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This appears to be a contingency plan 'in the "unlikely" event supplies of gas fall short of demand.' The report showed, under a base case scenario, that margi

by AngusH 4y ago

This appears to be a contingency plan 'in the "unlikely" event supplies of gas fall short of demand.' The report showed, under a base case scenario, that margins between peak demand and power supply were expected to be sufficient and similar to recent years thanks to secure North Sea gas supplies, imports via Norway and by ship. Any operator that didn't have such contingency plans would be negligent. Is it going to happen in reality: hopefully not Edit: I have a feeling that the article may be referring to the 3 hour Loss of Load Expectation (LOLE) service level target for the year. This isn't quite the same as a three hour blackout. I'm not sure though because the sky article doesn't reference its sources. Which may be this: https://www.nationalgrideso.com/document/264521/download https://www.nationalgrideso.com/document/264521/download or it might not? edit2: actually I think it's this: https://www.nationalgrideso.com/document/268346/download https://www.nationalgrideso.com/document/268346/download edit3: Found it, its not the LOLE target, but the response to scenario 2 on page 10 of the second link: scenario 1: "In this scenario we assume that we have no electricity interconnector imports from France, Belgium and the Netherlands (these are assumed to provide a de-rated capacity of 3.9GW in the Base Case). It is assumed that we import 1.2GW from Norway and export 0.4GW to Northern Ireland and Ireland." scenario 2: "In this scenario we assume the same assumptions as Scenario 1, but with an additional 10GW CCGTs unavailable for a two-week period in January1. These assumptions have been chosen to illustrate the potential impact on the electricity system if there was insufficient gas supply in Great Britain." "Should this scenario happen, it may be necessary to initiate the planned, controlled and temporary rota load shedding scheme under the Electricity Supply Emergency Code (ESEC). In the unlikely event we were in this situation, it would mean that some customers could be without power for pre-defined periods during a day – generally this is assumed to be for 3 hour blocks. This would be necessary to ensure the overall security and integrity of the electricity system across Great Britain. All possible mitigating strategies would be deployed to minimise the disruption." Which I think would then follow this set of rules: https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/995049/esec-guidance.pdf https://assets.publishing.service.gov.uk/government/uploads/... final: I think my information here is mostly right. But you should not base your electricity operational decisions on it!

sefrost 4y ago
Under Designated Services: > Sites with a continuous manufacturing process, not sustainable through BEIS standby generation, where regular shutdown for 3-hour periods is not possible and would cause significant financial damage I wonder if this includes Agile offices, it seems like a broad definition!
- tomxor 4y ago
  That is not a manufacturing process. Pretty sure they are referring to time sensitive operations where halting a manufacturing process causes substantial losses due to the overhead of starting and stopping that process and probably losses due to waste that cut much deeper than mere losses in profits... maybe also to do with the affect on supply consistency to their customers. (Regularly) shutting down such operations could quite realistically bankrupt them.
- AngusH 4y ago
  :-) Very broad indeed, though I think it's just qualification for asking, not grounds for acceptance, (thankfully) One thing I'm curious to know is what it's like on the distribution side though, getting these requests and then approving them (or not) I wonder if they only get serious requests (say steel mills and hospitals) or if they also get requests from non-essential businesses who shouldn't be on the list? Most data centers should have back up power, so the question of whether Facebook, Twitter and Amazon get cut off probably doesn't need to be asked.
  - bombcar 4y ago
    Datacenters often have agreements to shed load in emergencies - I was working on a machine inside a datacenter in San Diego when they announced that SDGE had asked them to throw to generator as the load was too high. This was back in the Enron days. If you've never been in a secure datacenter when they throw, it's fun.
    - dotancohen 4y ago
      > If you've never been in a secure datacenter when they throw, it's fun. I find your ideas intriguing and would like to subscribe to your newsletter. Seriously, though, do tell us more.

by AngusH 4y ago

sefrost 4y ago

Under Designated Services: > Sites with a continuous manufacturing process, not sustainable through BEIS standby generation, where regular shutdown for 3-hour periods is not possible and would cause significant financial damage I wonder if this includes Agile offices, it seems like a broad definition!

tomxor 4y ago
That is not a manufacturing process. Pretty sure they are referring to time sensitive operations where halting a manufacturing process causes substantial losses due to the overhead of starting and stopping that process and probably losses due to waste that cut much deeper than mere losses in profits... maybe also to do with the affect on supply consistency to their customers. (Regularly) shutting down such operations could quite realistically bankrupt them.
AngusH 4y ago
:-) Very broad indeed, though I think it's just qualification for asking, not grounds for acceptance, (thankfully) One thing I'm curious to know is what it's like on the distribution side though, getting these requests and then approving them (or not) I wonder if they only get serious requests (say steel mills and hospitals) or if they also get requests from non-essential businesses who shouldn't be on the list? Most data centers should have back up power, so the question of whether Facebook, Twitter and Amazon get cut off probably doesn't need to be asked.
- bombcar 4y ago
  Datacenters often have agreements to shed load in emergencies - I was working on a machine inside a datacenter in San Diego when they announced that SDGE had asked them to throw to generator as the load was too high. This was back in the Enron days. If you've never been in a secure datacenter when they throw, it's fun.
  - dotancohen 4y ago
    > If you've never been in a secure datacenter when they throw, it's fun. I find your ideas intriguing and would like to subscribe to your newsletter. Seriously, though, do tell us more.