The perturb and observe (P&O) method tracks the maximum power point (MPP) by repeatedly increasing or decreasing the output voltage at the MPP of the Photovoltaic. The implementation of the method is relatively simple, but it cannot track the MPP when the irradiance varies quickly with time. In addition, it may cause system oscillation

around the peak power points due to the effect of measurement noise.

The perturb and observe (P&O) method tracks the maximum power point (MPP) by repeatedly increasing or decreasing the output voltage at the MPP of the Photovoltaic. The implementation of the method is relatively simple, but it cannot track the MPP when the irradiance varies quickly with time. In addition, it may cause system oscillation

around the peak power points due to the effect of measurement noise.

Give me the details of your total output. Which DC-DC Converter is chosen for your application? . I am having the P& O Algorithm. If you want to know i will give some details regards that.

Please find P&O code in the appendix of this paper:

https://www.researchgate.net/publication/301912126_Proposal_and_implementation_of_a_novel_perturb_and_observe_algorithm_using_embedded_software

Also you can find the data of this paper :

https://www.researchgate.net/publication/313368387_MPPT_in_PSIM_Software

Conference Paper Proposal and implementation of a novel perturb and observe a...

The algorithm is very simple to understand. Just go through the algorithm and write the program in MATLAB embedded function and call that function in simulink model.

function [Voltage,Power_P,Power,Freq,Duty,Count]= fcn(Power_Prev, ... SV_Prev,Solar_V,Current,O_Freq,Change,Duty_I,T) Power = Solar_V * Current; Duty = Duty_I; Freq = O_Freq; Count = T + 1; rate = 0.001; Power_P = Power_Prev; Voltage = SV_Prev; if Count == 1e4 %*************************MPPT********************** if abs(1-Power/Power_Prev) 0.1 && Duty < 0.95) if Power>Power_Prev if Solar_V>SV_Prev Duty = Duty - Change; else Duty = Duty + Change; end else if Solar_V>SV_Prev Duty = Duty + Change; else Duty = Duty - Change; end end else Duty = .7; end Power_P = Power; Voltage = Solar_V; end Count = 0; %***********************END MPPT********************** end end

https://www.youtube.com/watch?v=NsJTi6A7rwE

P&O PV MPPT is simple and very useful algorithm of MATLAB simulink.

function D = PandO(Param, Enabled, V, I)

% MPPT controller based on the Perturb & Observe algorithm.

% D output = Duty cycle of the boost converter (value between 0 and 1)

%

% Enabled input = 1 to enable the MPPT controller

% V input = PV array terminal voltage (V)

% I input = PV array current (A)

%

% Param input:

Dinit = Param(1); %Initial value for D output

Dmax = Param(2); %Maximum value for D

Dmin = Param(3); %Minimum value for D

deltaD = Param(4); %Increment value used to increase/decrease the duty cycle D

% ( increasing D = decreasing Vref )

%

persistent Vold Pold Dold;

dataType = 'double';

if isempty(Vold)

Vold=0;

Pold=0;

Dold=Dinit;

end

P= V*I;

dV= V - Vold;

dP= P - Pold;

if dP ~= 0 & Enabled ~=0

if dP < 0

if dV < 0

D = Dold - deltaD;

else

D = Dold + deltaD;

end

else

if dV < 0

D = Dold + deltaD;

else

D = Dold - deltaD;

end

end

else D=Dold;

end

if D >= Dmax | D