Help regarding Lambad iteration - Simple Question

Question

Hrishikesh Dalal on 28 Oct 2019

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https://se.mathworks.com/matlabcentral/answers/487813-help-regarding-lambad-iteration-simple-question

Answered: Vimal Rathod on 31 Oct 2019

UnitCommitmentAvg-Test.zip

Here is a code where in i am doing Lambda Iteration to find economic dispatch. I am not very good with arrays. All i want to do is log the values of lambda for each load (length of load = 1152) so i should have 1152 lambda values. Attachimg whole code as well.

for i=1:1:length(Load)

%step 1 initial value

lambda=(Alpha(1)*(Load(i,1)/2))+Beta(1);

last_lambda = lambda;

vector_lab = [vector_lab lambda];

while e>error

lambda2 = lambda-Beta;

Therta=diag(Alpha);

Powers = inv(Therta)*lambda2';

% P = Powers.*Cm';

% P = max(P,Gmax);

% P = min(P,Gmin);

PL = 0

last_power = total_power;

total_power = sum(Powers);

total_demand_loss = PL + Load;

e=abs(total_power(i)'-total_demand_loss(i));

if (length(vector_lab)<2)

lambda(i)=lambda*increase;

else

lambda=lambda + ((lambda-last_lambda)./(total_power-last_power)).*(total_demand_loss-total_power);

end

vector_lab = [vector_lab lambda(i)];

if (length(vector_lab)>1)

last_lambda = vector_lab(length(vector_lab)-1);

end

%% Powers

P_C11=(lambda-1.31)/(2*0.028);

P_C12=(lambda-1.31)/(2*0.028);

P_C13=(lambda-1.55)/(2*0.036);

P_C14=(lambda-1.31)/(2*0.028);

P_C15=(lambda-1.31)/(2*0.028);

%Bio Unit 1's

P_B11=(lambda-1.10)/(2*0.048);

P_B12=(lambda-1.10)/(2*0.048);

P_B13=(lambda-1.10)/(2*0.048);

P_B14=(lambda-1.10)/(2*0.048);

P_B15=(lambda-1.10)/(2*0.048);

%Coal Unit 2's

P_C21=(lambda-1.55)/(2*0.036);

P_C22=(lambda-1.55)/(2*0.036);

P_C23=(lambda-1.55)/(2*0.036);

P_C24=(lambda-1.55)/(2*0.036);

P_C25=(lambda-1.55)/(2*0.036);

%Nuclear Unit 2

P_N2=(lambda-2.4)/(2*0.028);

% Bio Gas Unit 2's

P_B21=(lambda-1.25)/(2*0.056);

P_B22=(lambda-1.25)/(2*0.056);

P_B23=(lambda-1.25)/(2*0.056);

P_B24=(lambda-1.25)/(2*0.056);

P_B25=(lambda-1.25)/(2*0.056);

%Hydro Unit 2

P_H2=(lambda-1)/(2*0.04);

%Gas Unit 2

P_G21=(lambda-1.8)/(2*0.08);

P_G22=(lambda-1.8)/(2*0.08);

P_G23=(lambda-1.8)/(2*0.08);

P_G24=(lambda-1.8)/(2*0.08);

P_G25=(lambda-1.8)/(2*0.08);

P_G26=(lambda-1.8)/(2*0.08);

P_G27=(lambda-1.8)/(2*0.08);

P_G28=(lambda-1.8)/(2*0.08);

P_G29=(lambda-1.8)/(2*0.08);

P_G210=(lambda-1.8)/(2*0.08);

%Nuclear Unit 1

P_N1=(lambda-2)/(2*0.035);

%Hydro Unit 1

P_H1=(lambda-1.2)/(2*0.05);

%Gas Unit 1

P_G11=(lambda-2.7)/(2*0.075);

P_G12=(lambda-2.7)/(2*0.075);

P_G13=(lambda-2.7)/(2*0.075);

P_G14=(lambda-2.7)/(2*0.075);

P_G15=(lambda-2.7)/(2*0.075);

P_G16=(lambda-2.7)/(2*0.075);

P_G17=(lambda-2.7)/(2*0.075);

P_G18=(lambda-2.7)/(2*0.075);

P_G19=(lambda-2.7)/(2*0.075);

P_G110=(lambda-2.7)/(2*0.075);

Pm = [P_C11,P_C12,P_C13,P_C14,P_C15,P_B11,P_B12,P_B13,P_B14,P_B15,P_C21,P_C22,P_C23,P_C24,P_C25,P_N2,P_B21,P_B22,P_B23,P_B24,P_B25,P_H2,P_G21,P_G22,P_G23,P_G24,P_G25,P_G26,P_G27,P_G28,P_G29,P_G210,P_N1,P_H1,P_G11,P_G12,P_G13,P_G14,P_G15,P_G16,P_G17,P_G18,P_G19,P_G110];

P=Pm.*Cm;

end