To implement phasor modeling in MATLAB for a 48-pulse NPC converter:

Phasor Representation- Represent voltages, currents, and power using complex numbers in the form V = Vm * exp(j * omega * t + phi).

System Parameters- Identify system parameters such as line voltages, converter parameters, and load characteristics.

Control Design- Modify the control algorithm for phasor mode. Ensure control outputs are in phasor form, with reference values in magnitude and phase angle.

Converter Model- Adapt the converter model for phasor mode by replacing time-dependent variables with phasor equivalents (e.g., replace sin(omega * t) with exp(j * omega * t)).

Grid Connection- Represent grid parameters and connections in phasor form.

Simulation Settings- Adjust simulation settings for the phasor domain, including solver options and simulation time.

Verification- Verify accuracy by comparing phasor model results with the continuous time-domain model. Check consistency in active/reactive power, voltage magnitudes, and current waveforms.

a simple example:

% Define parameters

Vm = 1; % Magnitude of voltage

omega = 2*pi*50; % Angular frequency (50 Hz)

% Time vector

t = linspace(0, 0.02, 1000);

% Phasor representation

V = Vm * exp(1j * omega * t);

% Plotting

figure;

plot(t, real(V), 'r', t, imag(V), 'b');

xlabel('Time (s)');

ylabel('Voltage Phasor');

legend('Real', 'Imaginary');

title('Phasor Representation');

grid on;