Calculate ramp up and ramp down limits of generators

[dwarfpluto]

Hi Everyone,
I am using IEEE-RTS(1996) data to simulate the unit commitment problem. Ramp rate is given in MW/minute in the paper. I know minimum down/up time too. I tried to find these following ways but they are different from other resource, I refer to.
How can I calculate the ramp up and down limit (MW) of the generators from these data?

E.g. Ramp rate of U76 (coal) => 2 MW/min
MDT : 4 hr, MUT : 8 hr
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i) ramp up/down limit = 2 MW/min * 60 = 120 MW/hr
ii) ramp up limit = (2*60)/MUT = 30 MW/hr
ramp down limit = (2*60)/MDT = 15 MW/hr
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From reference;
ramp up of U76 is '32' MW and ramp down is '0'.

Thank for your kind help.
Regards

 

[waross]

and ramp down is '0'.
When a you ramp up to a load, must that load then be maintained eternally or does the first removal of the load void the warranty?

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[dwarfpluto]

Hi Waross,
Thank for your kind reply. I understand the concept/theory part. I am just not clear how to compute them.