How to integrate MATLAB .m file in Python script to run it in OPAL-RT Platform?

I am trying to run a simulink model which has two PVs connected with grid. The simulation will tun multiple times, the PV irradiance, temperature will be fed to each simulation through running a matlab file which will randomly select the irradiance, temparature and load values. The data will be saved after eaxh simulation. As I am relatively new using Python Script in Opal RT,can anyone suggest me how can I write the MATLAB file in the script and what would be the best way to write the code?

And ,if there is any example available like this , can you share it to me?

Answer 1

[Yash]

Hi Prithwi,

As I can understand, you have one simulink model, which will be simulated multiple times with varying parameters and the results will be saved using a MATLAB script. You somehow want to call this MATLAB script with python to run in OPAL-RT.

Code

Given below is an example of how you can write a MATLAB script:

% Define ranges for parameters
irradianceRange = [200, 1000]; % Example range in W/m^2
temperatureRange = [15, 40];   % Example range in Celsius
loadRange = [0.5, 1.5];        % Example range in kW

% Number of simulations to run
numSimulations = 10;

% Loop over the number of simulations
for i = 1:numSimulations
    % Randomly select parameter values
    irradiance = rand() * (irradianceRange(2) - irradianceRange(1)) + irradianceRange(1);
    temperature = rand() * (temperatureRange(2) - temperatureRange(1)) + temperatureRange(1);
    load = rand() * (loadRange(2) - loadRange(1)) + loadRange(1);
    
    % Set the parameters in the Simulink model
    set_param('your_model_name/PV_Irradiance', 'Value', num2str(irradiance));
    set_param('your_model_name/PV_Temperature', 'Value', num2str(temperature));
    set_param('your_model_name/Load', 'Value', num2str(load));
    
    % Run the simulation
    simOut = sim('your_model_name');
    
    % Save the results
    resultsFileName = sprintf('simulation_results_%d.mat', i);
    save(resultsFileName, 'simOut');
end

Important Notes

• Replace 'your_model_name' with the actual name of your Simulink model.
• Ensure that the block paths (e.g., 'your_model_name/PV_Irradiance') match the names in your model.
• Adjust the ranges for your parameters according to your specific requirements.
• Make sure your Simulink model is set up to accept these parameters as inputs.

Call MATLAB from Python

You can further rewrite this code as a MATLAB function and call the MATLAB function from python using MATLAB Engine API for Python. Please refer to the following documentation for more edtails: https://www.mathworks.com/help/matlab/matlab_external/call-matlab-functions-from-python.html

Integrate Python and OPAL-RT

You should check the OPAL-RT documentation on how to integrate Python and OPAL_RT. The following resources might be helpful:

• Test Automation using the Python API: https://www.opal-rt.com/opal_tutorial/more-tutorials-2-test-automation-using-the-python-api/
• Using Python Script: https://opal-rt.atlassian.net/wiki/spaces/PRD/pages/143691049/Using+Python+Script

I hope this helps!