It is in fact a thing: https://en.m.wikipedia.org/wiki/Flywheel_storage_power_sy... | Hacker News

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		rich_sasha 8 months ago \| parent \| context \| favorite \| on: Widespread power outage in Spain and Portugal It is in fact a thing: https://en.m.wikipedia.org/wiki/Flywheel_storage_power_syste... I believe (but I am 0% expert) these are mostly but not exclusively used for adding inertia to the system, rather than real energy storage.

immibis 8 months ago [–]

Close, but you're looking for: https://en.wikipedia.org/wiki/Synchronous_condenser

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