Iam asking about the homeload arrangement for two gas turbines connected to one step-up transformer, the type is GE frame 9 and the UATs are connected to 15 Kv and it is after the GCB . The question is what is the configuration of the homeload situation if one or both the units are tripped???

 

Is that simple or combined cycle configuration

In case of one unit tripped well it really depend on site configuration

 

This should be part of the electrical /power systems studies analysises

 

The unit which tripped by 52L (Line circuit breaker ) or by 52G (Generator circuit breaker)?

The tripped unit by 52L should feed Unit or sometimes Plant auxiliaries equipments

 

Is that simple or combined cycle configuration

In case of one unit tripped well it really depend on site configuration

the units are both gas turbines.

 

The unit which tripped by 52L (Line circuit breaker ) or by 52G (Generator circuit breaker)?

The tripped unit by 52L should feed Unit or sometimes Plant auxiliaries equipments

if the unit is tripped by 52L, then the UATs of the units are both de-energized, so how the units are going to homeload

 

if the unit is tripped by 52L, then the UATs of the units are both de-energized, so how the units are going to homeload

suppose the the step-up transformer is disconnected from the H.V side

 

@Ali A. Ismail
I believe ControlsGuy25 is asking for a Single-Line-Diagram (SLD) of system you want help with!
Regards, Phil Corso

 

if the unit is tripped by 52L, then the UATs of the units are both de-energized, so how the units are going to homeload

Best thing is to provide SLD so we can support

 

SLD of the GTGs

 

Hello

Thank you for sharing SLD

When one GT IS TRIPPED then 52L TRIPPED/OPENED you should have GT 1 OR 2 OR both supplying UATs ...as you said that Step up Transformer is isolated from grid

But when GTs one or two tripped then 52G should get tripped to depending on the trip cause...

There is 2 differents 6.6KV that should be fed by GT 1 or 2 ..

House load should be ok on this configuration ..

I see that there is black start option ...

I will study in more details that thread and come back with notes

if the unit is tripped by 52L, then the UATs of the units are both de-energized, so how the units are going to homeload