Comment Re:Pointing out the stark, bleeding obvious... (Score 1) 247
Open cycle gas turbines can ramp at approximately 10% of rating per minute, with a cold start delay of approximately 10 minutes.
Gas turbines can do a cold start to 100% output in less than 5 mins, usually 3 mins.
On load change they react in the range of 5 to 10 seconds. Per minute they should be able to change 30% and more.
You other numbers are more or less in the correct range, but either outdated or just "your guesses".
E.G. Most existing combined cycle gas turbines can ramp at approximately 3% of rating per minute, with a 60 minute start up delay from warm, or 3 hours from cold.
That makes no sense. Combined cycle means: it is a gas turbine, followed by an "conventional" plant.
The gas turbine part is as fast as any other gas turbine. Only the "combined cycle" part is as slow as any other coal/gas plant.
Both parts are combined, but from a grid operator point of view they are "two plants".