3 ms·

It's interesting that fixing this delay will involve setting the grid's frequency above 50 to 50.01 Hz which will advance clocks about 15 seconds a day and thus

by pingec 9y ago

It's interesting that fixing this delay will involve setting the grid's frequency above 50 to 50.01 Hz which will advance clocks about 15 seconds a day and thus it will take 3 to 4 weeks to bring the clocks back on time. And they cannot set it higher than 50.01 because at that point mechanisms for bringing the frequency down to 50 would automatically kick in.

Cthulhu_ 9y ago
Would it "fix" it though? I mean I've already heard a lot of people that just reset the time on their clocks, so in 4 weeks they have to dial them back again. Maybe for unattended time keeping things?
- Piskvorrr 9y ago
  Most of the clocks do not have a human nearby to push the reset button (if there is one), as they're industrial automation. Alarm clocks and microwave ovens are mostly a side effect here; and yes, if you have adjusted the time manually, you'll need to do that again.
  - tzs 9y ago
    I wonder how those industrial automation clocks deal with power outages. Europe has quite reliable power, but even the best electricity providers have occasional unplanned outages. As of a few years ago the best was Germany, where the average customer had about 15 minutes per year without power due to unplanned outages (excluding outages caused by exceptional events). (For comparison, the best quartile of utilities in the US averaged about 90 minutes/year for their average customer).
mhandley 9y ago
Where does that 50.01 number come from? For the last 25 minutes, the UK grid figures have been: 50.217999 50.049999 49.990002 50.016998 50.106998 50.091999 They seem to go well above 50.01 for significant periods. Data from http://www.gridwatch.templar.co.uk/ http://www.gridwatch.templar.co.uk/
- ajnin 9y ago
  The UK is not part of the Continental European Power System. For the Continental European grid, the article links to https://www.swissgrid.ch/swissgrid/en/home/experts/topics/frequency.html https://www.swissgrid.ch/swissgrid/en/home/experts/topics/fr... which states that in the case of a time drift of more than 20 seconds the frequency will be shifted to 49.990 or 50.010 to correct it.

by pingec 9y ago

Cthulhu_ 9y ago

Would it "fix" it though? I mean I've already heard a lot of people that just reset the time on their clocks, so in 4 weeks they have to dial them back again. Maybe for unattended time keeping things?

Piskvorrr 9y ago
Most of the clocks do not have a human nearby to push the reset button (if there is one), as they're industrial automation. Alarm clocks and microwave ovens are mostly a side effect here; and yes, if you have adjusted the time manually, you'll need to do that again.
- tzs 9y ago
  I wonder how those industrial automation clocks deal with power outages. Europe has quite reliable power, but even the best electricity providers have occasional unplanned outages. As of a few years ago the best was Germany, where the average customer had about 15 minutes per year without power due to unplanned outages (excluding outages caused by exceptional events). (For comparison, the best quartile of utilities in the US averaged about 90 minutes/year for their average customer).

mhandley 9y ago

Where does that 50.01 number come from? For the last 25 minutes, the UK grid figures have been: 50.217999 50.049999 49.990002 50.016998 50.106998 50.091999 They seem to go well above 50.01 for significant periods. Data from http://www.gridwatch.templar.co.uk/ http://www.gridwatch.templar.co.uk/

ajnin 9y ago
The UK is not part of the Continental European Power System. For the Continental European grid, the article links to https://www.swissgrid.ch/swissgrid/en/home/experts/topics/frequency.html https://www.swissgrid.ch/swissgrid/en/home/experts/topics/fr... which states that in the case of a time drift of more than 20 seconds the frequency will be shifted to 49.990 or 50.010 to correct it.