islanding 3

[powercam]

hi people..
i have two 110kv line bays at a loop station and this is in turn connected to a transformer that also feeds into our grid. the protection for the line bays is required to trip the transformer. i asked why the transformer needs to be tripped for a lin fault and the answer i got was islanding. duh...i am new to this, so can yourll help me out here. the transformer is fed from wind turbines. i suspect it will have something to do with the turbines.

thanks in advance

 

[DRWeig]

Powercam,

It's a little confusing without a diagram of your system, but I suspect that the utility doesn't want an energized transformer in an otherwise blacked-out area in the event of a general loop trip. This assumes your wind turbines are self-exciting. You'd potentially create an "island" of energized grid that the linemen might not be expecting...

Again, I'd have to look at a diagram to be sure -- but you could also call this fellow back and get him to explain his term....

Good luck1

Old Dave

 

[stevenal]

Islanding occurs when the grid is split up into two or more isolated sections, each containing generation and load.