Hello,
The unit is Frame 6 DLN, Mark VIe control. We are currently operating our gas turbine in BASELOAD. It was noticed that during BASELOAD operation, the STATUS_FLD will not stay in "BASELOAD" and goes into "PARTLOAD" occasionally. We can observed fluctuation of FSRN and FSRT with FSRN taking over occasionally (less than 5 minutes), minor load fluctuation (less than 1 MW when operating around 38 MW). During this period, it was observed that TTRX was increasing and minor drop of TTXM (and since it is already in PARTLOAD, IGV modulated in order to bring TTXM close to TTRX). Few minutes later, TTXM will again match TTRX, FSRT will be in control again.
We have tried to select PRESELECT mode (by selecting a higher value of MW, i.e. 40 MW) and the load maintained. The STATUS_FLD still changing between "PRESELECT_LD" and "PARTLOAD" but the MW is more stable. There was no more fluctuation of TTRX and IGV will remain fully open.
We would like to know why the behavior of TTRX increase during this case and why it is not happening in PRESELECT mode? How can we ensure when in BASELOAD, we can have IGV remained fully open and have stable TTRX and load?
Appreciate your clarification
Thank you
MH Lee
The unit is Frame 6 DLN, Mark VIe control. We are currently operating our gas turbine in BASELOAD. It was noticed that during BASELOAD operation, the STATUS_FLD will not stay in "BASELOAD" and goes into "PARTLOAD" occasionally. We can observed fluctuation of FSRN and FSRT with FSRN taking over occasionally (less than 5 minutes), minor load fluctuation (less than 1 MW when operating around 38 MW). During this period, it was observed that TTRX was increasing and minor drop of TTXM (and since it is already in PARTLOAD, IGV modulated in order to bring TTXM close to TTRX). Few minutes later, TTXM will again match TTRX, FSRT will be in control again.
We have tried to select PRESELECT mode (by selecting a higher value of MW, i.e. 40 MW) and the load maintained. The STATUS_FLD still changing between "PRESELECT_LD" and "PARTLOAD" but the MW is more stable. There was no more fluctuation of TTRX and IGV will remain fully open.
We would like to know why the behavior of TTRX increase during this case and why it is not happening in PRESELECT mode? How can we ensure when in BASELOAD, we can have IGV remained fully open and have stable TTRX and load?
Appreciate your clarification
Thank you
MH Lee