监控站软件操作系统安装Windows2000 SP4,相关监控软件采用CIMPuCITY 6.0。两台监控站属于对等站.通过工业以太网与工控PLC相连,共同进行汽轮鼓风过程控制、实时数据的监视、运行参数的历史趋势、重要参数的报警记录、报表打印、手/自动操作方式的选择、报警值、停机值及过程设定值的调整等操作。PLC编程采用Versa软件,支持模块化程序结构,程序根据整个子系统不同的控制对象作成相应子程序功能块,由主程序进行调用。子程序功能块主要包括定风压系统的调节、防端振系统的调节、数据采集与处理逻辑联锁等。·定风压系统的调节∶根据高炉工艺生产运行情况,通过监控站面面完成定风压调节手/自动操作方式的选择和所需风压值的设定,模拟量输出模块发出4-20mA的信号控制电液伺服阀,电液同服阀通过油压来调整风机静叶的开度(21°79″),从而实现高炉不同的风压值,控制过程·防端振系统的调∶防端振系统的调节是通过对防瑞阀(在风机的排气侧与大气直接相连)开度的调节来完成的。为了安全起见,防喘阀选择失电全开,控制阀的开度为4-20mA,4mA为全开,20mA为阀门全关,整个动作过程为快开慢关。
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