This article describes the electrical auxiliary power plant automation system (EFCS) to take advantage of fieldbus and network communication technology to improve the automation of the electrical system, to solve DCS restrictions on electrical measuring points, as well as reducing the amount of cable laying and the space for cable entering electron room and construction time so that the cost can be reduced and benefit increased.%本文介绍发电厂厂用电电气自动化系统（EFCS）利用现场总线和网络通信技术的优势提高电气系统综合自动化水平，解决DCS对电气测点的限制，减少大量电缆的敷设以及电缆进入电子间需要的大量空间、施工时间，达到降本增效的目的。
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