变电站综合自动化系统中的总线技术

The Bus Technique in Substation Integrated Automation System

变电站综合自动化系统最大的特点是基于数字通讯的分布式网络结构。但由于在一个变电站综合自动化系统中,保护、测控、录波等装置由不同厂家提供,往往造成同一系统存在多种类型的总线,对系统的性能和可靠性造成一定的影响。本文综合分析了行种外部串行通信总线的技术特点,认为除不同类型总线的设备之间通信存在一定的问题外,RS-485总线和多种现场总线本身都能满足变电站综合自动化系统的需求,因此在实际应用中,不必深究系统采用何种总线,而要注意尽可能在同一系统中使用相同类型的总线。

The main feature of a substation integrated automation system is the distributed network based on digital communication. As the devices for protection, measure - control and recording in the system are supplied from different manufactory, so that there is often multi - kinds of bus in a system to effect its characteristic and reliability. In this paper the author analyzed integrally the technique characteristic of variant external serial communication bus, and pointed that except there is some matter in the communication between the devices to be with different type bus, the demands of the system could be met by RS-485 bus and many other kinds of bus in site, so that in real application, the attention should be put on that the type of bus used in a syslern, but not the kinds of bus, should be the same as possible.