Sir, I tested it today and found that "the solution error was not caused by the dot in the initial value mentioned yesterday", but that after I set the initial values of capacitance and inductance, the state space equation could not be obtained normally using the SystemModelLinearize command. How can we solve it?

My code:

spacemodel = SystemModelLinearize["Model2", 
   Method -> {"SymbolicDerivative", 
       "SymbolicParameters" -> {"r", "l", "c", "k1", "k2"}}]

Then attach my circuit in the attachments.

Attachments:

Model2.mo

Thank you very much! Your answer gave me inspiration. Now I have another small problem, the questions are as follows:

I use initvalueil and initvaluevc in the code to obtain the values of inductor1.i and capacitor1.v, but the initvalueil value contains a dot, which causes me to be unable to operate correctly in the subsequent code. Could you tell me how this dot comes from and how can I eliminate this dot?

My code:

model = SystemModel["Model2"];
init = model[{"InitialValues", {"inductor1.i", "capacitor1.v"}}]
initvalueil = init[[1, 2]]
initvaluevc = init[[2, 2]]

Attachments:

Model2.mo