With the application of the Ethernet tending to be hybridized in networking in smart substation and packets in multiple protocols existing in the same network

the security and stability of the network has become the crucial point for the reliability of smart substation equipments. The optimization of network packets in two directions of sending and receiving is studied. That is

according to the characteristics of packets in smart substation network

packet flow control in groups and the multi-stage filtering in the receiving direction is put forward to suppress network packet storms and processing normal packet effectively; while in the sending direction

an optimization scheduling strategy based on packet priority classification is used to get the real-time performance and make full use of network bandwidth. Meanwhile all the strategies in this paper are implemented on the SoC hardware system

the test results showing that the stability and reliability of network communication in smart substation equipments is effectively improved.