How to get a continuous load output of 7 days in one graph using loops

Question

Afnan Rahman 2020-7-27

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https://ww2.mathworks.cn/matlabcentral/answers/570949-how-to-get-a-continuous-load-output-of-7-days-in-one-graph-using-loops

回答： Maria 2020-7-29

Hi,

I am curently facing difficulty regarding generating a graph from a loop.

I am working on the daily EV load profile and have already got the daily load required for a day. I also got the output graph. However, this is for 24 hours. I want to get an output for 7 days. I used my previous loop(for daily load) in another loop to get it for 7 days or 168 hours, but I only got it as separtae graphs. I wanted it to show a continous output for 7 days straight. I tried changing the interval from 1440 minutes to 10080 minutes, but the loop takes the whole interval time and prvides a similar graph as the daily load output.

I want an output like the picture provided:

for day=1:7
    
i = 1;
distance_b = zeros(samples,1);
SOC_arrival_work_b = zeros(samples,1);
SOC_arrival_home_b = zeros(samples,1);
chargingstart_b = zeros(samples,1);
chargingstart_minute_b = zeros(samples,1);
charging_energy_b = zeros(samples,1);
duration_charge_b = zeros(samples,1);
intervals_charge_b = zeros(samples,1);
power_matrix_b = zeros(intervals,samples);
while i <= samples
    
    % Randomly sample a driving distance from lognormal PDF
    repeat_distance = 1;
    while repeat_distance == 1
        distance_b(i) = lognrnd(mu_d,sigma_d);
        
        % Ensure it lies within range of upper bound from distance data
        if distance_b(i) < range_UK(end)
            repeat_distance = 0;
        end
    end
    
    % Use distance to calculate SOC at arrival to work
    SOC_arrival_work_b(i) = 1 - (distance_b(i)/max_range);
    
    % Use same distance to calculate SOC at arrival home
    SOC_arrival_home_b(i) = SOC_arrival_work_b(i) - (distance_b(i)/max_range);
    % Randomly sample home arrival time/initial charging time from normal PDF
    repeat_time = 1;
    while repeat_time == 1
        chargingstart_b(i) = normrnd(mu_chargingstart_b,sigma_chargingstart_b);
        
        % Fix time after 24
        if chargingstart_b(i) >= 0 && chargingstart_b(i) < 24
            repeat_time = 0;
        end
        
        % Convert charging time to minute of day, [0 1440] minutes
        % rounding if necessary
        chargingstart_minute_b(i) = round((chargingstart_b(i)*(intervals/24)),0);
    end
    
    % Use sampled initial SOC from driving distance to determine required
    % charging energy (kWh) to reach a full charge
    charging_energy_b(i) = (cap*(1 - SOC_arrival_home_b(i)))/conversion_factor;
    % Use required charging energy with charging power to determine required
    % charging duration to reach a full charge (hour)
    duration_charge_b(i) = charging_energy_b(i)/charging_power;
     
    % Convert hours to full charge to minutes, and round
    intervals_charge_b(i) = round((duration_charge_b(i)*(intervals/24)),0);
    
    % Add charging power of each minute for each EV
    if chargingstart_minute_b(i)+intervals_charge_b(i) > intervals
        power_matrix_b(chargingstart_minute_b(i):end,i) = charging_power;
        power_matrix_b(1:(chargingstart_minute_b(i)+intervals_charge_b(i)-intervals),i) = charging_power;
    else
        power_matrix_b(chargingstart_minute_b(i):chargingstart_minute_b(i)+intervals_charge_b(i),i) ...
        = charging_power;
    end 
    % Repeat loop for number of samples desired
    i = i + 1;
end    
% Total power for each minute
figure()
power_kw_b = sum(power_matrix_b,2);
power_Mw_b = power_kw_b/1000;
x(day)= plot(1:intervals,power_Mw_b)
xlabel('Time (minute)')
ylabel('Cumulative Load (MW)')
title(['Cumulative Load Over A Day in MW, ' num2str(samples) ' EVs'])
xlim([0 intervals])
hold on
end
hold off

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Answer 1

Maria 2020-7-29

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/570949-how-to-get-a-continuous-load-output-of-7-days-in-one-graph-using-loops#answer_472348

The easiest way wold be to just calculate the required load for the total of 7 days and store that data in one array. Then plot the whole week on one figure and edit the figure to add vertical axis to separate each day. It is similar to what you are doing now, but see that instead of plotting the data of each day, you need to plot the data of the 7 days altogether, so take the plotting function out of the 7 day loop and store the values of power_Mw_b for the whole week on one array. Hope this helps!

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