I want to simulate a sine waveform with voltage sag in MATLAB (mfile). How can I do this?

I want to simulate a sine waveform with voltage sag in MATLAB (mfile). How can I do this?

Answer 1

[Voss]

t=0:0.0001:0.3;
f=50;
Vm=1.4;
Vsag=0.2;

V = Vm*sin(2*pi*f*t);

idx = t > 0.1 & t < 0.2;
V(idx) = V(idx)*Vsag/Vm;

plot(t,V,'LineWidth',2);

set(gca(), ...
    'Color','k', ...
    'XColor','w', ...
    'YColor','w', ...
    'XGrid','on', ...
    'YGrid','on', ...
    'GridColor','w', ...
    'GridAlpha',1, ...
    'TickLength',[0; 0], ...
    'XTickLabel',{}, ...
    'YTickLabel',{});

Answer 2

[sajad Tarverdian]

Thanks for answering the previous question, what codes should be written now to get and draw the effective voltage value( true RMS) in this question?

[Voss]

t=0:0.0001:0.3;
f=50;
Vm=1.4;
Vsag=0.2;

V = Vm*sin(2*pi*f*t);
Vrms = Vm/sqrt(2)*ones(1,numel(t));

idx = t > 0.1 & t < 0.2;
V(idx) = V(idx)*Vsag/Vm;
Vrms(idx) = Vrms(idx)*Vsag/Vm;

plot(t,V,'LineWidth',2);
hold on
plot(t,Vrms,'LineWidth',2,'Color','r','LineStyle','--');

set(gca(), ...
    'Color','k', ...
    'XColor','w', ...
    'YColor','w', ...
    'XGrid','on', ...
    'YGrid','on', ...
    'GridColor','w', ...
    'GridAlpha',1, ...
    'TickLength',[0; 0], ...
    'XTickLabel',{}, ...
    'YTickLabel',{});

[sajad Tarverdian]

Thank you very much