Hello,


I'm relatively a newbie with Modelica, but not in process control (closed loop control) and simulation. I have  experimented that limit management is sometime tricky.
You must always simulate a real system, not an ideal one that could lead for instance  to infinite currents, zero times responses etc. and with realistic initial conditions.

/Bruno

PS:  to simulate Converters, I think you better can use PSPICE like softs (it's less sexy but more efficient than OpenModelica). LTspice is free.