Module idx_bus

source code

Defines constants for named column indices to bus matrix.

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

   Pd = bus[3, PD]     # get the real power demand at bus 4
   bus[:, VMIN] = 0.95 # set the min voltage magnitude to 0.95 at all buses

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

columns 0-12 must be included in input matrix (in case file)

0. BUS_I bus number (1 to 29997)
1. BUS_TYPE bus type (1 = PQ, 2 = PV, 3 = ref, 4 = isolated)
2. PD real power demand (MW)
3. QD reactive power demand (MVAr)
4. GS shunt conductance (MW at V = 1.0 p.u.)
5. BS shunt susceptance (MVAr at V = 1.0 p.u.)
6. BUS_AREA area number, 1-100
7. VM voltage magnitude (p.u.)
8. VA voltage angle (degrees)
9. BASE_KV base voltage (kV)
10. ZONE loss zone (1-999)
11. VMAX maximum voltage magnitude (p.u.)
12. VMIN minimum voltage magnitude (p.u.)

columns 13-16 are added to matrix after OPF solution they are typically not present in the input matrix

(assume OPF objective function has units, u)

13. LAM_P Lagrange multiplier on real power mismatch (u/MW)
14. LAM_Q Lagrange multiplier on reactive power mismatch (u/MVAr)
15. MU_VMAX Kuhn-Tucker multiplier on upper voltage limit (u/p.u.)
16. MU_VMIN Kuhn-Tucker multiplier on lower voltage limit (u/p.u.)

additional constants, used to assign/compare values in the BUS_TYPE column

1. PQ PQ bus
2. PV PV bus
3. REF reference bus
4. NONE isolated bus