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

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sajad Tarverdian
sajad Tarverdian 2022-2-18
编辑： sajad Tarverdian 2022-3-7
I want to simulate a sine waveform with voltage sag in MATLAB (mfile). How can I do this?

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采纳的回答

Voss
Voss 2022-2-19
Ran in:
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',{});

更多回答（1 个）

sajad Tarverdian
sajad Tarverdian 2022-2-27
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?
  2 个评论
Voss
Voss 2022-2-27
Ran in:
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',{});

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