71 lines
2.1 KiB
Matlab
71 lines
2.1 KiB
Matlab
%% parameters setting
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% System Redundancy (SR)
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lambdaB_SR = 11.76e-6;% hours^(-1)
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lambdaR_SR = 16.6e-6;
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muB_SR = 0.5;% hours^(-1)
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muR_SR = muB_SR;
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% Component Redundancy (CR)
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lambdaB_CR = 17*lambdaB_SR;
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lambdaR_CR = 17*lambdaR_SR;
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muB_CR = 0.5;% hours^(-1)
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muR_CR = muR_SR;
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ModulePower = 10;% kW
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minLoad = 40;% kW
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loadStep = 20;% kW
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%% start evaluation
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numberOfEvaluations = 6;
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MTTF_perc_impr = zeros(numberOfEvaluations,1);
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MTBF_perc_impr = zeros(numberOfEvaluations,1);
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MTBF_SR = zeros(numberOfEvaluations,1);
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MTBF_CR = zeros(numberOfEvaluations,1);
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Energy_perc_impr = zeros(numberOfEvaluations,1);
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for i = 1 : numberOfEvaluations
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Load = minLoad + i*loadStep;% kW, typical values from 50 to 100 kW
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n = ceil(Load/ModulePower);
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nm = n+3;% nm is n+m
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PotTransformerMonolite=0.04*2*Load;
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PotTransformerModular=0.04*Load;
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Energy_perc_impr(i) = 100; % estimate based only on transformers' consumption
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[A_SR,MTTF_SR,MTBF_SR_value] = evaluate_SR(nm,n,lambdaB_SR,lambdaR_SR,muB_SR,muR_SR);
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[A_CR,MTTF_CR,MTBF_CR_value] = evaluate_CR(nm,n,lambdaB_CR,lambdaR_CR,muB_CR,muR_CR);
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MTBF_SR(i) = MTBF_SR_value;
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MTBF_CR(i) = MTBF_CR_value;
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A_perc_impr = 100*(A_CR-A_SR)/A_SR;
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MTTF_perc_impr(i) = 100*(MTTF_CR-MTTF_SR)/MTTF_SR;
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MTBF_perc_impr(i) = 100*(MTBF_CR_value-MTBF_SR_value)/MTBF_SR_value;
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end
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%% Plot
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x = minLoad : loadStep : (minLoad+(numberOfEvaluations-1)*loadStep);
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zeroline=zeros(1,length(x));
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fs = 14;
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f1=figure(1);
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f1.Position = [50 50 650 650];
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title('Percentage of improvement','FontSize',fs-2);
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hold on;
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xlabel('DC load [kW]','FontWeight','bold','FontSize',fs);
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plot(x,MTBF_perc_impr,'Color',[0,0,0],'LineWidth',2);
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plot(x,zeroline,'Color',[0.4,0.4,0.4]);
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f2=figure(2);
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f2.Position = [50 50 650 650];
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title('Mean Time Between two Failures (MTBF)','FontSize',fs-2);
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hold on;
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xlabel('DC load [kW]','FontWeight','bold','FontSize',fs);
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ylabel('MTBF [hours]','FontWeight','bold','FontSize',fs);
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plot(x,MTBF_SR,"--",'Color',[0.5,0,0.5],'LineWidth',2);
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plot(x,MTBF_CR,"-.",'Color',[0,0.7,0],'LineWidth',2);
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legend('SR','CR','FontSize',fs); |