Hello everyone! I want to define an if condition in a constraint. I will have different constraints if the variable is positive or negative (Pb >0.0 or Pb <0.0), and you can see this part of the code; for i in 1:5, t in 1:24 if Pb[i,t] <= Zeromat @constraint(m, e[i,t] - e[i,t.-1] + 0.85 *Pb[…

You need to set up a binary variable (integer variable constrained by 0 <= Z[I,t] <= 1) that takes a different value depending on the sign of Pb[I,t]. (C.f. Big M method - Wikipedia ) Then you can simply write your constraint as e[i,t] - e[i,t.-1] + (0.85 + (-1.11-0.85)*Z[i,t]) * Pb[i,t.-1] == 0.0…

Defining an if condition in a constraint

Specific Domains Optimization (Mathematical)

jacobusmmsmit February 11, 2022, 11:03am 2

I’m not an experienced JuMP user, but I think you are looking for @NLconstraint.

Here is an example:

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