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由于循环流化床锅炉结构复杂、运行模态多变,为对其动静态特性进行准确描述和有效分析,提出一种基于组件的风烟系统多模态建模与时序分析方法:首先,根据模态切换过程中各相关设备和物理量之间的关联关系,建立系统的模态感知模型;然后,通过从系统点火准备至点火完成中多模态切换过程的时间统计,实现关键设备及参数的时序分析.以宁夏宁东330 MW循环流化床锅炉机组为例,采用该方法对引风机启动过程中的故障进行了模拟与诊断,诊断结果证明了所提方法的适用性和有效性.“,”Due to the complexity of the structure and varied operation modes of a circulating fluidized bed boiler,through accurately describing and effectively analyzing its dynamic and static characteristics,proposed was a method for multi-mode modeling and time sequence analyzing a module-based air and flue gas system.First,according to the correlation relationship among relevant equipment items and physical quantities in the process of modes being switched over,a mode perception model for the system was estabhshed.Consequently,through counting the time duration of the process of the modes being switched over from the ignition preparation of the system to the completion of the ignition,a time sequence analysis of the key equipment items and parameters was realized.With a 330 MW circulating fluidized bed boiler unit in Ningdong County of Ningxia province serving as an example,a simulation and diagnosis were conducted of its faults on a simulating machine in the startup process of the forced draft fans.The diagnostic results prove that the method thus proposed is applicable and effective.