I submit this for your reading (read the entire blog!):
VO2max Power (PVO2max, or other terms like MAP, PPO, Pmax, Wmax, etc.) is a theoretical power target that corresponds to VO2max.
TR states it as being:
pVO2 max falling around 118-128% FTP.
So…the quandary being that you have to know where your VO2max process tops out (e.g. lab test) in order to find your exact pVO2max (however, as the article details, different tests will give different results). You don’t want to be doing 128% intervals if your VO2max is actually 118%.
Or just look at what your 3min max is and start cranking out 3min intervals.
edit — also including this awesome podcast: