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Renewable Energy: Tomorrows Eclipse

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1 to 22 of 22

  1.  
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      CommentAuthorSteamyTea
    • CommentTimeMar 19th 2015
     
    A couple of years ago we were discussing the amount of PV on the grid and how it may affect generation:
    http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9077&page=1

    Well tomorrow is the day to find this out.
    I shall keep an eye on the Gridwatch site and see what happens, there is a data column for Oil and Other generation types that are little used. I hope that the Other column shows PV, but not sure it does.
    I suspect that gas will increase and it will all be well managed and nothing unexpected will happen.
    I also hope the skies are clear, then I may be able to get some pictures.
    • CommentAuthoratomicbisf
    • CommentTimeMar 19th 2015
     
    Isn't it the case that most of the PV is unmetered by the grid and so shows as a drop in demand rather than an increase in supply? Say you have PV on your house and you're feeding 1kW into the grid, the grid isn't going to 'know' this but perceives it as a drop in demand of 1kW, same as if you were consuming 1kW and then switched off all your devices and stopped using 1kW...

    Ed
    •  
      CommentAuthorSteamyTea
    • CommentTimeMar 19th 2015
     
    Basically yes I think.
    We currently have about 4 GWp of PV installed. But at 9 to 10 AM on a March morning that may be only generating a 1/4 of that. So 1 GW to think about. When that is spread over traditional generation it will just about vanish.
    I had a quick look at what sort of generation is needed at 10 AM on a Friday in March and it is 43 GW.
    Be interesting to see what it actually is.
    • CommentAuthorEd Davies
    • CommentTimeMar 19th 2015 edited
     
    If Germany lost all its PV in an unpredictable instant that might be a problem. An eclipse is predictable, far from instant and we're not in Germany so I don't think we have much to worry about. Apparently there's some minor interest in how the grid will react but only from a fine-tuning point of view rather than any serious concerns. It'll be cloudy anyway.

    Off to get my 'scope from my container (amongst other things) just in case it's not 100% cloud tomorrow.

    [Pity, can't find my solar filter. It's in a box which is labelled (“solar filter and comp sci textbooks” I think) but it's not obvious. Will just have to do with eyepiece projection with my binoculars if it's clear.]
    •  
      CommentAuthorSteamyTea
    • CommentTimeMar 19th 2015
     
    I shall use my welding mask again, again.
    • CommentAuthorEd Davies
    • CommentTimeMar 19th 2015
     
    Be careful; some welding masks are OK, others not. Unfortunately I can't remember the details but it's a matter of which cut out enough UV and/or IR. They might look OK as far as visible light is concerned but still be doing harm. I thought there were different types for gas and electric welding but this pretty authoritative source seems not bothered by that, just the grade:

    http://www.mreclipse.com/Totality2/TotalityCh11.html#Welder
    •  
      CommentAuthorSteamyTea
    • CommentTimeMar 19th 2015
     
    Well it is too late to get cataracts, got shiny new, non UV filtering lenses.
    Should be as clear as day to me :cool:
  8.  
    Its the shadows I like during an eclipse
    • CommentAuthorCWatters
    • CommentTimeMar 20th 2015
     
    I prefer the Beatles to the Shadows.
    •  
      CommentAuthorSteamyTea
    • CommentTimeMar 20th 2015
     
    Elkie Brooks surely
      Eclipse.jpg
  11.  
    Im talking about the shadows cast on the ground by trees etc
    •  
      CommentAuthorSteamyTea
    • CommentTimeMar 20th 2015 edited
     
    This is as good as it got here at 9:23
    And here it is as a video, pretty bad one mind.
    https://www.youtube.com/watch?v=hcQzeqX2_qU
      Eclipse Peak.jpg
    • CommentAuthorEd Davies
    • CommentTimeMar 20th 2015
     
    Managed a few pictures including some shadows: http://edavies.me.uk/2015/03/eclipse/
    • CommentAuthorcbatjesmond
    • CommentTimeMar 20th 2015 edited
     
    <blockquote><cite>Posted By: SteamyTea</cite>Well tomorrow is the day to find this out.</blockquote>

    My contribution from a cloudy Tyneside (an hour after the event it is of course pretty clear and sunny :-/)
    Light intensity and PV generation, with the day before for comparison : http://www.ccandc.org/cgi-bin/env?START=5am_20150319&END=7pm_20150320#lux
  15.  
    cool
    :cool:
      dsc01442-small.jpg
  16.  
    Good to see the grid coped easily with a spike for pumped storage and hydro
    • CommentAuthorEd Davies
    • CommentTimeMar 20th 2015 edited
     
    PV generation graph from Cambridgeshire: http://susan-stepney.blogspot.co.uk/2015/03/detecting-eclipse.html

    (PS, thanks Bot. Steamy: your YouTube link doesn't work, even when I edit out the edit bit.)
    •  
      CommentAuthorSteamyTea
    • CommentTimeMar 20th 2015
     
    Works for me Ed. Not idea why it does not for you.
    • CommentAuthorEd Davies
    • CommentTimeMar 20th 2015
     
    Because you're logged in, I suspect. It asks me to log in to my Google account.
    •  
      CommentAuthorSteamyTea
    • CommentTimeMar 20th 2015
     
    •  
      CommentAuthorSteamyTea
    • CommentTimeMar 20th 2015 edited
     
    Had a quick look at what our national grid was doing
    The 'All Year' is the mean demand on the last Friday of this week since 2012, including today.
    All looks pretty normal to me. I will have a look at the energy mix later, but work is going to get in the way.
      Demand.jpg
      Frequency.jpg
  22.  
    Taken by a women in Poland , eclipse sunlight passing through window blinds
      7dPJfer.jpg

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