a basic question regarding power electronics
The various names for you are using are not standard.  For example, where I went to school (RPI), there was electrical engineering and electric power engineering.  The first was the kind of circuits you'd find in a TV, for example, while the second was about utility-scale power systems.  I have also heard these two referred to as electronic engineering and electrical engineering.  Sometimes the term electronics applies to the first but not the second, sometimes to everything electrical.

So your question makes no sense without defining how exactly you are using your terms.  What exactly do you mean by "power electronics".  If that is the utility-scale power systems, then it is electric power engineering, or whatever it might be called in your area or at your university.  If by "power electronics" you mean things like 200 W class D audio amplifiers or 1 kW inverters, then those would usually be designed by a electrical engineer as apposed to a electric power engineer (or again, whatever your regional terms for those are).