How to fix legend error??

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zina shadidi
zina shadidi 2021-4-29
评论： Star Strider 2021-5-1
Hi
my code is running well but I have a legend error
when I write 'legend('Curve Name')' it appears only the first one
(Warning: Ignoring extra legend entries.
> In legend>set_children_and_strings (line 646)
In legend>make_legend (line 316)
In legend (line 259)
In finalstepsolar (line 68)
Warning: Ignoring extra legend entries.
> In legend>set_children_and_strings (line 646)
In legend>make_legend (line 316)
In legend (line 259)
In finalstepsolar (line 82)
>> )
any help please
K=1.38065e-23; %Boltzman Constant
q=1.602e-19; %Electron's Charge
Iscn=3.8; %Desigerable Short Circuit Current
Vocn=21.1; % Desigerable Open Circuit Voltage
Kv=-0.073; % Temperature Voltage Constant
Ki=0.003; %Temperature Current Constant
Ns=36; %Number of Series Conected Cells
Np=6;
T=25+273; % Operating Temperature in Kelvin
Tn=30+273; %Temperature at STC
Gn=1000; %Irradiance at STC
A=3.3; %Diode Ideality Constant
%%A= [Si-mono=1.2, Si- poly =1.3, a-Si:Hi=1.8,a-Si:Hitandem=3.3,a-Si:Hitriple=5, CdTe=1.5, CIS=1.5, AsGa=1.3 ]
a=(Ns*A*K*Tn)/q;
Eg=1.2; %Band Gap of silicon at Temperature of STC condition [ 25 deg. Cel]
G=1000; %Actual Irradiance
Rs=0.221; %Series Resistance of Equivalent PV cell
Rp=415.405; %Parallel Resistance of Equivalent PV cell
%%%%%%%%%%%%%%% Parameter's Value Calculation %%%%%%%%%%%%%%%%%
Tn2=80+273;
for Tni=Tn:5:Tn2
Vtn=Ns*((K*Tn)/q); % Equation 2
I0n=Iscn/((exp(Vocn/(a*Vtn)))-1); % Equation 5
I0=I0n*((Tni/T)^3)*exp(((q*Eg/(a*K))*((1/Tni)-(1/T)))); %Equation 4
Ipvn=Iscn;
Ipv=(G/Gn)*(Ipvn+Ki*(T-Tni)); %Equation 3
Vt=Ns*((K*T)/q);
i=1;
I(1)=0;
for (V=Vocn: -0.1:0)
I_term1=I0*(exp((V+I(i)*Rs)/(Vt*a))-1)*Np; %Part of Equation 1
I_term2= (V+I(i)*Rs)/Rp; % Part of Equation 1
I(i+1)=Ipv-(I_term1+I_term2); %Equation 1
%%%%Ipv(i)=(G/Gn)*(Ipvn+Ki*(T-Tni));
if I(i)>0 % Negative Power and Current Control Loop
I(i)=I(i);
else
I(i)=0;
end
Pi(i)=V*I(i);
Vi(i)=V;
i=i+1;
end
%%%%%%%%%%%% Graphical Interface %%%%%%%%%%%%%%%%%%%
figure
hold on;
plot(Vi(1:i-1),I(1:i-1),'b', 'Linewidth',1.5)
xlabel('Voltage (volt)');
ylabel('Current (Amp)');
legend('T=30 C','T=35 C','T=40 C','T=45 C','T=50 C','T=55 C','T=60 C','T=65 C','T=70 C','T=75 C','T=80 C')
idxmax = find(Pi == max(Pi));
figure
plot(Vi(1:i-1),Pi(1:i-1), '-p','MarkerIndices',[ idxmax],...
'MarkerFaceColor','red',...
'MarkerSize',8)
xlabel('Voltage (volt)');
ylabel('Power (Watt)');
legend('T=30 C','T=35 C','T=40 C','T=45 C','T=50 C','T=55 C','T=60 C','T=65 C','T=70 C','T=75 C','T=80 C')
end
  4 个评论
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zina shadidi
zina shadidi 2021-4-30
Thanks alot Jan and thank you Raymond. It is very nice of you to Replay
But my probem still exist.

