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Author Topic: Aberthaw Power Station  (Read 1085 times)
SandTEngineer
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« on: December 13, 2019, 04:02:32 pm »

Aberthaw, the last coal fired power station in Wales, ceased production at 1530 today (Friday 13/12/2019) with the likely loss of 170 jobs over the next few months.

End of another era........
« Last Edit: December 14, 2019, 10:03:07 am by SandTEngineer » Logged
broadgage
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« Reply #1 on: December 13, 2019, 05:46:43 pm »

Poor timing IMHO, I can see the need to reduce carbon emissions by reducing and then eliminating coal burning.
But it might have made more sense to keep the power station operational until the end of this winter for "just in case".

By NEXT winter we should have more renewable capacity, and it is uneconomic to keep aging coal burning plant on standby for years, but a few weeks might have been prudent.

Especially as both reactors at Hunterston B wont be available for this winter.
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A proper intercity train has a minimum of 8 coaches, gangwayed throughout, with first at one end, and a full sized buffet car between first and standard.
It has space for cycles, surfboards,luggage etc.
A 5 car DMU is not a proper inter-city train. The 5+5 and 9 car DMUs are almost as bad.
stuving
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« Reply #2 on: December 13, 2019, 07:25:42 pm »

Especially as both reactors at Hunterston B wont be available for this winter.

Not to mention the risk of a large drop in French production. So far workers in the electricity and gas industries have been kept out of the brouhaha about pensions, though in the long term the plan is for them to lose their special pension schemes just like the railway workers. Apparently (and I've not found a source of data to check these figures) there is a loss of about 1.5 GW most days, but France is, surprisingly, not consistently a nett exporter these days in any case.
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broadgage
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« Reply #3 on: December 14, 2019, 09:59:17 am »

Agree.
BTW, French electricity production data may be found here;
https://www.gridwatch.templar.co.uk/france/
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A proper intercity train has a minimum of 8 coaches, gangwayed throughout, with first at one end, and a full sized buffet car between first and standard.
It has space for cycles, surfboards,luggage etc.
A 5 car DMU is not a proper inter-city train. The 5+5 and 9 car DMUs are almost as bad.
stuving
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« Reply #4 on: December 14, 2019, 10:56:53 am »

Agree.
BTW, French electricity production data may be found here;
https://www.gridwatch.templar.co.uk/france/

I've worked out why the data I had found from RTE were inconsistent (with themselves and that Gridwatch panel) - I was in the bit of the RTE site for energy traders. That deals in energy flow predictions (updated until they become actual and then they disappear), and without links to their real-time data.

There is a link on Gridwatch to RTE's pretty presentation graphs, which show that when wind power is "on" RTE exports all day: from zero at their peak demand up to 6 GW. There is also about 6 GW of pumped storage, but with peak-trough of 15-20 GW more is needed.

So there are huge swings, notably when French generation is low for whatever reason. For some that's known (calm, shut-downs, strikes...) but RTE also talk about "the normal operation of the energy market"; I presume that means importing (mostly German windpower) when it's cheaper than what EDF can turn off.
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SandTEngineer
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« Reply #5 on: December 14, 2019, 12:04:33 pm »

According to info elsewhere that now leaves the following UK coal fired power stations:

Drax (what hasn't been converted to biomass)
Fiddler's Ferry
Kilroot
Ratcliffe-on-Soar
West Burton

Fiddler's Ferry next to go in 3 months time.
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didcotdean
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« Reply #6 on: December 14, 2019, 12:11:33 pm »

At this moment, despite UK wind being not far off the peak (~12GW/33%) and ~2.25 GW/6.25% from solar, imports are maxed out on 4 out of the 5 interconnectors (~5.5GW/13%). Still it is giving the gas plant a bit of a rest as it is at only around 50% of capacity.
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broadgage
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« Reply #7 on: December 14, 2019, 01:12:29 pm »

I know someone whom works at a power station that receives extra payments from National Grid for being capable of a "black start"
Most power stations require an external source of electricity to run auxiliary plant before electricity can be produced. This is normally obtained from the transmission system.

A minority of power stations have black start capability whereby they can be started up without any external power.
The basic requirements are the ability to start at least one main generating unit/module within a specified time, and to do this at least three times, in case the grid fails before the plant is running, and once running to accept large step changes in load.
This is usually achieved by diesel engines that start from air bottles or batteries, in order to run essential equipment.

The most recent test of the black start capability was a failure.
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A proper intercity train has a minimum of 8 coaches, gangwayed throughout, with first at one end, and a full sized buffet car between first and standard.
It has space for cycles, surfboards,luggage etc.
A 5 car DMU is not a proper inter-city train. The 5+5 and 9 car DMUs are almost as bad.
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