On zaterdag, aug 16, 2003, at 05:38 Europe/Amsterdam, Eric Germann
wrote:
And the nukes tripping off was probably more an artifact
of frequency instability on the grid than a problem with the nukes
themselves.
Maybe a stupid question...
But what if the huge distribution systems used DC and the
Once upon a time, Iljitsch van Beijnum [EMAIL PROTECTED] said:
Maybe a stupid question...
But what if the huge distribution systems used DC and the whole thing
was only converted to AC close to the users in small installations?
This would get rid of the frequency problems.
Basic physics.
But what if the huge distribution systems used DC
the UK - France interconnect is DC
http://www.nationalgrid.com/uk/activities/other/mn_interconnectors_france.html
though a relatively short distance it does provide isolation
brandon
On zaterdag, aug 16, 2003, at 10:48 Europe/Amsterdam, Chris Adams wrote:
But what if the huge distribution systems used DC and the whole thing
was only converted to AC close to the users in small installations?
This would get rid of the frequency problems.
Basic physics. To run DC at the power
My guess is when it shakes out, the failure will be traced to a rather
large
unit or interconnect tripping offline.
It will be traced back to a huge branch from a huge tree that fell and took
down a couple of transmission lines which then melted the road in a fairly
expensive neighborhood in
Let me add yet another $0.02 worth, weighing in on the side
defending the electric power industry. Let's take a very high
level economic point of view. Should oodles of money be spent
improving the power generation and transmission grid? Suppose
that the current system were judged likely to
Speaking on Deep Background, the Press Secretary whispered:
Maybe a stupid question...
But what if the huge distribution systems used DC and the whole thing
was only converted to AC close to the users in small installations?
This would get rid of the frequency problems.
True, and
In message [EMAIL PROTECTED], Scott A Crosby writes:
I don't know, but at least reading this IEEE Spectrum article:
http://www.ece.umr.edu/courses/f02/ee207/spectrum/Grid/ implies that
long distance transmission is full of strange and nonlinear effects
such as 'reactive power', voltage support,
AOL's modem banks, which relay data over phone lines in New York City
and Detroit and other affected regions, had gone down after local
electricity grids blinked off Thursday evening.
AOL spokesman Nicholas Graham. Most of the power at our modem banks rely
on local power supplies.
On Sat, 16 Aug 2003, Chris Adams wrote:
Basic physics. To run DC at the power levels required, the wire would
have to be over 100 feet in diameter IIRC. Look up the Edison vs. Tesla
power arguments for all kinds of information on AC vs. DC.
Edison and Tesla's arguments took place long
The bulk electric transmission system in the United States and Canada has
been restored and is operating reliably. Many of the generating units that
tripped off line during the outage have returned to service and additional
generating units are expected to return to service over the weekend.
Speaking on Deep Background, the Press Secretary whispered:
AC still makes sense for distribution, but HV DC transmission lines are
becoming the norm. Think about some very large SCRs and associated parts
to convert to AC for distribution.
For several reasons
You must size the
I just thought of a better analogy.
The goal of almost any aeronautical engineer is to build a plane
that has good positive stability; you let go the stick and it
reverts to stable, level flight.
The reality of the power system more resembles the V22 Osprey, or
the Shuttle 'flying' on final
ATT reported 97 out of 100 generators worked in their network. MCI had
one generator fail due to a burned out part. Two carrier hotels had
problems with backup generators.
For backup generators that is an excellent performance. The Department
of Energy study found typically fewer backup
As an Equinix-Newark customer I can say the periodic informational update
efforts were appreciated as well. Mission critical services never noticed
the blip in their facilities. -ren
At 03:43 PM 8/16/2003 -0400, Sean Donelan wrote:
ATT reported 97 out of 100 generators worked in their
http://www.hydro.mb.ca/our_facilities/ts_nelson.shtml
- Original Message -
From: Chris Adams [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Friday, August 15, 2003 10:48 PM
Subject: Re: East Coast outage?
Once upon a time, Iljitsch van Beijnum [EMAIL PROTECTED] said:
Maybe a
Thus spake Petri Helenius [EMAIL PROTECTED]
subsidize) local power generation via renewable energy sources (e.g.
solar, wind, hydro) it would go a long way towards solving this
problem.
Rubbish.
If in order to make it viable such energy needs to be subsidized then it
is
not
David Lesher wrote:
True, and it's done. There are two very large DC lines in use:
The Pacific Intertie, from Washington State down to Califunny
A line from the Great Frozen North down to Minnesota.
IIUC, after the ice storm's enormous damage Hydro Quebec replaced their
interconnects with
Chris Adams wrote:
Basic physics. To run DC at the power levels required, the wire would
have to be over 100 feet in diameter IIRC. Look up the Edison vs. Tesla
power arguments for all kinds of information on AC vs. DC.
This was under the assumption that the transmission line was at the same
On Saturday 16 August 2003 03:58 pm, Having folded space, the Third Stage
Guild Navigator said:
http://www.hydro.mb.ca/our_facilities/ts_nelson.shtml
- Original Message -
From: Chris Adams [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Friday, August 15, 2003 10:48 PM
Subject: Re:
Once upon a time, Chris Lewis [EMAIL PROTECTED] said:
Chris Adams wrote:
Basic physics. To run DC at the power levels required, the wire would
have to be over 100 feet in diameter IIRC. Look up the Edison vs. Tesla
power arguments for all kinds of information on AC vs. DC.
This was under
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