I believe you can accomplish what you want using dispatchable loads. Please have a look at the section on dispatchable loads in the manual. Another option is to add fake generators to model the curtailments.

    Ray

On Jan 30, 2008, at 9:45 AM, Boko Soo wrote:

Hello,

1. Suppose I want to determine the demand volume that can be taken closest to the contract and I would have the following function as an objective;
f = c.(Pd -Pd0)
where c is cost of curtailment
Pd0 is the demand volume target.

How could I do that?

2. Suppost I want to add the following constraints to the opf problem.
Pd > Pmin

where Pd is demand volume at a certain bus
Pmin is the minimum demand volume

Thank you

B. Soo

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