Network communication system of intelligent substation

The utility model provides a network communication system of an intelligent substation. The network communication system can carry out communication of MMS, SV, GOOSE and IEEE1588. The system comprises a station control layer, a spacing layer and a process layer of the intelligent substation, a central switch, a plurality of main switches and redundant switches arranged for each main switch, all the main switches and the redundant switches are connected with the central switch; the main switches are connected end to end to form a main switch layer; the redundant switches are connected end to end to form a redundant switch layer; each device of a station control layer, a spacing layer and a process layer of the intelligent substation is connected with a main switch and a redundant switch corresponding to the main switch. Compared with a commonly used star-shaped topological structure and a commonly used ring-shaped topological structure, the substation communication system has the advantages that the redundanc