The IET is carrying out some important updates between 17-30 April and all of our websites will be view only. For more information, read this Announcement

Rules and Guidelines
Want to participate in the discussions? Please read our Community Rules and Guidelines. Need some help? Visit Support and Answers.

  • State Not Answered
  • Locked Locked
  • Replies 44 replies
  • Subscribers 31 subscribers
  • Views 3717 views
  • Users 0 members are here
Options
You may also be interested in
This discussion is locked.
You cannot post a reply to this discussion. If you have a question start a new discussion

The Western HVDC Link

Alan Capon
I did originally answer the previous thread, but have since deleted my response and I believe a new thread with a proper and correct title is the correct way of answering. 


More info on the fault here: https://www.energy-reporters.com/transmission/italys-prysmian-under-fire-over-uk-interconnector-failure/ 


Reports suggest an undersea cable fault in the vicinity of Liverpool Bay. 


Regards,


Alan.
Parents
  • 0
    I am not too sure about HVDC cables as they look fatter, and historically have normally been laid in diveable depths, but submarine telco cables are always made quite a bit longer than the direct path might suggest, because the sea floor is far from flat. You do not want delicate cables stretched across a rocky valley at any point. Indeed in the early days of cable laying in the late 1800s this caught out quite a few projects in the bigger oceans. The channel and the north sea is quite shallow around 50-100m deep in most places and gently undulating, with the odd sand bank and a few shipwrecks to avoid,  picture here  so the first cable layers had a false sense of security, moving on to the trans atlantic cables on the other hand turned out to be another game altogether.


    When fishing for cables at deeper than safe diving depths you may grapple and lift at several points and buoy to give support at intermediate depths, so only the middle of the lifted sections comes to the surface and is not too stressed.

    If all else fails, you may end up with two joints.

Reply
  • 0
    I am not too sure about HVDC cables as they look fatter, and historically have normally been laid in diveable depths, but submarine telco cables are always made quite a bit longer than the direct path might suggest, because the sea floor is far from flat. You do not want delicate cables stretched across a rocky valley at any point. Indeed in the early days of cable laying in the late 1800s this caught out quite a few projects in the bigger oceans. The channel and the north sea is quite shallow around 50-100m deep in most places and gently undulating, with the odd sand bank and a few shipwrecks to avoid,  picture here  so the first cable layers had a false sense of security, moving on to the trans atlantic cables on the other hand turned out to be another game altogether.


    When fishing for cables at deeper than safe diving depths you may grapple and lift at several points and buoy to give support at intermediate depths, so only the middle of the lifted sections comes to the surface and is not too stressed.

    If all else fails, you may end up with two joints.

Children
No Data

Join us to get the best from IET EngX.

Joining EngX lets you personalise your experience so you stay up to date on the topics that interest you, plus you’ll be able to make connections who are looking to collaborate, exchange ideas and more.

Join us Not now

Community Rules & Guidelines