Is there a MATLAB/SIMULINK block, or how can one build one?
Dear Salah, this is the phase simulation model you want
http://www.mathworks.com/matlabcentral/fileexchange/33952-active-power---reactive-power---power-factor-measurement-in-three-phase-system
It is used in power factor voltage current phase in reactive power systems for inverters etc.
regards Gerro
Hi, I think You can use the "Complex to Magnitude-Angle block" which gives an angle, magnitude or both of these values of complex input signal. So the idea is to use this block separately for voltage and current and compare the outputs. But I'm really not sure if it is a correct solution.
http://www.mathworks.com/help/simulink/slref/complextomagnitudeangle.html
Yes dear Dr. Nalda, we have a small electrical circuit including AC supply and RLC load modeled in SIMULINK, we are able to measure every thing but the angle or the power factor. Thank you so much.
Great thanks dear Dr. Prinsloo and dear Dr. Kopcek that is what I was exactly looking for. It helped me so much. The idea as well will help me.
see the attachment for the Simulink version.
It's also possible in MATLAB :
close all;
clear all;
x = 0:1e-6:60e-3; % bis 60 ms mit 1µs Schritte
a = sin(2*pi*50*x);
b = sin(2*pi*50*x-pi);
y_rad=acos(dot(a,b)/(norm(a)*norm(b)))
y_deg=y_rad*360/(2*pi)
plot(x,a,x,b)
xlabel(['Anglein degree ist: ',num2str(y_deg)],'Color','r')
grid on;
%%
the arccosine gives out only range of usual principal value in degrees: 0° ≤ y ≤ 180°. So you should know which signal is the first and which is the second.
kind regards
Dear Taha Lahlou , thank you for your answer. I am trying to implement your scheme for the simulations I am perfoming but fail to understand how it works. Would you kindly suggest some paper or text where I could find some additional info.
I am also confused about the fcn block that appears in the upper part of the scheme, would you kindly clarify its role in the model.
Thanks in advance and BR!
Juan Cabeza
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