Analysis of networking mode caused by GOOSE delay of smart substation

Based on the IEC61850 standard, real-time reliable data transmission is an important content of the intelligent substation process bus communication. All of control, protection and current voltage signals in the intelligent substation are transferred in a network. Communication network as information exchange hub of the intelligent substation, the performance of system network for control and protection system function has played a decisive role. That is the foundation for safe, reliable operation of the intelligent substation. This paper analyzes the network transmission characteristics of GOOSE, the requirements of network switch and tests the performance of system network. This paper studies the transmission delay, store-and-forward delay, switch delay, queuing delay. According to the network flow, this paper analyzes quantitatively network delay which effects on the performance of the intelligent substation, calculates the total delay, verifies the validity, rationality of the GOOSE network trip method.