Good day,
I am learning MatPower and have a case to study with 8 buses. The below
example a simplification:
I could understand how to build buses and links and simulate the energy
flow. Results look right,
however I have a question since the buses are working on different
voltage levels, hence some
links have power transformers.
*** Bus 2: 90 kV - Feeder bus ***
*** Bus 3: 30 kV - Load bus ***
*** Bus 5: 690 V - Load bus ***
<Bus 2>---(90/30kV XFR)---<Bus 3>---(30/.69 kV XFR)---<Bus 5>
Bus 2 to bus 3 is a 16 MVA transformer with impedance 10.5%
Bus 3 to bus 5 is a 5 MVA transformer with impedance 6.5%
At the moment, the bus definition looks like this:
mpc.bus = [
2 3 0.0 0.0 0 0 1 1 0 90.0 1 1.1 0.9;
3 1 7.2 2.1 0 0 1 1 0 30.0 1 1.1 0.9;
5 1 3.5 0.1 0 0 1 1 0 0.69 1 1.1 0.9;
];
And branches definition is incomplete:
mpc.branch = [
2 3 0.1 0 0 250 250 250 0 0 1 -360 360;
3 5 0.1 0 0 250 250 250 0 0 1 -360 360;
];
Is this right transformers are set in "Branches" ? How do we calculate
and set resistance branches
resistance and and reactance in order to properly integrate transformers
as for example in above
case ?
Thank you for support,
Regards,
Jean-François Simon
