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A comment on Portugal just ran on 100% renewables for six days in a row. Parent comment

Re:Portugal just ran on 100% renewables for six days in a row by syllablehq on Friday November 17, 2023 @12:04AM (#38299799)
There's lots of exciting progress happening with underground mechanical storage like this. It's so interesting that the U.S. DOE has been studying underground pumped hydro since at least the 1980.(https://www.osti.gov/servlets/purl/6517343)

Today: - Hydrostor just signed a near $1 Billion contract to build their first underground facility in California using advanced compressed air with water to help efficiency. See also: Green Gravity, Gravitricity, Terrament, Renewell, RheEnergise, and more.

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Re:Portugal just ran on 100% renewables for six days in a row by kuchenbecker on Friday November 17, 2023 @05:50AM (#38301825)
My comment is less about storage and more about the physics of the Grid. It's largely one giant multitenant pool of both capacity and consumption with Voltage being the indicator.

Variable load sources often change transmission requirements on existing lines because there can be power draw increase between A and B where previous there was less generation at A.

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