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#146191 - 11/05/06 04:32 AM Near-breakdown of European grid
Texas_Ranger Offline
Member
Registered: 12/17/01
Posts: 2391
Loc: Vienna, Austria
Yesterday after maintenance shutdown of a 400kV transmission line in Nordrhein-Westfalen, Germany, led to an emergency shutdown of private customers in many areas of Europe to prevent a full blackout. Several areas of Germany, France, Belgium and Italy were without power for 30 minutes, others experienced brownouts, areas in Austria lost power for 13 minutes.

In Vienna we had a severe brownout, followed by a noticeable overvoltage (very bright incandescent lights) and after some 15 minutes a dip back to normal again (which most people probably wouldn't have noticed at all, it just felt like the dim on startup surges you're used to here in Vienna).
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#146192 - 11/05/06 05:07 AM Re: Near-breakdown of European grid
pauluk Offline
Member
Registered: 08/11/01
Posts: 7520
Loc: Norfolk, England
Are there any official explanations yet as to what happened? It sounds as though somebody might have just shut down the line without checking if there was adequate capacity on other routes first.
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#146193 - 11/05/06 08:39 AM Re: Near-breakdown of European grid
Texas_Ranger Offline
Member
Registered: 12/17/01
Posts: 2391
Loc: Vienna, Austria
No official explanations. "Actually we don't know how it could happen!" said the spokeswoman of the German power company.
The papers aid it might take days or even weeks to determine the real cause of the overload.
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#146194 - 11/05/06 10:47 AM Re: Near-breakdown of European grid
RODALCO Offline
Member
Registered: 12/08/05
Posts: 854
Loc: Titirangi, Akld, New Zealand
It's interesting that these companies always employ spokeswoman ?

Sounds like a typically overloaded grid and not checking the loading prior to switching off that 400 kV line.

It's amazing what a bit of underfrequency can do and trip many bulk OCB's and turn countries in the dark.
_________________________
The product of rotation, excitation and flux produces electricty.
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#146195 - 11/05/06 02:12 PM Re: Near-breakdown of European grid
Texas_Ranger Offline
Member
Registered: 12/17/01
Posts: 2391
Loc: Vienna, Austria
Quote:
Sounds like a typically overloaded grid and not checking the loading prior to switching off that 400 kV line.

Most likely.

According to several people, including a former teacher of mine Austria is in for a much bigger potential catastrophy though...
Most of our generating capacity is concentrated in the eastern and northern region (hydro, caloric, lots of wind turbines), whereas the south doesn't have much generation capacity but heavy demand.
Those two areas are linked by two constantly overloaded 220kV lines.
Since they're that heavily loaded it's impossible to shut them down for maintenance. But live maintenance like painting pylons is illegal in Austria, so the pylons can't be painted...
So IF one of those lines fails, it'll most likely shut down at least half of Austria, probably taking down large areas of Europe.
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#146196 - 11/05/06 03:32 PM Re: Near-breakdown of European grid
RODALCO Offline
Member
Registered: 12/08/05
Posts: 854
Loc: Titirangi, Akld, New Zealand
They always try to find an excuse instead of admitting a switching error.

Texas_Ranger Please post any link to a newspaper report when it is issued.

thanks

Ray
_________________________
The product of rotation, excitation and flux produces electricty.
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#146197 - 11/05/06 03:52 PM Re: Near-breakdown of European grid
Alan Belson Offline
Member
Registered: 03/23/05
Posts: 1803
Loc: Mayenne N. France
Nothing happened here except the lights flickered once or twice. But then again there's a huge nuke station within 50 miles of me up in Brittany and we are pumping jus all the way down to Italy.

Alan

Trust me to open my big mouth! Just finished writing this and the lights went dim!!
_________________________
Wood work but can't!
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#146198 - 11/05/06 05:16 PM Re: Near-breakdown of European grid
djk Offline
Member
Registered: 12/26/02
Posts: 1237
Loc: Ireland
Seems that systems everywhere are being pushed to their limits.

We'll have to start rolling out some new lines!
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#146199 - 11/05/06 06:05 PM Re: Near-breakdown of European grid
RODALCO Offline
Member
Registered: 12/08/05
Posts: 854
Loc: Titirangi, Akld, New Zealand
Alan, it did upset part of your text.
somehow you got letters in the left hand side column, unless it was a temporary glitch.

Possibly due to excessive powerlosses in the grid on heavily overloaded and sagging HT pylons

OOPs it affected my post too.

edited for error

[This message has been edited by RODALCO (edited 11-05-2006).]
_________________________
The product of rotation, excitation and flux produces electricty.
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#146200 - 11/06/06 06:39 AM Re: Near-breakdown of European grid
Texas_Ranger Offline
Member
Registered: 12/17/01
Posts: 2391
Loc: Vienna, Austria
There are only German articles as far as I've seen. http://www.tagesschau.de/aktuell/meldungen/0,,OID6066150_REF1,00.html
According to this one they shut off the 400kV line across a river to let a huge ship pass...

All the other articles were only quoted here: http://forum.electronicwerkstatt.de/phpBB/viewtopic.php?topic=62832&forum=49
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