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All, I've been discussing with a colleague, and I think we're all kind of missing something. The original post says the "...sever high surge event..." occurred one year ago. So, when did this high vibration start? Then, or very recently? It's not clear from the original post. It's not very...

sherif elzoghby, How old are the units? Do they have DLN combustors or conventional combustors? Is there a hazardous gas detection system in the turbine ventilation duct? Was it working? Was it in alarm prior to the attempted change-over? You say you were changing the ventilation...

What does the generator manufacturer say about the possible cause(s) of the problem and what to do to investigate or resolve the problem? We don't really know the severity or extent of the surge, nor do we know how the generator rotor is excited--all of which could have a very important...

Sriram, >We have no idea from the information >provided how your plant is configured. >And we would need to be able to look at >the Mark VIe to be a me to comment for >certain. Should have read: We have no idea from the information provided how your plant is configured. And we...

I'm really not clear on the problem. The common description of droop as "sharing the load" can be very confusing if sharing is not properly defined. The definition of sharing when discussing droop means that if the frequency drops the droop machine will "share" (take; accept; produce) some...

We have no idea from the information provided how your plant is configured. And we would need to be able to look at the Mark VIe to be a me to comment for certain. If your plant control system (DCS or BOP) is capable of controlling the reactive power flow across the tie breaker to the grid...

maatallah, Without being able to see the configuration values (parameters) in the Mark VIe, and without knowing if the bearings have redundant vibration sensors, it's not possible to say for sure exactly why the turbine tripped. The Vibration algorithm (block) used in most Speedtronic...

Charles and indurai, Yes; the EEPROM chip on the DCC/SDCC card (usually identified as being in the U9 chip socket, I believe) does occasionally go bad. They are a fairly generic EEPROM, though I don't have the manufacturer's name or part number. The EEPROM chip does not have a white...

sdbarman, If you connect a 1K resistor to the TSVx card for <T>'s output and you STILL have the open circuit Diagnostic Alarm, then the problem may be the TSVx card. I believe you have said you have tried replacing the cable between the TSVx card and the VSVO card in <T> (if not, that...

I don't quite understand the intent of the post... There is a Frame 6(B) Users Group. Just use your preferred Internet search engine. If you are trying to ask a question about a problem, try asking it here. If you're trying to promote (sell) something, well, there are lots of ways to do...

sdbarman, Yes; it's entirely possible that a single slot in a processor rack can have been damaged and cause the problem you are experiencing. The reason I suggested connecting a 1K ohm resistor directly to the TSVx card for <T>'s output was to ensure the wiring was NOT the source of the...

JamUp, I can sympathize with your frustration. The aviation industry demands--and gets--much better documentation about engines and auxiliaries. Aero-derivative engines packaged for land-based applications, which similar to those used for aviation purposes, don't get the same level of...

GSH, These Diagnostic Alarms can be caused by: 1) operator interface requests for data points that do not exist 2) "malformed" data requests 3) excessive data requests If there are misspelled or incorrect CDB (Control Signal Database) names (pointnames which don't exist) being...

Awaneesh, If Machine 2's Isochronous Speed Reference is 100.1354 the frequency when running is 50.0677 Hz, +/-0.17 Hz, which is most likely the reason Machine 1 is unloading. The signal names for frequency are SFL1 and SFL2. Even small differences like this can cause the problem being...

Awaneesh, I mis-spoke in my earlier post. In Isoch mode, the Speedtronic tries to make TNH equal to TNRI. And it is usually very successful at doing so. If TNH differs from TNRI by more than approximately (typically) 0.17% then fuel will be adjusted as necessary to make TNH equal to TNRI. In...

Huzairi, Self-challenge is always good. To answer the question in your 'Situation' it would be necessary to know how much power the generator is capable of producing. Let me give you an example. You are pedaling a bicycle on a long flat road and you are carrying some packages. You have...

mazen shanabeash, 1 MW = 1000 KW I don't believe the units are changeable, so you just multiply the MW value by 1000 and put the result in the DSLC field for KW.

Awaneesh, What is the frequency when Machine 2 is controlling frequency in Isoch mode and you bring Machine 1 on and switch Machine 2 to Droop Mode and Machine 1 to Isoch mode? What is the Isochronous Turbine Speed Reference of both units--Machine 1 and Machine 2? (The typical Speedtronic...

sherif elzoghby, The answer to your question lies in your description of "grid frequency turbulence." Yes; the frequency probably dipped as low as 48 Hz (which is 96% of rated speed and frequency), and it was also probably not very stable as it was doing so. It was most likely...

Awaneesh, The definition of Isochronous Speed Control Mode is frequency control. If, when you switch a governor to Isochronous Speed Control Mode it reduces its power output to zero, or less than zero, then that means, by definition, that the frequency of the system/load with which it is...