Module makeApq

Construct linear constraints for generator capability curves.

Constructs the parameters for the following linear constraints implementing trapezoidal generator capability curves, where Pg and Qg are the real and reactive generator injections:

   Apqh * [Pg, Qg] <= ubpqh
   Apql * [Pg, Qg] <= ubpql

data constains additional information as shown below.

Example:

   Apqh, ubpqh, Apql, ubpql, data = makeApq(baseMVA, gen)

   data['h']      [Qc1max-Qc2max, Pc2-Pc1]
   data['l']      [Qc2min-Qc1min, Pc1-Pc2]
   data['ipqh']   indices of gens with general PQ cap curves (upper)
   data['ipql']   indices of gens with general PQ cap curves (lower)