# How to write a matlab code to find the MTTF and MTTR in power systems, for ieee 24 bus system?

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I have to write a matlab code using matpower, which finds the mean time to failure and mean time to repair of a component in power system. I have to do this for 24 bus system.
Thank you

### 回答（1 个）

Nithin Kumar 2023-8-30

Hi Myrto,
I understand that you would like to write a MATLAB code to find the MTTF and MTTR in Power Systems for IEEE 23 bus system.
Kindly refer to the following example code to calculate MTTF and MTTR using MATPOWER:
% Load IEEE 24 Bus System data
% Define failure rates and repair rates (example values)
bus_failure_rates = [0.001, 0.002, 0.003, ...];
branch_failure_rates = [0.0005, 0.001, 0.001, ...];
repair_rates = [0.01, 0.02, 0.03, ...];
% Modify bus data to include failure rates
for i = 1:length(mpc.bus)
mpc.bus(i, 16) = bus_failure_rates(i);
end
% Create branch data matrix with failure rates
branch_data_with_rates = zeros(size(mpc.branch, 1), size(mpc.branch, 2) + 1);
branch_data_with_rates(:, 1:end-1) = mpc.branch;
branch_data_with_rates(:, end) = branch_failure_rates;
% Create a MATPOWER case with failure rates
mpc_with_rates = mpc;
mpc_with_rates.branch = branch_data_with_rates;
% Set up outage scenario
outage_scenario = struct('type', 'outage', 'rate_a', 8760, 'duration', 1);
% Run MATPOWER's contingency analysis
results = runpf(mpc_with_rates, 'pf.dc', 'outages', outage_scenario);
% Calculate MTTF (mean time to failure) and MTTR (mean time to repair)
MTTF = 1 / sum(branch_failure_rates) * results.f;
MTTR = 1 / sum(repair_rates);
fprintf('MTTF: %.2f hours\n', MTTF);
fprintf('MTTR: %.2f hours\n', MTTR);
Kindly replace the failure rates, repair rates of this example with your actual data for the calculation of MTTF and MTTR values.
I hope this answer helps you.

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