Of course. But not nearly so elegantly.
Sometimes a low-tech, simple solution is the best.
Then again, if anyone could point to a 5Kw - 7.5kw VFD with an output into 0% - 100% full load that is\will:
sine wave output with THD <3%
supports Crest Factor of 3:1
support minimum Power Factor(Leading/Lagging) of 0.65 (either direction of power transfer) I'll let that one slide to .8pf
and has a regenerative front end.
And off-the-shelf would be nice - don't really want a custom built unit.
Now that would be an equally elegant solution.
ice
An output THD <3%
and a crest factor of 3:1? You can't have both
Anyway, it rather depends on what you want to do. Or, maybe not so much.
A 50Hz output that you want to load by sticking it back in a 60Hz utility?
Or vice versa?
The facility to load one or the other with additional passive loading?
The ability to cope with the full range of power factors?
Here's one we made earlier (to paraphrase that expression sometimes used on cooking shows....
)
One end is designed for power flow in either direction at 50 or 60Hz. The other can do the same. Or at any other frequency.
Admittedly it's a bit more than 7.5kW and has a few bells and whistles to provide control functions for the specific application. But all the parts are standard parts. Even the steel enclosures - apart from the top hat arrangement for ventilation.
I agree that a rotary set would be simpler in principle. More or less expensive? Don't know. More or less efficient? Without a shadow of doubt, the static solution is significantly more efficient.