Dispatchable load

[nilesh patel]

Hello sir,i have to use fixed load as dispatchable load to reschedule demand 
for overload alleviation.
My question is that after running acopf, i am getting in result each 
 dispatchable load converted to fixed  generation block of 15 MW 
only. Can this block of 15 MW changed to different value?
Thanks.
Nilesh Patel