To solve the impact of active distribution network bi-directional current on distribution network protection, this paper analyzes the protection PDN problem of the DER access, and puts forward the multi-branch pilot directional protection scheme based on topology of virtual node, which is suitable for aerial line distribution automation. The protection scheme adopts EPON technology, uses GOOSE transmission of EPON, FTU transfer starting component and directional component, and realizes the distribution network protection by using centralized pilot directional protection, which can well solve those problems of DG access. We design FTU and centralized protection device used in the practical ADN system, and test the up and down transmission delay of GOOSE and accurate tripping time of the protection. The experimental results show that multi-branch pilot directional protection scheme based on topology of virtual node is suitable for ADN, and has good application prospect.