BJC
Electrical
- Jan 29, 2001
- 2,119
I am reviewing a wind farm collection system.
The system is radial with up to 7 generators on one radial. The transformers are Y-D 600 volt delta -up to 34.5 kV. The tranformer terminals on the MV side are 600 amp feed thru, with dead break elbows.
The 34.5 side has a D-Y grounding transformer (X-0 grounded).
My question is: Is this normal?
I would have used single feed tranfromer with a combination 600 and 200 amp dead break elbow connectors. That way one generator/transformer doesn't take out all or most of a radial.
The only good way to detect a 34.5 kV system ground is at the collection substation. The low side breakers on each generator stup up transformer are shut tripped from the radial PCB.
I would recommend directional fault indicators on all radial collectors. Clearing a ground fault would be a long process without them.
Your thoughs and comments please.
Thank You
The system is radial with up to 7 generators on one radial. The transformers are Y-D 600 volt delta -up to 34.5 kV. The tranformer terminals on the MV side are 600 amp feed thru, with dead break elbows.
The 34.5 side has a D-Y grounding transformer (X-0 grounded).
My question is: Is this normal?
I would have used single feed tranfromer with a combination 600 and 200 amp dead break elbow connectors. That way one generator/transformer doesn't take out all or most of a radial.
The only good way to detect a 34.5 kV system ground is at the collection substation. The low side breakers on each generator stup up transformer are shut tripped from the radial PCB.
I would recommend directional fault indicators on all radial collectors. Clearing a ground fault would be a long process without them.
Your thoughs and comments please.
Thank You
