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

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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.

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Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Energy Engineering

Keywords

  • combined cycle, wet cycle, STIG turbine, frequency control
Original languageEnglish
Pages (from-to)7582-7592
JournalEnergies
Volume8
Issue number8
Publication statusPublished - 2015
Publication categoryResearch
Peer-reviewedYes