The power station is the source of the power of the State Grid, and the development of information automation and intelligence of power plants has always been the direction of the efforts of the electric power. Distributed control system (DCS) has been developing rapidly since the mid 70s. In order to further promote the development of power plant digitalization and information, the data and information of DCS system and the principle of convenient management are gradually realized. The Ethernet transmission is a major trend in the development of industrial control and automation in power plants.
The field data access layer is attached to the I/O layer of DCS through an interface conversion server, and the data information can be mapped into the data information on the DCS I/O bus, so that the DCS control information is integrated. The data communication layer adopts the redundant ring network structure composed of the main control system 1# and the 2# machine. The uplink is through the MISCOM7026 connection workstation, the engineer station and the application server of the mewei Gigabit Ethernet switch, and through the MIEN6208 connection control management host station of the mewei 100 megabyte Ethernet switch, the whole network topology The overall architecture of the two tier redundant ring network is adopted, and the I/O site can be expanded by cascading. The redundancy structure of the whole system is realized to ensure the reliability and stability of data transmission.