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Article #16160Re: DC to AC on large scale???
From: Scott Dorsey
Date: Thu, 21 Jan 1993 18:52
Date: Thu, 21 Jan 1993 18:52
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In article <1993Jan21.095254.62979@cc.usu.edu> slmdj@cc.usu.edu writes: >He is an assistant city engineer for Adelanto, CA, and told me that the way >their power is distributed to a large substation is Direct Current! He said >that the DC is then 'phased' or 'converted' so that there is a three-phase AC >line to the city distribution grid. Neither of us have any idea how this could >be accomplished at such power levels (an entire valley, I think!) They do it with silicon, believe it or not! They have thyristor switches taller than a man, and switch the DC. This way, they can run DC on the long lines at high voltage, which is advantageous since they get more power over the same wire (since the limiting factor on the lines is the peak voltage before arc-over, and the peak voltage on DC is also equal to the average). --scott
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Path: arc1-ca.pugleaf.net!sparky!uunet!news.larc.nasa.gov!grissom.larc.nasa.gov!kludge From: kludge@grissom.larc.nasa.gov (Scott Dorsey) Newsgroups: sci.electronics Subject: Re: DC to AC on large scale??? Date: 21 Jan 1993 18:52:52 GMT Organization: NASA Langley Research Center and Reptile Farm Lines: 14 Message-ID: <1jmre4INNfks@rave.larc.nasa.gov> References: <1993Jan21.095254.62979@cc.usu.edu> NNTP-Posting-Host: grissom.larc.nasa.gov