I'm finding it difficult to execute loadcase functions using MATPOWER toolbox.

i get the error message below when i run my code.

Error Message:

>> nath

Attempt to execute SCRIPT loadcase as a function:

C:\Users\vicky brandelle\Desktop\matpower7.1\lib\loadcase.m

Error in nath (line 2)

mpc = loadcase('case15');

Code :

% Load IEEE 15-bus System Data

mpc = loadcase('case15');

% Original Power Flow Analysis

results_initial = runpf(mpc);

% Introduce On-Load Tap Changer (OLTC) at bus 5

regulated_bus = 5;

% Change the type of bus 5 to PV (V controlled, P specified)

mpc.bus(regulated_bus, BUS_TYPE) = 2;

% Define the tap limits and set the initial tap position

tap_min = 0.9;

tap_max = 1.1;

initial_tap = 1.0;

mpc.branch(end+1, :) = [regulated_bus regulated_bus 0.0 tap_min tap_max 0.0 initial_tap 0.0 0.0 0.0 0.0 0.0];

% Power Flow Analysis with OLTC

results_with_oltc = runpf(mpc);

% Display Bus Voltages

fprintf('Initial Bus Voltages:\n');

disp(results_initial.bus(:, VM));

fprintf('Bus Voltages with OLTC:\n');

disp(results_with_oltc.bus(:, VM));

% Compare Line Losses

loss_initial = sum(results_initial.branch(:, PT));

loss_with_oltc = sum(results_with_oltc.branch(:, PT));

fprintf('Initial Total Line Loss: %.2f MW\n', loss_initial);

fprintf('Total Line Loss with OLTC: %.2f MW\n', loss_with_oltc);

Answer 1

[Image Analyst]

You have a file called loadcase.m. The code in that file is a script, not a function. So it cannot take an input argument. Yet you tried to do exactly that in this line:

mpc = loadcase('case15');

Hence it threw that error.

You forgot to attach loadcase.m so we can't check it. But I imagine the suspected fix is to add a line to the beginning of loadcase.m that looks like this:

function loadcase(filename)