use S-functions block

Hi Amir,

If your power system model in Simulink is constructed using only the Basic Blocks, then I'm unsure if the Jacobian can be computed using S-Function.

Computing the Jacobian matrix of a function requires a mathematical model. Since MATLAB is good for handling mathematical expressions, it is advisable to compute the Jacobian in MATLAB environment and then pass the solution (using a user-defined Jacobian) to Simulink environment for evaluation.

Else, try approximating the Jacobian using the finite difference method. The following articles may be helpful in computing the Jacobian.

https://www.mathworks.com/help/symbolic/jacobian.html

https://www.mathworks.com/help/symbolic/mupad_ref/jacobian.html

https://www.mathworks.com/help/pdf_doc/symbolic/symbolic_tb.pdf

https://www.mathworks.com/help/optim/ug/lsqnonlin.html

https://www.mathworks.com/help/optim/ug/nonlinear-equations-with-jacobian.html

Thanks for your valuable suggestion.

I really appreciate it.