I've updated my answer showing the result with all the boolean parameter combinations.

Hello, sir! Do I need to assign values (True or False) to k1 and k2 and get different state equations? Or is it possible for Systemmodeler to identify all switch states by itself, and then give all possible state space equations (sorry, I may think too well haha).

Hello, sir! I used your method and achieved the desired effect. But (k1->True k2->True) and (k1->False k2->False) are not what I need because they do not meet the actual situation. How can I remove the state space equations for these two situations?

spacemodel = SystemModelLinearize["Model2", 
    Method -> {"SymbolicDerivative", 
        "SymbolicParameters" -> {"r", "l", "c", "k1", "k2"}}];
kVals = Thread[{QuantityVariable[
       "k1",IndependentPhysicalQuantity[""]], QuantityVariable[
       "k2",IndependentPhysicalQuantity[""]]} -> #] & /@ 
   Tuples[{{True, False}, {True, False}}];
{#, spacemodel /. #} & /@ kVals // TableForm

Attachments:

Model2.mo