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Star Strider
Star Strider 2021-4-30
Ran in:
Try this —
K=1.38065e-23; %Boltzman Constant
q=1.602e-19; %Electron's Charge
Iscn=3.8; %Desigerable Short Circuit Current
Vocn=21.1; % Desigerable Open Circuit Voltage
Kv=-0.073; % Temperature Voltage Constant
Ki=0.003; %Temperature Current Constant
Ns=36; %Number of Series Conected Cells
Np=6;
T=25+273; % Operating Temperature in Kelvin
Tn=30+273; %Temperature at STC
Gn=1000; %Irradiance at STC
A=3.3; %Diode Ideality Constant
%%A= [Si-mono=1.2, Si- poly =1.3, a-Si:Hi=1.8,a-Si:Hitandem=3.3,a-Si:Hitriple=5, CdTe=1.5, CIS=1.5, AsGa=1.3 ]
a=(Ns*A*K*Tn)/q;
Eg=1.2; %Band Gap of silicon at Temperature of STC condition [ 25 deg. Cel]
G=1000; %Actual Irradiance
Rs=0.221; %Series Resistance of Equivalent PV cell
Rp=415.405; %Parallel Resistance of Equivalent PV cell
%%%%%%%%%%%%%%% Parameter's Value Calculation %%%%%%%%%%%%%%%%%
Tn2=80+273;
Dname1 = {'T=30 C','T=35 C','T=40 C','T=45 C','T=50 C','T=55 C','T=60 C','T=65 C','T=70 C','T=75 C','T=80 C'};
figure
hold on
k1 = 0;
for Tni=Tn:5:Tn2
k1 = k1+1;
Vtn=Ns*((K*Tn)/q); % Equation 2
I0n=Iscn/((exp(Vocn/(a*Vtn)))-1); % Equation 5
I0=I0n*((Tni/T)^3)*exp(((q*Eg/(a*K))*((1/Tni)-(1/T)))); %Equation 4
Ipvn=Iscn;
Ipv=(G/Gn)*(Ipvn+Ki*(T-Tni)); %Equation 3
Vt=Ns*((K*T)/q);
i=1;
I(1)=0;
for (V=Vocn: -0.1:0)
I_term1=I0*(exp((V+I(i)*Rs)/(Vt*a))-1)*Np; %Part of Equation 1
I_term2= (V+I(i)*Rs)/Rp; % Part of Equation 1
I(i+1)=Ipv-(I_term1+I_term2); %Equation 1
%%%%Ipv(i)=(G/Gn)*(Ipvn+Ki*(T-Tni));
if I(i)>0 % Negative Power and Current Control Loop
I(i)=I(i);
else
I(i)=0;
end
Pi(i)=V*I(i);
Vi(i)=V;
i=i+1;
end
%%%%%%%%%%%% Graphical Interface %%%%%%%%%%%%%%%%%%%
% figure
subplot(2,2,1)
hold on
plot(Vi(1:i-1),I(1:i-1),'b', 'Linewidth',1.5, 'DisplayName',Dname1{k1})
xlabel('Voltage (volt)');
ylabel('Current (Amp)');
% legend('T=30 C','T=35 C','T=40 C','T=45 C','T=50 C','T=55 C','T=60 C','T=65 C','T=70 C','T=75 C','T=80 C')
idxmax = find(Pi == max(Pi));
% figure
subplot(2,2,2)
hold on
plot(Vi(1:i-1),Pi(1:i-1), '-p','MarkerIndices',[ idxmax],...
'MarkerFaceColor','red',...
'MarkerSize',8, 'DisplayName',Dname1{k1})
xlabel('Voltage (volt)');
ylabel('Power (Watt)');
hl = legend;
end
hold off
subplot(2,2,[3 4])
Ax = gca;
Ax.Visible = 'off';
pos = Ax.Position
pos = 1×4
0.1300 0.1100 0.7750 0.3412
hl.NumColumns = 3;
hl.Position = pos;
I added the ‘k1’ counter and changed the order of the figure and hold calls, and changed the legend call to include 'DisplayName' strings.
This should get you closer to the result you want.
  2 个评论
zina shadidi
zina shadidi 2021-5-1
thank you Star Strider , its working and I like the new figure.
Star Strider
Star Strider 2021-5-1
As always, my pleasure!
Thank you!

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