I would like to achieve the following:

All the polygons are located on a single layer. I already tried to use SAGA self intersection with the "power" as an identifier, but I get wrong duplicates and overlapping polygons boundaries.
I would like to achieve the following:

All the polygons are located on a single layer. I already tried to use SAGA self intersection with the "power" as an identifier, but I get wrong duplicates and overlapping polygons boundaries.