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Dear CSA, Your explanation of DROOP mode and how droop machine's actual speed remains the same is very understandable, but for an '<b>infinite</b>' grid. What is your opinion on our situation where we are operating in island mode and the GT on droop mode is exactly same as the GT in Isoch...

Hi CSA, This is an extremely insightful post and I thank you for that. I personally suspect that when GT-2 did not take full load (When GCV opened to 41% and P2 dropped by 1 bar), GT-2 speed decreased and consequently frequency of the system decreased. This caused GT-1 to take up the load in...

Dear All, Thanks for your detailed inputs. We have gone through a detailed discussion with GE and seem to have concluded the issue. However, if some of you can still point out something fishy, I am open to it. As per GE, our normal understanding of Iso and Droop behavior during load pickup...

Dear CSA, Thanks for detailed insight. We create load margins at site by keeping droop load constant, and then periodically switching off non-critical motors in field, thereby reducing load on ISO machine. We do not have any PMS or 'Load Control' at our site, and we do this load shedding...

Dear MikeVI, How can I confirm whether GT-2 was on Isoch mode or not? Is there any signal which I can see?

Couldn't find any of these signals. Maybe their name is changed in my system. If you give me some description of these signals I'll be able to locate those. >Isoch is de-selected by L90LL as soon as difference between >load set point and actual differs by more than 0.5MW - >default setting...

Thanks everyone for the detailed inputs. After many trials and tribulations, I've been able to map out the exact sequence of events which may help you all further. Time stamps shown are our local time but only minutes and seconds should be the matter of concern! So here it goes: 15.28.51...

Hi CSA, I really value your inputs and was hoping for your reply. I have posted the links for both dcast and csv files in another reply. Event happened on 3rd September and you can see it in following file: g1_triploglivedata_20190903_100000 g2_triploglivedata_20190903_100000

Below is the link for both dcast and csv files. Event happened on 3rd September and you can see it in following file: g1_triploglivedata_20190903_100000 g2_triploglivedata_20190903_100000 https://drive.google.com/drive/folders/1EvjMkmV6W5gKCjt8YSNCFXbeGHSscpc3?usp=sharing...

Hi MikeVI, >Before the event your plant load was around 55 megawatts. >It is assumed GT's #1 and #2 are the only machines that >could have responded to a loss in load since the Tornado was >coming offline and the Steam Turbine can't contribute much >if it is operating in some sort of...

Dear Moses, Thanks for the reply. > If GT_1 droop setting was 1% instead of typically 4% it >could cause it to take load faster. See my comment for >3)&4) Where I can find this exact setting in Mark VI? Can you tell me the name of the signal that is supposed to let us know that droop...