Abstract: The devices always used different communication protocols and media in automatic system of transformer substation, so they can’t communicate with each other normally. In order to make them interoperable, this paper firstly introduces real time operation system µC/OS-II and communication protocols, then presents a device with embedded operation system µC/OS-II, which can realize the communication between them and process data. This paper not only describes the hardware design but the idea of software design. This communication manager has many kinds of communication ports and supports many communication protocols. When we build or rebuild a transformer substation the choices would be greatly increased if the communication manager is used.

Key words: Communication manager, communication protocol, µ, C/OS-II

摘要： 为了解决变电站自动化系统中，不同生产厂家的设备由于采用不同的通信规约和通信介质，从而无法通信的问题；为了实现设备间的互换性和相互操作性，本文在介绍实时操作系统µC/OS-II和通讯规约的基础上，提出了基于嵌入式实时操作系统µC/OS-II的通信管理机。从硬件选型、软件实现流程和约定的通信协议上阐述通信管理机的软硬件设计。该管理机具有多种通信接口，支持多种规约的相互转换，能使不同种类的网络相互通信，从而大大提高变电站自动化系统对设备选择的自由度，具有广阔的应用前景。

关键词: 通讯管理机, 通信规约, µ, C/OS-II