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Power Outage at Heathrow Airport - Realiability and Resilience 1
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LittleInch
Petroleum
This is partly covered in the disaster forum?
There were no fire walls and no sprinkler system (not sure that would be a good thing with 275kV flying around)
There was redundancy to a certain extent but the fire took it out.
Heathrow had three main feeds, but two of the main terminals were mainly on one supply and switching over required power down and no one was sure if the other two could cope with a full load and they didn't want it to trip in the middle of the day.
why it caught fire in the first place? Don't know and haven't seen anything other than the TXs were pretty ancient.
There were no fire walls and no sprinkler system (not sure that would be a good thing with 275kV flying around)
There was redundancy to a certain extent but the fire took it out.
Heathrow had three main feeds, but two of the main terminals were mainly on one supply and switching over required power down and no one was sure if the other two could cope with a full load and they didn't want it to trip in the middle of the day.
why it caught fire in the first place? Don't know and haven't seen anything other than the TXs were pretty ancient.
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According NESO (UK TSO):
NESO will submit an initial report to the Secretary of State and Ofgem within 6 weeks, with an initial assessment of the data available at this stage of the review.
NESO will provide a final report to the Secretary of State and Ofgem by end of June 2025, which will include recommendations and lessons for the future and where possible, a proposed implementation plan.
Key findings and recommendations of the review will be published by NESO.
NESO will submit an initial report to the Secretary of State and Ofgem within 6 weeks, with an initial assessment of the data available at this stage of the review.
NESO will provide a final report to the Secretary of State and Ofgem by end of June 2025, which will include recommendations and lessons for the future and where possible, a proposed implementation plan.
Key findings and recommendations of the review will be published by NESO.
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Report are available below link:
www.neso.energy
Main cause was moisture in bushing phase "C" which causes an insulation failure and shorts circuit happened. In 2018 already NESO knows that moisture had high levels but they delayed hat maintenance. Also the fire caught adjacent SGT because no concrete walls were built. Substation was built in 1968.
North Hyde Review | National Energy System Operator
NESO publishes its final report from the review into the North Hyde Substation outage which took place on 20 March and led to the closure of Heathrow Airport.
www.neso.energy
Main cause was moisture in bushing phase "C" which causes an insulation failure and shorts circuit happened. In 2018 already NESO knows that moisture had high levels but they delayed hat maintenance. Also the fire caught adjacent SGT because no concrete walls were built. Substation was built in 1968.
LittleInch
Petroleum
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