Relay protections cut the power transmission lines when the electric signals reach the action thresholds. Setting calculation is an important process to determine and verify the thresholds of relay protections. However, the integration of new energy generators (NEGs) will make fault features different from those produced by the traditional synchronous generators, making traditional setting calculation unreliable. So far, there is still a lack of practical modeling method, especially for the unbalanced fault condition, that can be well adapted to the protection setting calculation. As the proportion of NEG increases, inaccuracy of setting calculation could increase the risk of power system operation security. First, this paper divides the modeling of various NEGs into three types according to their control strategies during asymmetric faults. For each type of control strategy, the stand-alone equivalence method is proposed, which is then demonstrated by the photovoltaics (PVs) and wind turbines in actual systems. Finally, the accuracy of practical equivalence modeling methods in this paper is verified by short-circuit calculations.