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From: lincoln@eosp1.UUCP (Dick Lincoln)
Newsgroups: net.misc
Subject: Re: The power grid
Message-ID: <810@eosp1.UUCP>
Date: Mon, 23-Apr-84 11:59:32 EST
Article-I.D.: eosp1.810
Posted: Mon Apr 23 11:59:32 1984
Date-Received: Tue, 24-Apr-84 01:06:48 EST
References: <304@vortex.UUCP>
Organization: Exxon Office Systems, Princeton, NJ
Lines: 11

> I don't know how it's set up in Canada, but here in the U.S. I
> believe that the entire grid is synchronized in terms of line
> frequency.  There was a region of Texas that refused to join in as
> late as a few years ago, but I think that even they may have sych'd
> with the rest of the grid by now.

If you hook into a power grid, you must be *phase*, not just frequency,
synchronized.  Dropping a second alternator of equal voltage, frequency
and power output across an alternator, *but exactly 180 dgs out of
phase*, is exactly twice as bad as dropping a dead short!  (This assumes
idealized, zero source impedance alternators.)