Negative X/R Ratio: Aspen Model
Negative X/R Ratio: Aspen Model
(OP)
Good morning,
I was surprised to find my model showing a negative X/R ratio this morning when using Aspen to model some faults.
Any thoughts on this? I am a bit confused as to how it occurred...
Thanks
Caleb
I was surprised to find my model showing a negative X/R ratio this morning when using Aspen to model some faults.
Any thoughts on this? I am a bit confused as to how it occurred...
Thanks
Caleb






RE: Negative X/R Ratio: Aspen Model
Gunnar Englund
www.gke.org
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Half full - Half empty? I don't mind. It's what in it that counts.
RE: Negative X/R Ratio: Aspen Model
RE: Negative X/R Ratio: Aspen Model
I didnt add any new three winding transformers, though I did add two new two winding transformers. And when I take the new portion of the circuit I added out of service, the X/R returns to a positive value...
Could small enough X values added in parallel create a negative X/R? Meaning, Or maybe the phase angle is causing this, since this is a complex value of the impedance as seen by the fault?