Generic Object Oriented Substation Event (GOOSE) is IEC 61850 standards to meet the demand of substation automation system fast message mechanism. According to the network structure of the monitoring network and GOOSE network, by using the power communication synchronous simulation platform (EPOCHS) for dynamic simulation of communication network. Based on making an analysis about GOOSE and the sampling value (SAV) of real-time simulation, the results provide a basis for the innovation of message priority, network bandwidth and the structure of the expansion.