idx_gen

idx_gen()
idx_gen() - Defines constants for named column indices to gen matrix.
Example:

[GEN_BUS, PG, QG, QMAX, QMIN, VG, MBASE, GEN_STATUS, PMAX, PMIN, ...
MU_PMAX, MU_PMIN, MU_QMAX, MU_QMIN, PC1, PC2, QC1MIN, QC1MAX, ...
QC2MIN, QC2MAX, RAMP_AGC, RAMP_10, RAMP_30, RAMP_Q, APF] = idx_gen;

Some examples of usage, after defining the constants using the line above,
are:

 Pg = gen(4, PG);   % get the real power output of generator 4
 gen(:, PMIN) = 0;  % set to zero the minimum real power limit of all gens

The index, name and meaning of each column of the gen matrix is given
below:

columns 1-21 must be included in input matrix (in case file)
 1  GEN_BUS     bus number
 2  PG          Pg, real power output (MW)
 3  QG          Qg, reactive power output (MVAr)
 4  QMAX        Qmax, maximum reactive power output (MVAr)
 5  QMIN        Qmin, minimum reactive power output (MVAr)
 6  VG          Vg, voltage magnitude setpoint (p.u.)
 7  MBASE       mBase, total MVA base of machine, defaults to baseMVA
 8  GEN_STATUS  status, > 0 - in service, <= 0 - out of service
 9  PMAX        Pmax, maximum real power output (MW)
 10 PMIN        Pmin, minimum real power output (MW)
 11 PC1         Pc1, lower real power output of PQ capability curve (MW)
 12 PC2         Pc2, upper real power output of PQ capability curve (MW)
 13 QC1MIN      Qc1min, minimum reactive power output at Pc1 (MVAr)
 14 QC1MAX      Qc1max, maximum reactive power output at Pc1 (MVAr)
 15 QC2MIN      Qc2min, minimum reactive power output at Pc2 (MVAr)
 16 QC2MAX      Qc2max, maximum reactive power output at Pc2 (MVAr)
 17 RAMP_AGC    ramp rate for load following/AGC (MW/min)
 18 RAMP_10     ramp rate for 10 minute reserves (MW)
 19 RAMP_30     ramp rate for 30 minute reserves (MW)
 20 RAMP_Q      ramp rate for reactive power (2 sec timescale) (MVAr/min)
 21 APF         area participation factor

columns 22-25 are added to matrix after OPF solution
they are typically not present in the input matrix
                (assume OPF objective function has units, u)
 22 MU_PMAX     Kuhn-Tucker multiplier on upper Pg limit (u/MW)
 23 MU_PMIN     Kuhn-Tucker multiplier on lower Pg limit (u/MW)
 24 MU_QMAX     Kuhn-Tucker multiplier on upper Qg limit (u/MVAr)
 25 MU_QMIN     Kuhn-Tucker multiplier on lower Qg limit (u/MVAr)