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- Newsgroups: sci.physics
- Path: sparky!uunet!cis.ohio-state.edu!zaphod.mps.ohio-state.edu!wupost!gumby!destroyer!cs.ubc.ca!newsserver.sfu.ca!news
- From: palmer@sfu.ca (Leigh Palmer)
- Subject: Re: Electric Power Transmission (was: History of AC vs DC Power)
- Message-ID: <1992Nov19.202817.29139@sfu.ca>
- Sender: news@sfu.ca
- Organization: Simon Fraser University
- References: <1992Nov11.154425.8399@speedy.aero.org> <HAGERMAN.92Nov19122352@rx7.ece.cmu.edu>
- Date: Thu, 19 Nov 1992 20:28:17 GMT
- Lines: 29
-
- In article <HAGERMAN.92Nov19122352@rx7.ece.cmu.edu> hagerman@ece.cmu.edu (John
- Hagerman) writes:
-
- > In 1970 a 1,380-km (856-mi), 800-kV direct-current (DC) line
- > was placed in commercial service to connect northwestern U.S.
- > hydroelectric sources with the Los Angeles area. Such systems
- > ... avoid stability problems sometimes encountered by AC
- > systems; DC systems are sometimes used to connect AC systems
- > even over short transmission distances.
-
- Wow. Thanks for the information, John. I hope someone will be able to drop the
- other shoe and tell us where to learn more about this twenty-year-old
- technology. I'd like to know how the DC is produced at source and how it is
- handled at its destination. It would also be interesting to know something of
- the record over the last twenty-two years of this link, and whether there are
- now many more of them.
-
- I am under the impression that our EHV transmission lines here in British
- Columbia are all AC. They are of the four-wire spaced configuration which
- supresses corona. For that reason I mention them in my teaching, and I'd not
- like to think that I didn't know the mode of transmission.
-
- If you've never visited a hydroelectric power generation plant you've missed a
- treat. In our Peace River facility there are huge generators one can get up
- close and personal with, and even enter if they are open for maintenance. I saw
- the shaft end of a generator once on James Burke's "Connections", but I think
- that's the only other contact I've had with this impressive sight.
-
- Leigh
-