Case files with transformers that perform voltage transformation.

[Abijith20]

Does the MATPOWER library contain any case files featuring transformers that perform voltage transformation? While exploring the case files, I encountered case14.m, which includes transformers, but appears not to involve voltage transformation. Are there other case files within MATPOWER that demonstrate this functionality?

[rdzman]

By "voltage transformation" I assume you mean a transformer that connects two buses with different values for basekV. Unfortunately, it looks like the basekV values in case14 are all 0 so we just don't have that information.

I'm afraid I don't know about other cases off the top of my head, but it should be simple to write a script to for any branch that connects buses with different basekV ... those branches should be transformers that are doing "voltage transformation".

[Abijith20]

%% system MVA base mpc.baseMVA = 1;

%% bus data % bus_i type Pd Qd Gs Bs area Vm Va baseKV zone Vmax Vmin mpc.bus = [ 1 3 0 0 0 0 1 1 0 66 1 1.1 0.9; 2 1 0.4 0.2 0 0 1 1 0 11 1 1.1 0.9; 3 1 0.4 0.2 0 0 1 1 0 11 1 1.1 0.9; 4 1 0.4 0.2 0 0 1 1 0 11 1 1.1 0.9; ];

%% generator data % bus Pg Qg Qmax Qmin Vg mBase status Pmax Pmin Pc1 Pc2 Qc1min Qc1max Qc2min Qc2max ramp_agc ramp_10 ramp_30 ramp_q apf mpc.gen = [ 1 0 0 10 -10 1.05 100 1 10 0 0 0 0 0 0 0 0 0 0 0 0; ];

%% branch data % fbus tbus r x b rateA rateB rateC ratio angle status angmin angmax mpc.branch = [ 2 3 0.206 0.079 0 0 0 0 0 0 1 -360 360; 1 2 0.206 0.079 0 0 0 0 1 0 1 -360 360; 4 3 0.206 0.079 0 0 0 0 0 0 1 -360 360; ];

Does this script mean that I have a transformer between bus 1 and 2 which transforms the voltage from 66 kV to 11 kV?

[rdzman]

Yes.