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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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    These flywheels are to assist with short term stability. Any sudden drop in grid frequency will result in the flywheel slowing and therefore giving up energy to the grid and thereby limiting the frequency fall.

    Historically the large rotating mass of steam turbines and alternators coupled thereto provided this inertia, but these days more and more input to the grid is via static converters that provide no inertia.


    Flywheels of any reasonable size wont help for other than "second to second" stability. Bulk energy storage requires either pumped storage, or increasingly utility scale batteries. IIRC we already have about 0.5 GWH of battery storage, and another 4 GWH are proposed. 

    For the foreseeable future we will still need to burn gas at times of low renewable input, but it seems prudent to reduce gas reliance as far as possible.
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  • 0
    These flywheels are to assist with short term stability. Any sudden drop in grid frequency will result in the flywheel slowing and therefore giving up energy to the grid and thereby limiting the frequency fall.

    Historically the large rotating mass of steam turbines and alternators coupled thereto provided this inertia, but these days more and more input to the grid is via static converters that provide no inertia.


    Flywheels of any reasonable size wont help for other than "second to second" stability. Bulk energy storage requires either pumped storage, or increasingly utility scale batteries. IIRC we already have about 0.5 GWH of battery storage, and another 4 GWH are proposed. 

    For the foreseeable future we will still need to burn gas at times of low renewable input, but it seems prudent to reduce gas reliance as far as possible.
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