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flywheel to keep the Hz up to prevent blackouts

jcm
I suppose it had to happen these ugly blights on the tops of mountains can now cause blackouts ,  yesterday as I look around mountains (not much breeze) one or two turbines try to turn a little then fall back exausted. Not sure how this flywheel works ? , although it must take a lot of power to get it rotating. Glad to hear that they are now keeping Kilroot power station open (it was running  coal / oil and owned by the AES Corporation). In 2019 it was sold to a subsidiary of Energetický a průmyslový holding. They are going to converting it to gas.    


www.theguardian.com/.../giant-flywheel-project-in-scotland-could-prevent-uk-blackouts-energy



EXCLUSIVE. £1MILLION was paid out to wind farm owners to turn off their turbines and stop generating electricity for Northern Ireland's power grid for 20 months.7 hours ago


And in january:-

Wind farms paid up to £3 million per day to switch off turbineswww.telegraph.co.uk › News › Politics

19 Jan 2020 - Wind farms were paid up to £3 million per day to switch off their turbines and not produce electricity last week, The Telegraph can disclose. ... the additional expense of a £1 billion interconnector that is itself proving unreliable.

No further comment needed. Regards

jcm
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    Flywheels for energy storage can work but they are not cheap or simple.

    There is a design used in large UPS systems which has a device that looks a bit like a motor or generator except that the "stator" is rotating round the rotor at twice the synchronous speed. The rotor is on the same shaft as a standard synchonous motor / generator. If the power fails the generator shaft starts to slow down and rotating mass is connected magnetically to its rotor and speeds the shaft up again. This continues until the rotating mass has dropped to the same speed as the shaft - typically 3 secs but 3 secs is long enough for a diesel generator - also on the same shaft - to start and, because the whole system has never lost sync with its neighbours there is no time lost trying to sync anything.

    But 3 secs is all the storage that this arrangement provides and it consumes about 50kW in overcoming air resistance to keep it running. They come in 2MW modules and a typical computer data centre might have 30 of them.
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  • 0
    Flywheels for energy storage can work but they are not cheap or simple.

    There is a design used in large UPS systems which has a device that looks a bit like a motor or generator except that the "stator" is rotating round the rotor at twice the synchronous speed. The rotor is on the same shaft as a standard synchonous motor / generator. If the power fails the generator shaft starts to slow down and rotating mass is connected magnetically to its rotor and speeds the shaft up again. This continues until the rotating mass has dropped to the same speed as the shaft - typically 3 secs but 3 secs is long enough for a diesel generator - also on the same shaft - to start and, because the whole system has never lost sync with its neighbours there is no time lost trying to sync anything.

    But 3 secs is all the storage that this arrangement provides and it consumes about 50kW in overcoming air resistance to keep it running. They come in 2MW modules and a typical computer data centre might have 30 of them.
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