Umm... Yes it is.Just because they are an IPP does not make them suitable or on the same level. The grid is not designed to carry power both ways. From your own admission these are end users of power where it's stepped down and not up.
The grid is a linear system it doesnt care which way the power flows! If there is a system with
1000 MW generation --> grid --> 1000MW consumption
It will work exactly as well if you reverse those arrows