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Träfflista för sökning "WFRF:(Ghaffari Ali) srt2:(2010-2014)"

Sökning: WFRF:(Ghaffari Ali) > (2010-2014)

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1.
  • Bahrami, Saeed, et al. (författare)
  • Identifying a simplified model for heavy duty gas turbine
  • 2014
  • Ingår i: Journal of Mechanical Science and Technology. - : Springer Science and Business Media LLC. - 1738-494X .- 1976-3824. ; 28:6, s. 2399-2408
  • Tidskriftsartikel (refereegranskat)abstract
    • A dynamic model was developed for long-term simulation of a heavy duty gas turbine. The model includes the essential control algorithm of the gas turbine as well as the most common outputs and other important intermediate variables. Control algorithm details, such as wind up protection and load limiter algorithm which have large effect on gas turbine transient behavior, are included. The model parameters are identified by applying genetic algorithm and least squares algorithm on regular operational data from a real plant to better match the model response to the real plant. The simulation results have been validated with real plant data and shown to have valid accuracy for many engineering applications.
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2.
  • Bahrami, Saeed, et al. (författare)
  • Improving the Transient Performance of the Gas Turbine by Steam Injection during Frequency Dips
  • 2013
  • Ingår i: Energies. - : MDPI AG. - 1996-1073. ; 6:10, s. 5283-5296
  • Tidskriftsartikel (refereegranskat)abstract
    • Single-shaft gas turbines are sensitive to frequency changes which might affect the grid stability during large frequency drops. This paper presents a new control system that uses steam injection as an auxiliary input to improve the transient performance of the gas turbine during frequency drops. Steam injection is beneficial because it reduces the peak temperature in the combustion chamber and augments the output power by increasing the mass flow through the turbine. The use of this auxiliary input is based on the event-based control approach. It means that during the frequency drop, the controller exploits the steam injection to help the main control loop recover the frequency and when the frequency reaches its predefined value, the system will return to its normal operation. The performance of the proposed control algorithm is investigated under different scenarios and the results show that the application of steam injection improves the performance of the regular control algorithm significantly, especially near full load condition.
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  • Resultat 1-2 av 2
Typ av publikation
tidskriftsartikel (2)
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refereegranskat (2)
Författare/redaktör
Ghaffari, Ali (2)
Thern, Marcus (2)
Bahrami, Saeed (2)
Sadati, S. Hossein (1)
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Lunds universitet (2)
Språk
Engelska (2)
Forskningsämne (UKÄ/SCB)
Teknik (2)

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