What is the relationship between GREF and PMECH
Based on this PPSPY post "What is the base value for the generator GREF? " the GREF is represented as
GREF = DROOP*PMECH
However, I sometimes encounter cases where this equation is not giving the expected answer compared to PSSE simulations. Is this GREF equation a general equation for all governor models? or is the equation different for different models?