FS10 and FS15 Fast Start upgrades provide flexible operation and faster control. Fast Start’s software and hardware upgrades allow GE’s GT8, GT11N, N2 and GT13D gas turbine to reach full load with a choice of two schedule configurations:
The following modular elements will be combined in response to your existing project’s configuration.
FS10 (additional to FS15):
After consolidating all possible elements to decrease start time, Fast Start in 15 minutes (FS15) is possible without the investment of a stronger SFC, whereas Fast Start within 10 minutes (FS10) is possible with a stronger SFC.
The Fast Start upgrade makes connected systems more visible and efficient
The GT control system and sequencer will be equipped with a Fast Start Preparation Sequencer program to improve the start readiness of the turbine. It checks valve positions—and starts the fuel forwarding systems, turbine lubrication, ventilation systems, stack damper, and more.
Modernizing for HRSG purge credit
Combined control software and valve hardware systems must be modernized for the HRSG purge to activate during shutdown, followed by isolation of the fuel manifold. Depending on your fuel system, the purge credit is maintained and monitored by “proof of closure method” or “pressurized pipe section method.”
Introducing a new SFC for speed (FS10) and a start-up controller update (reserve measure for FS10/FS15)
Different settings of the start-up controller have a significant influence on start-up time. In order to decrease the acceleration of the gas turbine between 0% and 70% speed, a stronger SFC is introduced, leading to a significantly faster start time. Introduction of a new stronger SFC is only required for reaching startup time of up to 10 minutes or below.
Introducing a higher loading gradient to decrease loading time from minimum load to base load during quick loading
For FS10 and FS15 the quick loading gradients are the same. The load gradient depends on the requirement to reach a certain load related to the time constrains. The normal loading gradient is the standard gradient for the gas turbine operation.
The quick loading gradient can be up to 4 times higher than the normal gradient. The quick loading function has to be manually selected on the HMI. There is an impact on lifetime consumption during quick loading due to the higher firing temperatures.
|Maximum installed gradient||GT8B||GT8C||GT8C2||GT9||GT11N||GT11N2||GT13D|
|Loading (MW/min)||4.3||5.0||6.5||2.3||4.5 (SB)
|Fast Gradients (MW/min)||13||15||24||4.7||20 (SB)
Fast Gradients Factor (in addition to normal start)