Firstly, the thesis brings out a scheme which Relay & Monitoring Unit(RLY) is connected in Switching Ethernet without Communication Manger Unit(CMU). The thesis realizes the scheme by two modes which are UDP and TCP.

• 通过对变电站自动化系统中数据流的特点分析和对常用的通信模式的比较,论文设计了测控保护装置接入无通信管理机的交换式以太网的组网方案,分别实现UDP组播+单播结合与TCP点对点传输两种方式,并对两种方式的优缺点进行了比较。