matlab code to plecs

Question

Hi

I am working on the MPPT algorithm (P&O) and I did it in MATLAB function and it works. However, I cannot transfer it to C-script, and I dunno how it works in plecs.

could anyone help, the script is as follows:

 

function duty = MPPT_algorithm (vpv,ipv,delta)
duty_init=0.1; duty_min=0; duty_max=0.85;

persistent Vold Pold duty_old;

if isempty(Vold)
    Vold=0;     Pold=0;     duty_old= duty_init;
    
end

P=vpv*ipv;
dV=vpv-Vold;
dP=P-Pold;

if dP~=0 && vpv>30
    if dP< 0
        if dV < 0
            duty = duty_old - delta;
        else
            duty=duty_old + delta;
        end
    else
        if dV<0
            duty =duty_old + delta;
        else
            duty = duty_old - delta ;
        end
    end
else
    duty = duty_old;
    
end

if duty>= duty_max
    duty=duty_max;
elseif duty<duty_min
    duty = duty_min
    
end

duty_old= duty;
Vold= vpv;
Pold=P;

Answer 1

Hello,

There are several examples of C-Script-based MPPT algorithms in the PLECS demo model library already. See the "Single-Phase PV Inverter with Partial Shading" model, for example.

Best regards,

Kris