Hi All..

I was searching for information on electricity distribution systems 
in South Australia & was quite surprised at the number of high 
voltage direct current transmission lines either installed or being
installed around the world.

Some examples I found are Lake Erie Link, Harbor Cable (New Jersey 
to New York), Direct Link (NSW - Queensland) & Murray Link - 200 
MVA HVDC "light transmission system" (NSW to South Aust). From what 
I've seen of Murray Link on the news, it looks little more than 2" 
diameter, direct buried in a trench. 

My understanding was that DC had lost out to AC a century ago (Thomas
Edison) for power distribution due to resistance losses & inefficiencies.

Does anyone know of any compelling reasons for adopting DC for high
voltage transmission? 

Cheers, Steve..

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