poweralert stage 2.....

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Lupus said:
18 OCGTS used though, kind leans into they aren't using Renewables to offset LS.
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or some more coal broke and renewables and pumped storage just wasn't enough to maintain the stage 3 illusion without burning diesel at 6pm?
 
wingnut771 said:
or some more coal broke and renewables and pumped storage just wasn't enough to maintain the stage 3 illusion without burning diesel at 6pm?
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Well the renewables would've covered it, as with load shedding and VPS they only sent out 27768, but they had 590MW over that available, so if the renewables were used, they wouldn't have needed the 2300MW of renewables, as the 1800MW+600MW is the buffer.
 
Lupus said:
Well the renewables would've covered it, as with load shedding and VPS they only sent out 27768, but they had 590MW over that available, so if the renewables were used, they wouldn't have needed the 2300MW of renewables, as the 1800MW+600MW is the buffer.
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Can you break down that 27768 into its components?
 
Brian_G said:
And that thanks to the miracle extra coal found / stabilised?
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Well it is about 2GW better in generation then last month, but I mean who knows. Though I do like the peak in and peak out stat now. As you can literally see the difference between availability and what they needed to send out.
 
But with wind power, unlike solar, they can't store wind power, correct? So they use it as and when available?

At the very least, it should lower OCGT usage if the wind happens to be blowing at the same time as peak, but it could also cover for breakdowns in the coal fleet during the day if it is indeed providing 2GW of power for many hours of the day.
 

Station build-up for the last 7 days - Eskom Data Portal

This shows how resources were used to build-up the demand over the past 7 days, and it includes both generation and demand side resources that Eskom has contracts with.
www.eskom.co.za www.eskom.co.za
1686724053781.png

System hourly demand and available capacity - Eskom Data Portal

Hourly demand is compared against available capacity, to indicate the amount of surplus/shortfall there was. Available capacity must be matched with the total RSA contracted demand.
www.eskom.co.za www.eskom.co.za
1686724088407.png
1686724065842.png1686724103605.png

Pumped storage generating hours, gas generation & manual load reduction - Eskom Data Portal

The graph below indicates how primary fuel consrained resources where utilized during the past 7 days. Pump storage Gen Unit Hours is the amount of hours that one unit at a pump storage station can generate based on the amount of water still available in the dams. These dams are required to be...
www.eskom.co.za www.eskom.co.za
1686724142702.png
 
wingnut771 said:

Station build-up for the last 7 days - Eskom Data Portal

This shows how resources were used to build-up the demand over the past 7 days, and it includes both generation and demand side resources that Eskom has contracts with.
www.eskom.co.za www.eskom.co.za
View attachment 1540651

System hourly demand and available capacity - Eskom Data Portal

Hourly demand is compared against available capacity, to indicate the amount of surplus/shortfall there was. Available capacity must be matched with the total RSA contracted demand.
www.eskom.co.za www.eskom.co.za
View attachment 1540655
View attachment 1540653View attachment 1540659

Pumped storage generating hours, gas generation & manual load reduction - Eskom Data Portal

The graph below indicates how primary fuel consrained resources where utilized during the past 7 days. Pump storage Gen Unit Hours is the amount of hours that one unit at a pump storage station can generate based on the amount of water still available in the dams. These dams are required to be...
www.eskom.co.za www.eskom.co.za
View attachment 1540663
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Yup was going to paste that, as even the wind there doesn't make sense, they saying it's over 2GW there but in the report it's only 1.8? So it dropped or gained 600MW in that hour? Because the next hour it was at 2.5 and coal had gone up as well? Perhaps they should start ramping coal up sooner so it doesn't hit peak at 8pm :p
Welcome to Eskom where the numbers don't add up and the points don't matter, because it shows technically with all resources combined it would've been 33GW
 
The_Right_Honourable_Brit said:
But with wind power, unlike solar, they can't store wind power, correct? So they use it as and when available?

At the very least, it should lower OCGT usage if the wind happens to be blowing at the same time as peak, but it could also cover for breakdowns in the coal fleet during the day if it is indeed providing 2GW of power for many hours of the day.
Click to expand...
They can't store solar either :-), CSP was under 100MW
 
The_Right_Honourable_Brit said:
But with wind power, unlike solar, they can't store wind power, correct? So they use it as and when available?

At the very least, it should lower OCGT usage if the wind happens to be blowing at the same time as peak, but it could also cover for breakdowns in the coal fleet during the day if it is indeed providing 2GW of power for many hours of the day.
Click to expand...
We've got to include the lie-factor. They've learnt to be careful but obfuscation was happening, makes sense it still is. Unless the ANC has had a change of heart :- )

Maybe if we build about 15% "error" factor into calculations and experiment from there.
 
@wingnut771 do you remember agreeing a few weeks ago that the numbers were meaningless and this whole thread is just an exercise in recording history? I think it may have been bookmarked.. ;)

Lupus said:
They can't store solar either :), CSP was under 100MW
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We don't have molten sand (or was it silicone?) storage units yet?
 
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