中文摘要：

为了准确计算燃煤电站锅炉在运行过程中实时入炉煤量,并将计算结果提供给燃煤热值在线辨识系统,针对300 MW电站锅炉制粉系统,采用机理建模的方法建立了制粉系统模型。模型的参数设定与制粉设备的结构数据及锅炉侧运行数据相关,从而使模型具有可扩展性。利用在线运行数据的验证结果表明,制粉系统模型的引入可以显著改善燃煤热值辨识的动态性能,对提高电站控制品质有潜在应用价值。

英文摘要：

A mechanism model of coal pulverizing system is developed to calculate the coal powder flow rate entering the combustion chamber. The model is validated with the data of a 300 MW coal-fired power plant. This model is going to be used to improve the identification accuracy of the calorific value, which usually takes the coal flow rate entering the coal feeder as the input. The model parameters are determined based on the structural and operational data of the pulverizing system. Results of the pseudo online identification of the caloric value demonstrate that the model is able to capture the dynamic properties of the system with relatively high accuracy. Therefore, it has the potential to improve the control performance of the utility boiler.