. Distr., 8(10), 1733 – 1743 (2014).
L. Meegahapola and D. Flynn, “Gas turbine modelling for power system dynamic simulation studies,” in: PowerFactory Applications for Power System Analysis, Springer (2014), pp. 175 – 195.
R. Kehlhofer, B. Rukes, F. Hannemann, and F. Stirnimann, Combined-Cycle Gas and Steam Turbine Power Plants, Penn Well Publishing Company (1997).
“Dynamic models for combined cycle plants in power system studies,” IEEE Trans. on Power Systems, 9(3), 1698 – 1708 (1994).
Dynamic Models for Turbine-Governors in Power System Studies: Technical report PES-TR1, IEEE Power & Energy Society (2013).
CIGRE Technical Brochure 238 on Modeling of Gas Turbines and Steam Turbines in Combined-Cycle Power Plants, CIGRE, April (2003).
W. I. Rowen, “Simplified mathematical representations of heavy-duty gas turbines,” J. Eng. Power, 105(4), 865 – 869 (1983).
Author information
Authors and Affiliations
Corresponding author
Additional information
Translated from Élektricheskie Stantsii, No. 3, March 2019, pp. 19 – 26.
Rights and permissions
About this article
Cite this article
Polyakova, O.Y., Chusovitin, P.V. & Pazderin, A.V. Operational Features of Combined-Cycle Power Plants at Large Frequency Excursions. Power Technol Eng 53, 376–382 (2019). https://doi.org/10.1007/s10749-019-01087-9
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10749-019-01087-9