poweralert....

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The_Right_Honourable_Brit said:
Hmm...while Stage 4 does get rid of the nasty 4h slots, I still think being hit twice a day during what I call core hours (6am-10PM) is quite strenuous.
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Actually that can be 3 times a day.
4 to 6, 12 to 2, 8 to 10.
That 4 to 6 is a lot of people's core hours
 
Brian_G said:
The quick jump back to stage 4 this morning seems to hold promise. But why can they suddenly recover from 6 gennie failures overnight?
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I think multiple plants come online and go offline every day. So perhaps the 8 that failed on Friday 16th December, most were forecast to come back online yesterday, perhaps. Eskoms seems unsure itself, TBH. That's how unstable the system is. I can't recall exactly who said it, but one Eskom executive said when plants trip, they usually take between 3 - 6 days to come back online fully. Also it depends on the capacity of the units which trip...a few plants at Camden - won't have a big effect (200MW per plant), but other ones like Medupi and Kusile are beefy boys, with each plant around 800MW or so.
 
wingnut771 said:
The black is coal minus pumped storage, so during the night they are pumping water back.
So the graph shows 15.7GW but there is actually 17.6GW - 1.9GW of water pumping in the below example.
View attachment 1445405
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Gotcha - I downloaded the data and made a proper graph. Makes sense now. What is SCO, any idea? And OCGT pumping?
 
The_Right_Honourable_Brit said:
I think multiple plants come online and go offline every day. So perhaps the 8 that failed on Friday 16th December, most were forecast to come back online yesterday, perhaps. Eskoms seems unsure itself, TBH. That's how unstable the system is. I can't recall exactly who said it, but one Eskom executive said when plants trip, they usually take between 3 - 6 days to come back online fully. Also it depends on the capacity of the units which trip...a few plants at Camden - won't have a big effect (200MW per plant), but other ones like Medupi and Kusile are beefy boys, with each plant around 800MW or so.
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And of course they won't give us detailed breakdowns analogies like this. [unintended pun removed]

There was also talk of trying to find ways to stop tripping from cascading but doesn't seem like that led to anything useful.
 
I see the numbers are pretty insignificant - probably something to do with losses while synchronising, or pumping fuel or similar. But why gas and ocgt?
Eskom_OCGT_SCO_PumpingEskom_Gas_SCO_PumpingHydro_Water_SCO_PumpingPumped_Water_SCO_Pumping
-3.333​
-2​
0​
-2031​
-3.066​
-2​
0​
-1773​

It's really bad that their graph cuts off the bottom - leads to assumption that the thermal gen is the bottom entry on the graph when in fact there are others below it.
 
Sinbad said:
I see the numbers are pretty insignificant - probably something to do with losses while synchronising, or pumping fuel or similar. But why gas and ocgt?
Eskom_OCGT_SCO_PumpingEskom_Gas_SCO_PumpingHydro_Water_SCO_PumpingPumped_Water_SCO_Pumping
-3.333​
-2​
0​
-2031​
-3.066​
-2​
0​
-1773​

It's really bad that their graph cuts off the bottom - leads to assumption that the thermal gen is the bottom entry on the graph when in fact there are others below it.
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I doubt there is anything below the black bars.
 
We are on municipal load shedding (Msunduzi - PMB), but have just been told that Eskom has started switching off parts municipality (half at a time) directly, on top of regular load shedding schedule. It has just been implemented.

WTF????
 
Paulsie said:
We are on municipal load shedding (Msunduzi - PMB), but have just been told that Eskom has started switching off parts municipality (half at a time) directly, on top of regular load shedding schedule. It has just been implemented.

WTF????
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Yup, got hit by this too. We got our own special stage now.
 
Paulsie said:
We are on municipal load shedding (Msunduzi - PMB), but have just been told that Eskom has started switching off parts municipality (half at a time) directly, on top of regular load shedding schedule. It has just been implemented.

WTF????
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That sounds messed up. Have never heard of that before. Down here in CT, it's definitely the municipality that does the LS on behalf of Eskom.
 
The_Right_Honourable_Brit said:
That sounds messed up. Have never heard of that before. Down here in CT, it's definitely the municipality that does the LS on behalf of Eskom.
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Same here, but it sounds like Eskom needed to urgently reduce shedding, independent of the municipal schedule.
Hence cutting off 6 out of 12 primaries at once, with the other 6 following 2 hours later.

What's worse is that it was first reported as major outage with a note that the municipality and eskom to investigate. Report of the additional shedding followed on municipal social media, which has since been deleted.
 
Paulsie said:
We are on municipal load shedding (Msunduzi - PMB), but have just been told that Eskom has started switching off parts municipality (half at a time) directly, on top of regular load shedding schedule. It has just been implemented.

WTF????
Click to expand...
So this would be for municipalities with bad accounts with Eskom correct? if so then why is this not implemented before load shedding?
 
They call it load curtailment. They really should be showing it on their stats but its probably quite a big number.
 
B-1 said:
They call it load curtailment. They really should be showing it on their stats but its probably quite a big number.
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You'd be surprised on how little it actually would be
 
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