I thought I²R heating was greater for DC. I am not an EE so this is not a rhetorical comment.
On Wed, Jun 25, 2014 at 3:11 PM, Robert Bruninga via EV <[email protected]> wrote: > > [the main] reason we have AC transmission > > is due the difficulties sending DC over long distances. > > But for very long distances, high voltage DC now wins. At very long > distances AC transmission is inefficient due to capacitance (and much > shorter when underground or underwater). AC also has additional Peak vs > RMS > IsquareR losses. > > On the other hand, DC loads the line capacitance once, and then it is no > longer a problem and it can operate at the peak voltage rating of the line, > not the average. Hence less overall loss for DC for the same conductor. > > But DC conversion does cost more. Hence the tradeoff. DC is now needed > for > very long point-to-point transmission which is what we now need to get > inter-regional transmission of power from Wind. (Solar is not involved > because it can be generated anywhere at the load for less cost than trying > to bring it in 2000 miles from Arizona). > > Bob > > On Wed, Jun 25, 2014 at 12:02 PM, Robert Bruninga via EV < > [email protected]> > wrote: > > Somebody has to pay for road repairs. > > Pipelines are a different issue. > > Rather than spending $billons of dollars on a pipeline monument to the > past, it is better to make that same investment into electrical > transmission lines for now and the future instead. > > The only thing holding back a near infinite supply of FREE renewable > energy is the lack of the long haul transmission lines to get the solar > and wind energy from where it is abundant (the plains) to where it is > needed. Pipelines do the same thing for oil but are an ultimate dead-end. > > Anyone want to invest in finding a way to send copper conductors through > old pipelines to convert obsolete pipelines to underground DC transmission > lines? > > Bob, Wb4aPR > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > For EV drag racing discussion, please use NEDRA > (http://groups.yahoo.com/group/NEDRA) > > > > > -- > Put this question to yourself: should I use everyone else to attain > happiness, or should I help others gain happiness? > Dalai Lama > > Tell me what it is you plan to do > With your one wild and precious life? > Mary Oliver, "The summer day." > > To invent, you need a good imagination and a pile of junk. > Thomas A. Edison > > A public-opinion poll is no substitute for thought. > Warren Buffet > > Michael E. Ross > (919) 550-2430 Land > (919) 576-0824 Google Phone > (919) 631-1451 Cell > (919) 513-0418 Desk > [email protected] > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > For EV drag racing discussion, please use NEDRA ( > http://groups.yahoo.com/group/NEDRA) > > -- Put this question to yourself: should I use everyone else to attain happiness, or should I help others gain happiness? *Dalai Lama * Tell me what it is you plan to do With your one wild and precious life? Mary Oliver, "The summer day." To invent, you need a good imagination and a pile of junk. Thomas A. Edison <http://www.brainyquote.com/quotes/quotes/t/thomasaed125362.html> A public-opinion poll is no substitute for thought. *Warren Buffet* Michael E. Ross (919) 550-2430 Land (919) 576-0824 <https://www.google.com/voice/b/0?pli=1#phones> Google Phone (919) 631-1451 Cell (919) 513-0418 Desk [email protected] <[email protected]> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140625/cc50060b/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
