一、前言随着计算机技术的引入,传统的数据采集和控制系统(又称远动系统)正在产生巨大的变革。特别是七十年代以来迅猛发展起来的微型计算机,由于其具有价格低、功能强、体积小、可靠性高等多种优点,从而为这一变革开拓了新的前景。因此,微型机远动系统是目前远动方面研究的主要课题之一。为了满足随电网增大而不断提高的监控要求,调度中心的远动系统不仅应具有很强 I. Introduction With the introduction of computer technology, the traditional data acquisition and control system (also known as remote system) is undergoing tremendous changes. Especially since the seventies, the rapid development of the microcomputer, due to its low price, powerful, small size, high reliability and many other advantages, so as to open up new prospects for this change. Therefore, the remote control system of microcommunication is one of the main topics in the research of tele-motion. In order to meet the increasing monitoring requirements with the increase of power grids, the telecontrol system of dispatching center should not only have strong