poweralert....

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5 trips in rapid succession?
2 possibilities - a coordinated sabotage plan, or a cascading fail that they managed to arrest.
 
R13... said:
Old equipment is prone to breakdown and it is not the first they have tripped multiple units within a short period of each. You don't think they all tripped in sync, do you?
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Given the implementation of loadshedding with zero warning (literally), yes I do think they all tripped within minutes of each other.
 
Sinbad said:
Given the implementation of loadshedding with zero warning (literally), yes I do think they all tripped within minutes of each other.
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Or two tripped, then a third, but when 4 and 5 tripped they couldn't hold on any longer. They run the system so that it can withstand a few trips, but margins have become thinner so 5 is a bit much.
 
Sinbad said:
Coincidence then?
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Too many of those. And one only per power station x 5 is pure fiction by now.

Coordinated sabotage, maybe, not being discussed anymore by Eish or anc.
Most other options all seem to come back to one or another source of sabotage anyway.
Finally - incompetence. Doesn't explain how they manage to recover every time.
 
R13... said:
Old equipment is prone to breakdown and it is not the first they have tripped multiple units within a short period of each. You don't think they all tripped in sync, do you?
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I do yes. Old equipment in USA seems to work just fine. It's not like we have much to go on. Yes, it's not the first time, it happens all the time. We are saying that they trip because they are overloaded and the circuit breakers trip to protect themselves. You say they are old and just decide to blow steam pipes all at the same time. Which one is more logical?
 
R13... said:
Or two tripped, then a third, but when 4 and 5 tripped they couldn't hold on any longer. They run the system so that it can withstand a few trips, but margins have become thinner so 5 is a bit much.
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What do you think happens when they can't reduce the load fast enough when the first 1 or 2 trip?
 
wingnut771 said:
What do you think happens when they can't reduce the load fast enough when the first 1 or 2 trip?
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Isn't that the whole point - how is it that cascading isn't happening here, and then that's the same case at 5 different locations? Doesn't add up.

And late at night? Nah
 
Brian_G said:
Isn't that the whole point - how is it that cascading isn't happening here, and then that's the same case at 5 different locations? Doesn't add up.

And late at night? Nah
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Late at night has a 20GW load. We have about 18GW of coal, plus koeberg (1.8) and imports (1.3) minus pumped storage pumping back (2.5) - so we are always on the edge.
 
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