Re: The Smart Grid and Cybersecurity

[David Farber <dave () farber net>]

Begin forwarded message:

From: "Stan Hanks" <stan () colventures com>
Date: April 13, 2009 8:26:30 PM EDT
To: <dave () farber net>
Subject: RE: [IP] Re:    The Smart Grid and Cybersecurity

Just now getting around to my IP list mail today...

When we built the Enron network, installing fiber on power lines  
(google "optical ground wire") was fractional relative to the cost of  
digging the ground in putting in conduit. If I recall correctly, we  
spent something like $120k a mile to dig, and more like $25k per mile  
to install aerial optical ground wire. We only did this in a few  
spans, preferring to dig, but who wants to dig the Blue Mountains or  
the Sierras?

For most of those miles, it was replacement ground wire as well, that  
is, ripping out perfectly good ground wire and replacing it with  
ground wire plus fiber. If we'd had the ability to do it "from  
scratch" in a fresh build, the savings would have been significantly  
greater.

Stan


________________________________

From: David Farber [mailto:dave () farber net]
Sent: Mon 4/13/2009 6:46 AM
To: ip
Subject: [IP] Re: The Smart Grid and Cybersecurity





Begin forwarded message:

From: Bjørn <bv () norbionics com>
Date: April 12, 2009 8:14:11 PM EDT
To: dave () farber net
Subject: Re: [IP] Re:    The Smart Grid and Cybersecurity

On Sun, 12 Apr 2009 16:52:36 +0200, David Farber <dave () farber net>
wrote:

> Begin forwarded message:
>
> From: Peter Swire <peter () peterswire net>
> Date: April 12, 2009 10:17:07 AM EDT
> To: "dave () farber net" <dave () farber net>
> Subject: RE: [IP] Re:   The Smart Grid and Cybersecurity
>
> Hi Dave:
>
> I took part of the weekend off, but here are some responses to
> Thomas Lord's thoughtful questions.  Format is his question then my
> response:
>
> 1. How are cost savings obtained by putting up high voltage power
> lines and fiber at the
> same time?   My naive understanding is that
> the power lines are generally strung between towers while fiber is
> usually buried.  Even if the same right of ways are used it seems
> like you are suggesting having two crews, in the same spot, at the
> same time, getting in one another's
> way.   I did find reference elsewhere to case
> in Germany where power and fiber were both buried and were buried in
> the same conduit - so I can see the cost savings there - but is that
> the plan here?

At least in Norway, fiber is spun around the high voltage line. I can
see a cost saving from installing power lines with the fibe already
integrated with the conductor instead of using crawling robots to spin
fiber around the conducor after it has been put in place.


--
Using Opera's revolutionary e-mail client: http://www.opera.com/mail/




-------------------------------------------
Archives: https://www.listbox.com/member/archive/247/=now
RSS Feed: https://www.listbox.com/member/archive/rss/247/
Powered by Listbox: http://www.listbox.com <http://www.listbox.com/>

<<attachment: winmail.dat>>

-------------------------------------------
Archives: https://www.listbox.com/member/archive/247/=now
RSS Feed: https://www.listbox.com/member/archive/rss/247/
Powered by Listbox: http://www.listbox.com