oops, yes, skin effect would be significant, too. On Sun, May 8, 2011 at 8:13 AM, Olin Lathrop wr= ote: > Sean Breheny wrote: >> The advantages of using DC for such long distances is >> reduced losses (due to capacitive coupling and EM radiation) and >> relieving the need to synchronize phase (which is difficult to do >> between two ends of a very long transmission line with a varying >> load). > > And no skin effect. =A0That means the conductors can be used more efficie= ntly. > > As you say, DC is usually reserved for long distance transmission. =A0The > power feed from Hydro Quebec is 100s of miles long, and is DC. =A0It ends= at a > special power conversion station in Ayer, not far from my house. > > > ******************************************************************** > Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products > (978) 742-9014. =A0Gold level PIC consultants since 2000. > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .