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The Western HVDC Link

Alan Capon over 5 years ago

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.

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0 Alan Capon over 5 years ago

The problem here is we won’t know the answer until the fault has been located, brought to the surface and examined. The voltage is new - I think it is the first cable running at 600kV dc. The fault could be a manufacturing fault, a loading / installation fault, or something that has been caused by ground conditions, or it could be damage from excess current caused by the previous fault. Until the fault is located and examined, we won’t know. A “footprint” will have been taken of the cable after installation. A scan of the faulty cable should show the fault when compared to the initial footprint.

An actual fault should be fairly easy to fix during favourable weather conditions. The worst case scenario would be if nothing can be found - it would take a lot of courage to switch it on and see what happens - almost like a “bang” test with unlimited energy.

Reagrds,

Alan.
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0 Alan Capon over 5 years ago

The problem here is we won’t know the answer until the fault has been located, brought to the surface and examined. The voltage is new - I think it is the first cable running at 600kV dc. The fault could be a manufacturing fault, a loading / installation fault, or something that has been caused by ground conditions, or it could be damage from excess current caused by the previous fault. Until the fault is located and examined, we won’t know. A “footprint” will have been taken of the cable after installation. A scan of the faulty cable should show the fault when compared to the initial footprint.

An actual fault should be fairly easy to fix during favourable weather conditions. The worst case scenario would be if nothing can be found - it would take a lot of courage to switch it on and see what happens - almost like a “bang” test with unlimited energy.

Reagrds,

Alan.
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