燃煤汽包炉发电机组的动态建模及其运行数据验证  

Dynamic Modeling for a Coal-fired Drum Boiler Power Unit and Validation Through Using Actual Plant Data

作　　者：卓旭升[1] 周怀春[1] 杨超[1] 唐辉[1] 

机构地区：[1]煤燃烧国家重点实验室(华中科技大学),湖北省武汉市430074

出　　处：《中国电机工程学报》2008年第17期26-31,共6页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50721005).~~

摘　　要：基于机理分析并结合机组实际运行数据,建立了一台汽包锅炉燃煤机组的非线性动态模型。该模型描述了机组的汽包压力、主蒸汽压力、主蒸汽温度和输出功率的动态特性。该建模方法避免了附加试验信号对机组正常运行的影响。建模过程中,当机组变负荷运行时,其他重要参数如压力、蒸汽流量及吸热量对主蒸汽温度的动态特性的影响得到了研究;并且过热器吸热量由炉膛辐射能信号来确定。验证结果表明:在一定范围内,模型输出的4个输出变量基本上与机组数据是一致的。Based on the physical principles and actual plant data, a nonlinear dynamic model of a coal-fired drum boiler power unit was presented. The model describes the dynamics of the drum pressure, superheated steam pressure, superheated steam temperature and power output. This modeling method can avoid large disturbance on the normal operation of the power unit without using exotic trial signals. In modeling, the influence of other key parameters, such as pressure, mass flow rate and heat flux rate are considered in the dynamic of superheated steam temperature over a varying operation range, and the furnace radiation energy signal is employed to determine heat flux rate to the super-heater. The results of validation show that the four outputs of the model agree basically with the actual plant data.

关 键 词：热能动力工程 燃煤机组 非线性动态建模 模型验证 辐射能信号 

分 类 号：TK223[动力工程及工程热物理—动力机械及工程]