Note that, for a source that has a Norton equivalent (current || resistance || capacitance), a series inductance increases the impedance but only around the resonant frequency; at best, at higher frequencies, the impedance is dominated by the damping of that inductance (which for critical damping, equals sqrt(L/C), and the impedance simply shelves at or near its peak).
In other words, you can shelve the impedance, but you can't keep it going up (inductive) forever.
Since this is a masters thesis -- perhaps it would be more beneficial to present the process one should follow to synthesize a desired source, or design and analyze a fixture? These methods of improvement only scale so far, and depend critically on the components used. There are limits, both among commercial supply, and sheer physics, on those components (especially GBW and stability where op-amps are involved), which simply cannot be as general as the more involved methods.
Tim