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National Grid, Low frequency disconnecting system.

broadgage
As is fairly well known, any excessive drop in UK grid frequency results in calls for increased generation from quick starting plant such as OCGT and pumped storage, and for increased output from already running generating capacity.

If this does not relieve matters, then areas are disconnected by frequency sensitive relays in order to preserve the rest of the system. This last happened in August 2019 IIRC.


My question is what will happen during the NEXT low frequency event ?

Will the SAME areas be blacked out via the same (or similar replacement) relays operating the same switchgear as last time.

Or are settings adjusted after a low frequency event, such that next time the burden will fall on different areas.


The first approach sounds simpler, but the second approach is fairer. Or are such low frequency events so rare that "fairness" is not considered important.
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    I strongly suspect that any widespread and prolonged power cut WOULD result in chaos broadly similar to that in Texas. Very few individuals and businesses are properly prepared for such an event.


    My enquiry was however about a relatively short term outage like the event in August 2019. If/when it happens again, will the SAME areas be blacked out as last time, or will the next low frequency event affect DIFFERENT areas.
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    I strongly suspect that any widespread and prolonged power cut WOULD result in chaos broadly similar to that in Texas. Very few individuals and businesses are properly prepared for such an event.


    My enquiry was however about a relatively short term outage like the event in August 2019. If/when it happens again, will the SAME areas be blacked out as last time, or will the next low frequency event affect DIFFERENT areas.
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