In view of the problem of the lack of sufficient consideration of the high power quality requirement during the DG planning

a new optimal allocation model of inverter type DG considering voltage sags is proposed. The model is based on the model of the inverter DG in voltage sags

and the optimal allocation of inverter type DG is realized by considering the users’ satisfaction. An improved cuckoo search algorithm is used to solve the model. It is shown by the result that since inhibition of reverse variant DG on voltage sag is considered

the model proposed can accept more DG in the distribution network

while suppressing the effect of voltage sags

achieve the optimal economy of the planning.