how to get variable output from pv array when variable 1000 irradiance and temperature is given

I have fed 1000 irradiance and 1000 temperature.mat files to pv array but it is providing constant 2080 Volts output. I have generated the datas by writing script. I require variable output as the input varies gradually as like the temperature and irradiance to the solar panel is varying whole day. Kindly help me to solve the issue. Just I am begginer in matlab.

[dpb]

Show the code you've tried...insufficient information on what the content of 1000 .mat files would be. That would be a very difficult way to store the data if it's a separate file for each observation; it should be one file containing all the data...

[vani]

clear all
Iscs=7.84;    %% Short Circuit Current at panel name plate details
Imps=7.35;    %% Maximum Current from panel name plate details
Vocs=36.3;    %% Open Circuit Voltage at panel name plate details
clear all
Iscs=7.84;    %% Short Circuit Current at panel name plate details
Imps=7.35;    %% Maximum Current from panel name plate details
Vocs=36.3;    %% Open Circuit Voltage at panel name plate details
Vmps=29;      %% Maximum Voltage from panel name plate details
alpha=0.102;  %% Current Temperature coefficient from manufacturer
beta=-0.36099;%% Voltage Temperature coefficent from manufacturer
Gs=1000;      %% Standard Irradiance 1000 W/m2
Ts=25;        %% Standard Temperature 25 degree
for i=1:1000
    Tmin=15;
    Tmax=35;
    T=(Tmax-Tmin)*rand+Tmin; %% Temperature
    Gmin=0;
    Gmax=1000;
    G=(Gmax-Gmin)*rand+Gmin; %% Irradiance
    t=0:1:1000;
    IMP(i)=Imps*(G/Gs)*(1+(alpha*(T-Ts))); %% Maximum Current of the given irradiance & temperature
    VMP(i)=Vmps+(beta*(T-Ts)); %%Maximum Voltage of given temperature & irradiance
    PMP(i)=VMP(i)*IMP(i);
    GT(i,:)=[G,T];
    tG(i,:)=[t(i),G];
    tT(i,:)=[t(i),T];
    V(i,1)=VMP(i);
    Output(i,1)=IMP(i);
    Output(i,1)=PMP(i);
end

Vmps=29;      %% Maximum Voltage from panel name plate details
alpha=0.102;  %% Current Temperature coefficient from manufacturer
beta=-0.36099;%% Voltage Temperature coefficent from manufacturer
Gs=1000;      %% Standard Irradiance 1000 W/m2
Ts=25;        %% Standard Temperature 25 degree


for i=1:1000
    Tmin=15;
    Tmax=35;
    T(i)=(Tmax-Tmin)*rand+Tmin; %% Temperature
    Gmin=0;
    Gmax=1000;
    G(i)=(Gmax-Gmin)*rand+Gmin; %% Irradiance
    t=(0:999);
    IMP(i)=Imps*(G/Gs)*(1+(alpha*(T-Ts))); %% Maximum Current of the given irradiance & temperature
    VMP(i)=Vmps+(beta*(T-Ts)); %%Maximum Voltage of given temperature & irradiance
    PMP(i)=VMP(i)*IMP(i);
    GT(i,:)=[G,T];
    G(i,:)=G(1:i);
    T(i,:)=T(i,:);
    tG(i,:)=[t(i),G(i)];
    tT(i,:)=[t(i),T(i)];
    V(i,1)=VMP(i);
    Output(i,1)=IMP(i);
    Output(i,1)=PMP(i);
end

using this code i have generated the Irradiance and temperature.panel is taking the multiple input but providing the constant ouput for all G & T values

Answer 1

[dpb]

% Get rid of duplicated code -- dpb

% clear all
% Iscs=7.84;    %% Short Circuit Current at panel name plate details
% Imps=7.35;    %% Maximum Current from panel name plate details
% Vocs=36.3;    %% Open Circuit Voltage at panel name plate details
% clear all

Iscs=7.84;    %% Short Circuit Current at panel name plate details
Imps=7.35;    %% Maximum Current from panel name plate details
Vocs=36.3;    %% Open Circuit Voltage at panel name plate details
Vmps=29;      %% Maximum Voltage from panel name plate details
alpha=0.102;  %% Current Temperature coefficient from manufacturer
beta=-0.36099;%% Voltage Temperature coefficent from manufacturer
Gs=1000;      %% Standard Irradiance 1000 W/m2
Ts=25;        %% Standard Temperature 25 degree

