@ triconex―西屋....
现代高炉炉顶压力高达0.15~0.25mpa,炉顶煤气中存有大量势能。高炉煤气余压能量回收透平发电装置(blast-furnacetoppressure recovery turbineunit),简称trt,就是利用高炉炉顶的余压余热,将高炉煤气导入透平膨胀机作功,驱动发电机发电的一种能量回收装置。黑龙江西林钢铁集团有限公司(简称西钢)采用了四川成发(集团)公司生产的trt发电机组,自2008年12月1日投入运行以来,机组运行稳定,经济效益明显,达到了预期的设计效果。 西钢所用的trt发电装置由透平主机系统、高低压发配电系统、润滑油系统、液压伺服控制系统、给排水系统、大型阀门系统、氮气密封系统、自动控制系统八大部分组成。 vijeo citect软件的特点 vijeocitect软件是施耐德电气的专为modicon控制平台量身打造的 scada 监控软件。它是一个完全集成的 hmi/scada解决方案,通过为客户提供高度可靠,扩展性极强的监控系统,从而实现低投入高回报的应用目的。其简单易用的工具和强大功能使开发变得更简单更快速,轻松满足各种企业要求。我们通过在trt控制系统中的实际应用,我深深地感到vijeocitect软件具有许多优点: • vijeo citect软件功能强大,对控制系统中所要求实现的控制功能都能实现。 •内嵌vba (visual basic forapplication)编程,简便易学。在不需要懂得很多vba编程技巧的情况下,也能发挥出强大功能。 •画面功能非常强大,vijeo citect软件包含大量图形工具,使用户能够快速简单地开发系统。 •集成开发环境:workspace tm ,应用十分灵活、方便。 • 增强的网络功能,为系统提供灵活的可扩展性。 • vijeocitect采用许多工业标准技术,保证其开放性和可扩展性,使得系统的开发和集成变得十分简便。 • 增强的安全性和可靠性。 vijeo citect软件在trt项目操作站中的应用 在此项目中我们采用windows xp professional操作系统,该系统是现在工业控制中广泛采用的操作系统,具有稳定高效、不容易崩溃等良好特点,适合监控系统运行时要求安全、稳定的要求。vijeocitect采用了开放式的系统结构,并运用了微软的一些工业标准技术,可以在很短的时间内就可以开发出非常直观,十分有利于监控系统的集成开发。 1.1 网络及设备驱动的配置 利用工业以太网使plc与上位机之间通讯,软件采用了vijeocitect,利用mbe驱动程序从设备获取数据。vijeo citect软件提供与plc等硬件设备的接口,可将数据从寄存器读出。 在scu配置窗口设置用mbe—modbus etherent 7.17,,并在configure i/o drivers列表中选择安装。vijeo citect数据库可从驱动程序映射表中检索数据,处理过程数据(包括指令)等。 vijeocitect组态软件首先通过mbe驱动程序软件接口从现场的模板中获取数据,存入dit驱动程序映像表中,vijeocitect的内部数据库(pdb)通过sac程序从dit表中获取它所需的数据,应用软件(如vijeocitect的画面运行程序、报表生成程序等)都通过内部数据库访问软件从vijeocitect内部数据库中获取来自过程硬件的信息,这样就可以实现在工业流程画面上动态地显示现场各过程硬件的运行状态,数据也可以按相反的顺序写回现场模板,执行控制操作。 1.2.应用程序的配置 vijeo citect重要的功能是为用户提供了可视化的窗口进行过程信息处理。vijeocitect在用户屏幕上提供的图形化过程信息,包括原始数据、计算数据、报警、变量字符串、点信息、趋势报警或变量状态。图形应用程序的核心是从数据库访问信息。为了直接显示数据,图形应用程序提供了多样性的链接方式,链接可以有多种格式及配置的灵活选择,对系统或过程数据进行显示。操作人员使用链接也能向数据库写数据。数据源来自vijeocitect数据库,这些数据传输可能是双向的。针对操作员设定只有运行的权限。
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