HVDC systems can solve one of renewable energy’s biggest challenges: consistent supply. Via WIREDUK
Submarine HVDC cables are preferable to overland cables because ships can carry a lot more cable per trip than trucks. XLCC’s methanol-fueled hybrid vessel, which will cost up to £300 million , will carry 160 km out to sea at once—a truck could only carry 1 km.
Nevertheless, unexpected damage at any of the cables’ 95 joints could enforce long and expensive periods of downtime. “Things do break,” Van Hertem said. “There are parts that go up to 700 meters deep. If that spot is where your cable is broken, it isn’t going to be too easy. These are thick cables. They don’t bend that well. It is possible. But it’s hard to fix.”
The threat of terrorist attacks stokes one fear. Utilities have presented attractive targets to violent extremist organizations over the past 40 years, and annual attacks on these facilities have risen by over 350 times at two points during the past decade, according to theBut professor Karen Smith Stegen, an expert in the politics of renewable energy at Jacobs University, says concerns about terrorism would be minimized once countries developed diverse networks of interconnectors.
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