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Political: We're doomed, Captain Mannering...

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  • Re: Political: We're doomed, Captain Mannering...

    Originally posted by Naughty Nigel View Post

    As a point of interest, all interconnectors use rectified (DC) electricity and then use inverters to convert is back to AC once on dry land. This is because of the very high losses that long-distance AC interconnectors suffer.
    I thought it was because of synchronisation of the grids in each country being different.
    Graham

    We often repeat the mistakes we most enjoy...

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    • Re: Political: We're doomed, Captain Mannering...

      Could this 3m.30' video about an App, be the answer to creating employment, saving the planet and... to resolving the Brexit fiasco? https://www.bbc.co.uk/news/av/storie...out-of-rubbish

      The answer can be found @ 3 minutes into the video.
      It's not what inspires us that is important, it's where the journey takes us.

      Wally and his Collie with our Oly bits & bobs

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      • Re: Political: We're doomed, Captain Mannering...

        Originally posted by Graham_of_Rainham View Post
        I thought it was because of synchronisation of the grids in each country being different.
        Nooo. The undersea cables run at very high voltage (270 kV), with the earth being neutral. At these voltages the electrical capacitance of the cable would result in significant losses if AC power was used. In fact it is calculated that by the end of the cable the losses would actually be greater than the power you could put in!

        AC power would also require better insulation than for DC power as dielectric strength of the insulator is reduced under AC conditions, although DC switchgear is a lot more complicated

        Synchronisation of the different grids could be a potential problem as load occurs at different times across the continent but it doesn't seem to cause problems within Europe itself. In any case our grid frequency varies slightly throughout the day according to load but always averages 50 Hz from midnight to midnight. Interestingly, this is how 'smart chargers' know when to charge electric cars and so forth.

        Now if we had an AC connection to the USA that really would cause a problem.
        ---------------

        Naughty Nigel


        Difficult is worth doing

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        • Re: Political: We're doomed, Captain Mannering...

          You are right, of course, I worded that badly, in a failed attempt at a reference to the EU being out of sync with the UK...

          However, in a moment of reflection I recalled that the HVDC link now runs through the Channel Tunnel.

          https://www.google.com/search?q=elec...Q50AlP02yWQ3M:
          Graham

          We often repeat the mistakes we most enjoy...

          Comment


          • Re: Political: We're doomed, Captain Mannering...

            Yes, very high voltage DC means lower current so losses are much less.
            Regards
            Richard

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            • Re: Political: We're doomed, Captain Mannering...

              Originally posted by Graham_of_Rainham View Post
              You are right, of course, I worded that badly, in a failed attempt at a reference to the EU being out of sync with the UK...

              However, in a moment of reflection I recalled that the HVDC link now runs through the Channel Tunnel.


              I don't think we have ever been in synch with Europe have we?

              The French interconnector does run through the channel tunnel, but the Dutch and Irish interconnectors are subsea cables.



              Originally posted by Otto View Post
              Yes, very high voltage DC means lower current so losses are much less.
              Yes indeed, but the capacitance of a 73 KM long cable would be like a short circuit at 50 Hz!
              ---------------

              Naughty Nigel


              Difficult is worth doing

              Comment


              • Re: Political: We're doomed, Captain Mannering...

                Originally posted by Naughty Nigel View Post


                The French interconnector does run through the channel tunnel, but the Dutch and Irish interconnectors are subsea cables.
                Actually, reading into it further four of the eight subsea cables were damaged in 2016 by a ship dragging her anchor, so at least part of the interconnector runs across the sea bed.
                ---------------

                Naughty Nigel


                Difficult is worth doing

                Comment


                • Re: Political: We're doomed, Captain Mannering...

                  Reality TV 'really' hits the spot... https://www.bbc.co.uk/news/av/45841506/the-brexitcast-team-discuss-breaking-up-with-a-remoaner-sketch
                  It's not what inspires us that is important, it's where the journey takes us.

                  Wally and his Collie with our Oly bits & bobs

                  Comment


                  • Re: Political: We're doomed, Captain Mannering...

                    With storms lashing both sides of the Atlantic, which way will the wind blow?

                    Howdy, partner https://www.bbc.co.uk/news/world-us-canada-45725210
                    It's not what inspires us that is important, it's where the journey takes us.

                    Wally and his Collie with our Oly bits & bobs

                    Comment


                    • Re: Political: We're doomed, Captain Mannering...

                      Originally posted by Naughty Nigel View Post
                      I suppose we will have to see what tariffs Jean-Claude Juncker slaps on electricity imports and exports.
                      Is he the EU Parliament then?

                      Jim

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                      • Re: Political: We're doomed, Captain Mannering...

                        Originally posted by Wally View Post
                        With storms lashing both sides of the Atlantic, which way will the wind blow?
                        Yeah - just come back from 5 days camping in The Roaches (Staffs). Weather was horrible - roaring wind and lashing rain!

                        Jim

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                        • Re: Political: We're doomed, Captain Mannering...

                          Originally posted by Jim Ford View Post
                          Is he the EU Parliament then?

                          Jim
                          Well it seems like it. He calls the tunes.
                          ---------------

                          Naughty Nigel


                          Difficult is worth doing

                          Comment


                          • Re: Political: We're doomed, Captain Mannering...

                            Originally posted by Jim Ford View Post
                            Yeah - just come back from 5 days camping in The Roaches (Staffs). Weather was horrible - roaring wind and lashing rain!

                            Jim
                            Its October, were you surprised?

                            Comment


                            • Re: Political: We're doomed, Captain Mannering...

                              Originally posted by Naughty Nigel View Post
                              Well it seems like it. He calls the tunes.
                              What like Theresa May is the U.K. Parliament?

                              Jim

                              Comment


                              • Re: Political: We're doomed, Captain Mannering...

                                Ignore that it is in the Guardian, it matters not which way you voted, there are some hard reality issues that simply cannot be ignored.

                                https://www.theguardian.com/commenti...P=share_btn_fb
                                Graham

                                We often repeat the mistakes we most enjoy...

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