Talk:Lyon–Moutiers DC transmission scheme

References

I'll have to take this one out of the library again:

• R. M. Black The History of Electric Wires and Cables, Peter Pergrinus, London 1983 ISBN 0 86341 001 4

This talks about the Lyons scheme and has a picture of the cable.

Bill

Bill, this picture and the text actually is online. Regretably the photo is post 1922, or I would have uploaded it. Not much there, but it does corroborate the facts so I will cite it and add whatever details aren't already there. A wild system- 6 miles of underground HVDC in 1906, with all loads in series. Maybe I am imagining the lack of independent loads presented more problems than there actually were. I'd like to know more about that. If it was a hassle, I wonder how they coordinated adding and subtracting loads- do they telegraph the hydro station to tell them they are taking a 300 kW motor offline? -J JMesserly (talk) 00:28, 9 January 2009 (UTC)

Cool. I'm still looking for a definitive HVDC history but have not had much library time the last few months. From what I've read this was a series constant-current system, so I imagine if a load went off, the source machines would speed up and the governor would bring them back into regulation - compared to an AC system they had no need to keep constant generator speed. Reading about old tech is always humbling - I'm often wondering which of our shiny toys today will be considered laughably complicated and quaint in only a few years. Check out Apollo Guidance Computer and compare with the processors in appliances, etc. --Wtshymanski (talk) 14:51, 9 January 2009 (UTC)

Check out Alfred Still, Overhead Electric Power Transmission, McGraw Hill, 1913 page 145, available from the Internet Archive, for a description of the Thury system. There's also an article (with list of installations) in the November 1915 edition of the General Electric Journal but I haven't found this on-line; perhaps my local university library has access? --Wtshymanski (talk) 19:00, 22 January 2009 (UTC)

Interesting. Yes. Google books has "Electric Power Transmission", so you can search for whatever you want in it. I couldn't find General electric journal issue either. Re: computers- yeah. Oddly enough, I am second generation computer geek. my father got his start in computers on one of the first two Univac I's built. After his duty in Korea, he got a job at Boeing replacing tubes in that beast. The Sol computer and Imsai microcomputers I first worked on were roughly equivalent in processing power to the AGC, but the UI on the Imsai was far less friendly- we had to program the bootstrap loader from mylar tape in binary- using toggle switches. It is odd this form of programming, because it is tactile- like a load register A instruction has a certain pattern. If it is from another register one of your fingers flips the toggle up- and it is always that same toggle for source register whether it is loading A or B etc. You are unaware of these details when coding in hexadecimal or symbols. Anyway- all this stuff is a completely lost world to the programmers these days. I feel like I am a cooper sometime describing how to make a barrel to carpenters who are lost without their deWalt battery powered power tools. It's a lost world, but it was glorious while it lasted. I am fiddling with some time-space templates on Commons right now, but I will be back on WP soon to help out on the electricity articles.-J JMesserly (talk) 08:02, 23 January 2009 (UTC)

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