% move constants outside loop -- dpb
Tmin=15;
Tmax=35;
Gmin=0;
Gmax=1000;
t=0:1:1000;
% create repeatable results for debugging -- remove/comment out for production
rng('default')
for i=1:1000
    T=(Tmax-Tmin)*rand+Tmin;                %% Temperature
    G=(Gmax-Gmin)*rand+Gmin;                %% Irradiance
    IMP(i)=Imps*(G/Gs)*(1+(alpha*(T-Ts)));  %% Maximum Current of the given irradiance & temperature
    VMP(i)=Vmps+(beta*(T-Ts));              %%Maximum Voltage of given temperature & irradiance
    PMP(i)=VMP(i)*IMP(i);
    GT(i,:)=[G,T];
    tG(i,:)=[t(i),G];
    tT(i,:)=[t(i),T];
    V(i,1)=VMP(i);
    Output(i,1)=IMP(i);
    %Output(i,1)=PMP(i);                     % used same location for PMP(i) as IMP(i) in Output array
    Output(i,2)=PMP(i);
end
[GT(1:5,:); GT(end-4:end,:)]                % look at G,T beginning, end

ans = 10×2

905.7919 31.2945 913.3759 17.5397 97.5404 27.6472 546.8815 20.5700 964.8885 34.1501 796.6247 27.4561 125.5362 29.9175 25.1505 31.4479 731.4075 23.2886 367.2859 30.6275

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[Output(1:5,:); Output(end-4:end,:)]        % look at output beginning, end

ans = 10×2

10.9320 292.1871 1.6048 50.8623 0.9105 25.5344 2.2033 67.4185 13.7109 352.3283 7.3220 205.8468 1.3855 37.7200 0.3064 8.1733 4.4374 131.4264 4.2491 114.5921

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The G,T and Output arrays don't appear to be constant at all...you would have had the same result in both columns the Output array as it was, however, as noted in comments above.

Let's plot with time...

try
plot(t,GT)
catch
lasterr
plot(t(1:end-1),GT)
end

ans = 
    'Error using plot
     Specify the coordinates as vectors or matrices of the same size, or as a vector and a matrix that share the same length in at least one dimension.'

Ooops! What went wrong is that the t vector was defined from 0:1000 which contains 1001 elements, but you ran the loop over only 1000 so the output arrays are short one value

We can see this by --

whos t tG tT Output

  Name           Size              Bytes  Class     Attributes

  Output      1000x2               16000  double              
  t              1x1001             8008  double              
  tG          1000x2               16000  double              
  tT          1000x2               16000  double              

The above can be fixed by running the loop over

for i=1:numel(t)
  ...
end

instead so if you change your mind on t, nothing else matters.

The above code could also be written using MATLAB array syntax without the loop and there's no need to store the compound variable arrays...

Iscs=7.84;    %% Short Circuit Current at panel name plate details
Imps=7.35;    %% Maximum Current from panel name plate details
Vocs=36.3;    %% Open Circuit Voltage at panel name plate details
Vmps=29;      %% Maximum Voltage from panel name plate details
alpha=0.102;  %% Current Temperature coefficient from manufacturer
beta=-0.36099;%% Voltage Temperature coefficent from manufacturer
Gs=1000;      %% Standard Irradiance 1000 W/m2
Ts=25;        %% Standard Temperature 25 degree

% move constants outside loop -- dpb
Tmin=15;
Tmax=35;
Gmin=0;
Gmax=1000;
t=0:1:1000;
% create repeatable results for debugging -- remove/comment out for production
rng('default')
RAND=rand(2,numel(t)).';        % create 2xN random array so can match sequentially-generated pattern
T=(Tmax-Tmin)*RAND(:,1)+Tmin;   % random Temperature over t
G=(Gmax-Gmin)*RAND(:,2)+Gmin;   % ditto Irradiance
IMP=Imps*(G/Gs).*(1+(alpha*(T-Ts))); % Maximum Current of the given irradiance & temperature
VMP=Vmps+(beta*(T-Ts));             % Maximum Voltage of given temperature & irradiance used final V
PMP=VMP.*IMP;                       % power -- note the "dot" operator .* to do elementwise multiply
Output1=[IMP PMP];                   % create the output array if want/need...
whos Output Output1

  Name            Size            Bytes  Class     Attributes

  Output       1000x2             16000  double              
  Output1      1001x2             16016  double              

all(Output==Output1(1:1000,:))

ans = 1x2 logical array
   1   1

And we can confirm the results are identical to the previous code...