Worldwide power grid with glass insulated HVDC cables

a year ago

Proposal for a worldwide power grid using glass-insulated HVDC cables to reduce costs and energy loss.
Use of fused silica (glass) as an insulator due to its high insulation properties and low cost.
Innovative cable design with an aluminum conductor and silica insulator, surface-hardened like a Prince Rupert's drop for strength.
Proposed manufacturing process involves continuous extrusion and laying from a ship, eliminating the need for burial.
Optimal voltage for trans-Atlantic transmission calculated at 14 megavolts for 10 Gigawatts capacity.
Converter stations could use air, transformer oil, or molded silica glass for insulation.
Challenges include manufacturing at sea, cable strength, and handling ocean conditions like waves and storms.
Economic analysis suggests a trans-Atlantic cable could cost as little as $23M, significantly cheaper than current options.
Potential issues include cable failure from ship anchors, geological movements, and the need for spare cables.
Open questions remain about silica purity, material alternatives, and feasibility of a prototype.

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