The voltage and current of the panel at maximum power point ?

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MUHAMED SIDIBEH
MUHAMED SIDIBEH 2022-2-16
评论： MUHAMED SIDIBEH 2022-2-16
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I want to plot the maximum power point, thereby obtaining the V and I values. Maybe an intersection between x and y axis which can show the MPP.
Io = 0.1*10^-9;
IL = 9.5;
V = linspace(0,0.8,100);
q = 1.6*10^(-19);
k = 1.380649*10^(-23);
T = 298.15;
G =1000;
Gr = 1000;
I = (IL*(G./Gr))-(Io.*(exp((q.*V)./(k.*T))-1));
n = 72;
Vp = V.*n;
Pp = (Vp.*I);
figure(2)
plot(Vp,Pp,'r','linewidth',2);
xlabel('Voltage (V)','fontsize',15);
Pp = V.*I;
ylabel('Power (W)','fontsize',15);
title('PV Panel Power and Voltage Curve','fontsize',18)
grid minor
axis([0,50,0,400])
figure(3)
plot(I,Vp,'k','linewidth',2);
xlabel('Current (A)','fontsize',15);
ylabel('Voltage (V)','fontsize',15);
title('PV Panel Current and Voltage Curve','fontsize',18)
grid minor
axis([0,10,0,50]);
THANKS

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采纳的回答

Jon
Jon 2022-2-16
编辑：Jon 2022-2-16
You could use this approach.
Suppose you first calculate (as I think you show above) equal length vectors of current, I, and voltage V using these values:
% calculate power
P = I.*V;
% find maximum power point and where it occurs
[Pmax,idx] = max(P);
% find the corresponding current and voltage at the maximum power point
Imax = I(idx);
Vmax = V(idx);
% plot the I-V curve and the location of the max power point
plot(I,V)
xlabel('current [amps]')
ylabel('voltage [volts')
yline(Vmax) % horizontal line through voltage where power is maximized
xline(Imax) % vertical line through current where power is maximized
text(Imax,Vmax,['Pmax = ',num2str(Pmax),' [watts]'])
This assumes you can easily compute the I and V curves with lots of points to get sufficient resolution for finding your maximum. You could also take a less brute force approach if you have the optimization toolbox to find the location of the maximum power point.

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