power factor penalty
power factor penalty
(OP)
we have two power factor improvement plants of 300 kvar & six stage each. Transformers are of 2000 kva (two Nos each). available load is 1900kw. presently we are facing power factor penalty. we are bound to have power factor of 0.9 by supply company. is it because of tranformer coil inductance. as whole 1900 kw is not operative all time. please advise the solution






RE: power factor penalty
Life is what happens while we're making other plans.
Wally
RE: power factor penalty
RE: power factor penalty
Doing the same on both transformers will also decrease voltage to induction motors and reduce reactive power consumption. This is especially effective if you are running them with above rated voltage.
If that isnt possible, or if it doesn't help, then you need more capacitors.
Gunnar Englund
www.gke.org
RE: power factor penalty
Ahhh, found what I wanted. Knew I could count on Eng-tips. Marke, a common contributor here has some good info at - [link]http://www.lmphotonics.com/pwrfact.html[/link]
I can't explain it any better, thats for sure.
If you still have questions, someone else can chime in.
Life is what happens while we're making other plans.
Wally
RE: power factor penalty
I have met with multiple industrial customers on this issue to provide support to correct and the most commmon solution is power factor controlled multiple stage cap banks (or power factor improvement plants). Often thse are on the LV (480V) and have high voltage overrides to avoid over voltages during light load times. It sounds like you have the equipment and just need to have the proper switching incorporated. With two seperate banks, if I understand you correctly, you will need to be sure to utilize your delay times for switching as to avoid hunting of the two banks. Basically choose which bank will be first in and last switched out.
RE: power factor penalty
I think you may just need some more capacitors.
Bung
Life is non-linear...
RE: power factor penalty