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by cf100clunk 498 days ago
At one site in a jungle, my employer had an electrically driven flywheel built that ran on that country's mains grid, paired with an AC alternator on the flywheel that fed the building. This solved a variety of frequency and voltage problems, including mains outages. If the mains went dark, a diesel generator would kick in to boost the flywheel RPMs on an as-needed basis rather than constantly run.