Load flow cannot initialize machines

Alvaro Albertini

2019 4 20

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Hello,

I am having trouble to automatically initialize the results of the powergui Load Flow calculations as initial conditions of the machines in my model. In my simulink model, the Load Flow tool is able to Update and Compute. The Load Flow calculation will converge, but as I click "Apply to Model" I receive a warning which states:

"The Load Flow tool cannot set automatically the initial condition of the signal connected to the Pm input of the Synchronous Generator block."

I organized my machines inside simple masks. Ther powergui is located in the upper level of the model.

I would like to solve this warnings, so my model can be updated automatically with the Load Flow calculations. Dows anyone knows how can I solve this issue?

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FAISAL JAMSHEED 2021-10-27

You have asked this question 2 years ago, I am facing the same problem now.

Have you found the answer about it?

If yes can you please share it?

Alvaro Albertini 2021-10-28

Hello Faisal,

Yesterday when I received your message I spent some hours trying to figure out what how I solved this issue, but unfortunately I could not remember exactly how I did it. This was part of my Master Thesis, which I delivered some years ago, and ever since not searched these files.

From what I see now, I think some of the following tips might be of help:

1) Check out if you can build callback functions to initialize your model and add them as PreLoadFcn* on the 'Model Properties' area;

2) If possible, try to avoid the Simscape physical models (from Power Systems > Simscape Componentes). I have better experiences using the powerlib>Machines models, which can be found in Power Systems > Specialized Technology libraries. You will find machines there in the Fundamental Blocks area.

I hopw you can solve your issue.

All the best!

Alvaro

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