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Improving the Transient Performance of the Gas Turbine by Steam Injection during Frequency Dips

Bahrami, Saeed; Ghaffari, Ali and Thern, Marcus LU (2013) In Energies 6(10). p.5283-5296
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... (More)
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. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
single-shaft gas turbine, combined-cycle, frequency control, steam injection
in
Energies
volume
6
issue
10
pages
5283 - 5296
publisher
MDPI AG
external identifiers
  • wos:000330287800019
  • scopus:84886811292
ISSN
1996-1073
DOI
10.3390/en6105283
language
English
LU publication?
yes
id
024c610b-29fc-4bea-a250-dcd05bef839f (old id 4276308)
date added to LUP
2014-01-30 11:09:51
date last changed
2019-01-06 08:42:41
@article{024c610b-29fc-4bea-a250-dcd05bef839f,
  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.},
  author       = {Bahrami, Saeed and Ghaffari, Ali and Thern, Marcus},
  issn         = {1996-1073},
  keyword      = {single-shaft gas turbine,combined-cycle,frequency control,steam injection},
  language     = {eng},
  number       = {10},
  pages        = {5283--5296},
  publisher    = {MDPI AG},
  series       = {Energies},
  title        = {Improving the Transient Performance of the Gas Turbine by Steam Injection during Frequency Dips},
  url          = {http://dx.doi.org/10.3390/en6105283},
  volume       = {6},
  year         = {2013},
}