I know this might be largely off topic, but I heard someone once discuss the "dangers" of extrememly long transmission lines when you began approaching the 1/4 wave length of the 60 hz frequency that would make the line essentially a 60 hz radio antenna.
I don't have the expertise to comment.
I should have been clearer in my question.
As magoo2 states, the 97% PF is aimed at the transmission lines. In the ERCOT Deregulated market, this responsibility has been dumped onto the distribution utilities. The cap banks I was referring to are on 12.5Kv and 24.9 Kv grounded wye distribution...
We are under the gun to conform with the new NERC power Factor requirements of 97%. This will involve the installation a many new cap banks.
My problem is that we use the Cannon Technologies AMR system and have blocking units in the neutral of each bank to prevent the signal from being shunted...
Is it possible that you already have a capacitor bank on this lightly loaded line and one fuse is blown on it? The theory about a rolled phase might explain the bad Kvars, but your Kw would be equally out of wack.
The Texas Public Utility Commision has recently approved a Smart Metering initiative that least two companies are trying to accommodate via BPL.
My knowledge of the technology is limited, but I understand it involves a significant number of coupling capacitors to get the high frequency signal...
Waross Quote:
"Some time past, it was pointed out to me on this forum that the voltage drop of a transformer under normal loading was determined by the regulation, not the impedance."
Do you happen to remember the thread this was discussed in?
If not, would anyone care to summarize a brief...
We have two PLC AMR systems, but neither are close to this frequency.
We can see the problem in the substation (although, strangely enough, there is no significant 3rd harmonic). The problem worsens the closer you get to the end of the line (some 5 miles away) at one particular phone company...
The new NERC requirements are calling for Utilities to maintain 97% power factors at the substation power bank with penalties for those who don't comply. Even if you don't pay a penalty now, you will very shortly as the utilities cannot afford to eat the penalties.
Would the rest of your coordination allow you to go to a "C" curve on the down stream device?
Equally sloppy (but I've used it when nothing else would work) is to go 1 & 3 on the downstream unit and 2 & 2 on the upstream.
My utility is trying to help the local phone company find the source of a 9th harmonic which is causing noise on their system. The area is almost exclusively rural load with two exceptions; a lot of pipelines in the area (cathodic protection) and one large pipeline pump (1200 Hp).
We've ruled...
Could contamination of the insulators be a problem? We have a serious buzzard problem where the roosting birds on the crossarm defecate all over the bells. We've mounted bird quards and have lessened the problem considerably.
