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Sandy Lawrence · @swlawrence

33 followers · 175 posts · Server aus.social

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Utility Dive: "Why HVDC cables are poised to provide valuable alternatives." Moving bulk electric power over long distances is a huge part of adding renewables like wind + solar. In U.S. historically this has been performed by high-voltage alternating current (HVAC) transmission lines, though high-voltage direct current (HVDC) transmission has much more often been deployed in many other parts of the world. Over long-distances HVDC actually cost-effective, 'can transport more power farther without the dielectric or capacitive losses experienced by AC cables over very long distances,' + can be deployed underground in a much narrower right-of-way (ROW) than overhead transmission lines. "Instead of a 150- to 300-foot-wide ROW for a high-voltage overhead line, an underground HVDC cable with similar capacity can be installed in a 10-foot ROW," though with a temporary 50-foot construction easement. 'Provides a system that is highly resilient against extreme weather, vegetation interference and potential pushback from local residential and commercial landowners.' While there are higher upfront costs of underground installation, factoring in lower maintenance costs, reduced wildfire risk + pure aesthetics argues for more support for underground HVDC, especially installed parallel to railroad lines + highways. Personally, I would be much more accepting of temporary excavation for underground lines than permanent high-tower transmission pylons. #highvoltage #directcurrent #electricgrid