Abstract: The power flow in distribution network can be changed by the connection of DG, the current is no long a single direction. Aiming at the problems such as malfunction, refusal and sensitivity of detrimental effects on the distribution system of DG，the method of a communication-based adaptive current protection must be proposed. Using the combination of GOOSE over UDP with adaptive setting of current protection，this protection solves those problems of detrimental effects on the distribution system of DG.