Hello,
I have defined binary decision variables in order to allow production only at
certain levels:
s.t. Limit_power_levels1{t in TIME}: P[t] - (sum{lev in PLEVELS}
exactprod[t,lev]*plev[lev]) = 0;
s.t. Limit_power_levels2{t in TIME}: sum{lev in PLEVELS} exactprod[t,lev] = 1;
...
set PLEVELS:= 1 2 3 4;
param plev:=
1 0
2 10
3 25
4 40
plev are the allowed production levels, exactprod are the binary decision
variables, P is the production
This works very well.
However, I would like to run the program with the -nomip option because of
increased speed. Obviously, in this case the binary decision variables are not
necessarily binary any more.
At most timesteps they still take the values of 0 or 1, but for example in
timestep 4 they don't (see below).
Are there any additional conditions I could use in order to force the variables
exactprod to be quasi-binary while still using the -nomip option?
Thank you very much for your help
Wolfgang
Time Price P exactprod(t,1) exactprod(t,2) exactprod(t,3) exactprod(t,4)
1 10 0 1.0 0.0 0.0 0.0
2 20 0 1.0 0.0 0.0 0.0
3 30 0 1.0 0.0 0.0 0.0
4 40 10 0.8 0.0 0.0 0.2
5 45 40 0.0 0.0 0.0 1.0
6 65 40 0.0 0.0 0.0 1.0
7 60 40 0.0 0.0 0.0 1.0
8 55 40 0.0 0.0 0.0 1.0
9 50 40 0.0 0.0 0.0 1.0
10 45 40 0.0 0.0 0.0 1.0
11 25 0 1.0 0.0 0.0 0.0
12 10 0 1.0 0.0 0.0 0.0
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