50 MW gas turbines û conversion from 60 to 50 Hz
50 MW gas turbines û conversion from 60 to 50 Hz
(OP)
I’m starting to get involved in a rather very messy project – conversion of used GE LM6000 turbine-generator sets from 60 to 50 Hz. My role is more overseeing than doing the actual conversion, and it appears that there are many issues related to generator, excitation, protection, ITs or just about anything else, to be sorted out. If anyone has similar previous experience, would you please provide some general guidance (at the present I don’t have enough relevant info to ask more specific questions). Thank you.






RE: 50 MW gas turbines û conversion from 60 to 50 Hz
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Sometimes I only open my mouth to swap feet...
RE: 50 MW gas turbines û conversion from 60 to 50 Hz
RE: 50 MW gas turbines û conversion from 60 to 50 Hz
Your lube system will be running slower and possibly at lower pressure and should be reviewed.
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: 50 MW gas turbines û conversion from 60 to 50 Hz
Motors will be fine at 5/6th voltage if the loads can accept the lower speed.
respectfully
RE: 50 MW gas turbines û conversion from 60 to 50 Hz
How about CTs? Will the accuracy change much?
RE: 50 MW gas turbines û conversion from 60 to 50 Hz
If the gearbox addition or change means a change in generator direction of rotation, which is most often the case, then the generator rotor fans will have to be reversed, the exciter fan will have to be replaced, and the bearings will now have to be changed to operate opposite hand. Most of the other systems on the package are also designed with 50 HZ as the primary frequency, so you are going in a direction that brings them back to their starting point.
QED (if you have enough money)
rmw
RE: 50 MW gas turbines û conversion from 60 to 50 Hz
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Sometimes I only open my mouth to swap feet...
RE: 50 MW gas turbines û conversion from 60 to 50 Hz
RE: 50 MW gas turbines û conversion from 60 to 50 Hz
Brush generators? Lucky you.
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Sometimes I only open my mouth to swap feet...
RE: 50 MW gas turbines û conversion from 60 to 50 Hz
Back to waross’ comment that 60 Hz stuff will be more or less OK at 50 Hz if 5/6 V/Hz ratio is maintained is easy to comprehend for PTs, but for CTs it seems to be rather burden dependent?. Or I simply worry too much :)?