变电站自动化系统正朝着分散化、网络化方向发展。运用现场总线代替传统的串行通信 ,不仅能从根本上改善系统性能 ,而且使系统可靠、灵活、易于扩展。文中介绍了罗克韦尔自动化公司发展的由设备网、控制网和以太网 3层网络构成的 Net Linx技术 ,并探讨了基于 Net Linx技术的变电站自动化系统解决方案。 Substation automation system is moving in the direction of decentralization and network development. The use of field bus instead of the traditional serial communication, not only can fundamentally improve system performance, but also make the system reliable, flexible and easy to expand. This paper introduces the Net Linx technology developed by Rockwell Automation Inc, which is composed of equipment network, control network and Ethernet 3-layer network, and discusses the solution of substation automation system based on Net Linx technology.