Eaglesea,
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This is probably not much of an answer yet to your questions.
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LTspice has a lot of trouble.? Sometimes I had "timestep too small" aborts, but mostly I see math errors where it displays values such as "1.#QNAN" or "1.#IND" volts or amps.? Those are math error codes meaning "Not a Number" or "Indefinite/Indeterminate".? That is not a good sign.? Also there was a lot of Trap Ringing, for what it's worth (which is not much).
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I wonder if it works having a constant power load with a time-varying sinusoidal waveform.? It needs to be very nonlinear, and I think the interaction between that nonlinearity and the series impedance causes havoc.
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Does that load mimic anything real?
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Just an FYI - inductance is mostly a function of the loop area enclosed by the wires.? There is a misconception that inductance depends entirely on the wires themselves.? You can find formulas for wire self inductance, but they are often mis-applied.
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Andy
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