From: noone@nospam.com   
      
   Στις 11/3/2020 1:46 μ.μ., ο J.B. Wood έγραψε:   
   > On 3/10/20 10:42 AM, DecadentLinuxUserNumeroUno@decadence.org wrote:   
   >   
   >>    It is done by knowing how many busuness and industrial zoned areas   
   >> are nearby and what their consumption is comprised of.   
   >>   
   >>    A place with a lot of boiling water heaters is a resistive load (as   
   >> I am sure you know), but a place full of high HP electric motors and   
   >> other inductive loads 'raises eybrows'.  So I am guessing here when I   
   >> say that I feel reasonbly sure that they map it out by usage,   
   >> constantly updated, and mount banks on poles as needed and sized as   
   >> needed too.  So small banks in some places on the fringes of an   
   >> industrial area and huge banks within.   
   >>   
   >>    But I could be wrong, of course.  They could simply mount huge   
   >> banks at certain points and rest assured they have a lead on the   
   >> current waveform.  Guess number two.   
   >>   
   >>    Don't worry though, we'll al probably die before we find out.   
   >>   
   >   
   > Hello, and thanks for replying.  Those are certainly reasonable guesses.   
   >   Textbooks are great on theory but often come up short on application.   
   > My take on this would be since the electric utility would know the   
   > distribution main and branch MV line interconnections from a substation   
   > and the reactive volt-amperes at the load (industrial plant), they could   
   > just go back up from the aggregated loads to some convenient point on   
   > the distribution line, and knowing the transmission line characteristics   
   > (resistive loss per mile, etc) the amount of parallel capacitance   
   > required can be determined.  Sincerely,   
   as I am sure you know, measuring the PF on MV lines would need to   
   interrupt the circuit and mount potential and current transformers to   
   feed the measuring equipment. On my visit here in a HV/MV substation   
   (150/20 kV now) they had mounted LOTS of capacitors on the low side to   
   compensate for the excess usage of air conditioning in the summer. I   
   think that, unfortunately, the large usage of AC during the summer   
   contributes A LOT to climate change, because of very high reactive power   
   demand and the thermal load of the external units that emit heat to the   
   environment. I personally use normal fans for cooling.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)