Performance Comparison between Steam Injected Gas Turbine and Combined Cycle during Frequency Drops

Saeed Bahrami, Ali Ghaffari, Magnus Genrup and Marcus Thern
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Saeed Bahrami: Department of Mechanical Engineering, K.N. Toosi University of Technology, Pardis Street, Vanak Square, Tehran 19991 43344, Iran
Ali Ghaffari: Department of Mechanical Engineering, K.N. Toosi University of Technology, Pardis Street, Vanak Square, Tehran 19991 43344, Iran
Magnus Genrup: Division of Thermal Power Engineering, Department of Energy Sciences, Lund University, Ole Römers väg 1, Lund SE-221 00, Sweden
Marcus Thern: Division of Thermal Power Engineering, Department of Energy Sciences, Lund University, Ole Römers väg 1, Lund SE-221 00, Sweden

Energies, 2015, vol. 8, issue 8, 1-11

Abstract: Single-shaft gas turbine and its cycles are sensitive to frequency drops and, therefore, sudden change loads or large frequency dips might affect their stability. This phenomenon is related to the reduction of the air mass flow passing through the machine during the frequency dips, which might lead to an interaction between governor and temperature control loop. In this paper, the performance of the combined cycle and steam-injected gas turbine are studied during frequency dips and transient maneuvers. For this purpose, two similar units are developed based on these cycles and their performances are studied in different scenarios. The simulation results show that the steam injected gas turbine has a better performance during frequency drops and it can handle relatively larger change loads.

Keywords: combined cycle; wet cycle; STIG turbine; frequency control (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: 2015
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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