HOW CAN DO PV MODULE WITH VARING TEMPERETURE IN MATLAB ?

clc

Top= 30:20:90;

q = 1.6e-19

k = 1.3805e-23

A = 1.6

B = 1.6

N = 36

Np=1

voc = 21.24

vt=N*k*A*Top/q

Tref = 25

Ego = 1.1

Iph=2.55+0.0017*(Top-25)

for w= N*k*A*Top/q

Irs=2.55/(exp(voc/w)-1)

end

Io=Irs*(Top/Tref).^3*exp (q*Ego *0.0066666667 /B*k)

x=[0:21.24]

D= N*k*A*Top/q

for z=length(D)

for Vpv=0:length(x)

% Ipv=Np*Iph-N*Io *

(exp(x/D)-1)

% plot ( x,Ipv )

end

end

Answer 1

[Suraj Kumar]

Hi @aya,

From what I gather, you want to simulate the PV module in MATLAB with varying temperatures. To achieve this, you can do the following modifications in the code:

1. Convert the temperature range from Celsius to Kelvin for accurate calculations involving Boltzmann's constant.

Top = 30:20:90; 
% Convert temperatures to Kelvin 
TopK = Top + 273.15;

2. Calculate the necessary parameters like thermal voltage (vt), photocurrent (Iph), reverse saturation current (Irs), and saturation current (Io) for modelling the PV module's behavior.

for i = 1:length(TopK) 
    T = TopK(i); 
    vt = N * k * T / q; % Thermal voltage 
    Iph(i) = 2.55 + 0.0017 * (T - 298.15); % Photocurrent 
    Irs(i) = 2.55 / (exp(voc / vt) - 1); % Saturation current 
    Io(i) = Irs(i) * (T / Tref)^3 * exp(q * Ego * (1/Tref - 1/T) / (B * k)); % Saturation current 
    D(i) = vt; 
end 

3. Use linspace to define a smooth voltage range and iterate over this range to compute and plot the I-V curves for each temperature.

figure; 
hold on; 
x = linspace(0, voc, 100);   
for i = 1:length(TopK) 
    Ipv = Np * Iph(i) - N * Io(i) * (exp(x / D(i)) - 1); 
    plot(x, Ipv); 
end 

You can refer to the output below for a better understanding:

Happy coding!