Generator synchronization problem
Generator synchronization problem
(OP)
How long i can synchronize two generators each 2MW without loads?
Is there is condition to connect generators in parallel without load or the synchronization will fail due to no-load operation.
Is there is condition to connect generators in parallel without load or the synchronization will fail due to no-load operation.






RE: Generator synchronization problem
Any reason you want to run the 2 generators without load ?
RE: Generator synchronization problem
and we still investigating up to now.
RE: Generator synchronization problem
You may have to set the reverse power relay a few percent higher.
Bill
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"Why not the best?"
Jimmy Carter
RE: Generator synchronization problem
Bill
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"Why not the best?"
Jimmy Carter
RE: Generator synchronization problem
moustafa
When you say "one of the generators fail by reverse power 10 seconds after synchro", do you mean the generator winding failed or simply the reverse power relay tripped ?
RE: Generator synchronization problem
and for Mr.waross
the synchro was on auto mode and the schenchro was already done but one generator trip after 10 seconds
and another clarification required the reverse power is will known for the generators but what do you mean by prior to starting a large motor.
You may have to set the reverse power relay a few percent higher.
RE: Generator synchronization problem
RE: Generator synchronization problem
RE: Generator synchronization problem
Here's a good ABB pdf link on their RPR's.
http
RE: Generator synchronization problem
RE: Generator synchronization problem
Also, at a small power plant, when going back online after an outage, if the anticipated load was more than one set could handle we would start and sync two sets prior to picking up the load.
If there is any variation of the governors at no load, you will have reverse power. If the load will be applied within a few minutes, it may be safe to bypass the reverse power protection until some load is added.
Reverse power damage usually takes some time to develop.
What type of prime movers do you have.
Bill
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"Why not the best?"
Jimmy Carter
RE: Generator synchronization problem
IMHO is not necessary to vary the protection settings calculated for normal operation.
Possibly in your case you are paralleling with governors in isoch mode. If is so, change to droop mode and set droop at 3 to 4% to avoid generators to be motorised each other.
RE: Generator synchronization problem
RE: Generator synchronization problem
RE: Generator synchronization problem
You need to make sure they will share together with no load before you try to load them in parallel.
RE: Generator synchronization problem
Keith Cress
kcress - http://www.flaminsystems.com
RE: Generator synchronization problem
RE: Generator synchronization problem
RE: Generator synchronization problem
Look at the watt meter, not the ammeter. Back off the governor until one generator shows zero watts. If the ammeter is showing a lot of current, adjust the voltage until the current drops. Then trip the breaker open.
Bill
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"Why not the best?"
Jimmy Carter
RE: Generator synchronization problem