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> Guess Simscape or Modelica is more useful. For electric circuit or powe electronics I would prefer som kind of circuit simulator, they are always called spice for some reason. These are different since you do not have to the math yourself.
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that reason is it's an acronym:
SPICE = Simulation Program with Integrated Circuit Emphasis (
https://en.wikipedia.org/wiki/SPICE)
And no, Octave does not currently have a working Simulink / block-based system simulator equivalent.