To simulate Inductor you need use S-Param simulation... You can find expressions for L and Q in terms of S11,S12,etc. Similarly you can make sweep on voltage applied to a varactor, and plot imag(Y11), which is the capacitance...
You need simulate Y(1,2) for series inductor or varactor ,if varactor shunt then you need Y(1,1),for inductor L=imag(-1/Y(1,2))/2/pi/freq (Henry) Q=imag(-Y(1,2))/real(Y(1,2)) ,for var C=imag(-Y(1,2))/2/pi/freq Q=imag(Y(1,2))/real(Y(1,2))
PSS is very slow, if there are a lot of sweep points.
I like to invoke the sweep tool, run tran simulations and extract a frequency estimation by using freq function.
You might find it better to use parametric analysis, with a
transient simulation lasting some number of cycles and the
frequency calculated from the last two zero-crossings. A
sweep with Vtune moving quickly relative to cycle frequency
may be inaccurate at any given Vtune point, and a slow
Vtune with a lot ov cycles is an unberable solution time.
You probably do not need great Vtune granularity for most
uses, and certainly not "continuous" variation.