中文摘要：

以某600MW超临界机组为研究对象，建立了适用于在额定工况下作小扰动仿真的线性集总参数简化数学模型，得出了在额定工况条件下的传递函数。研究了锅炉主要调节量（汽机调门、燃料量、给水阀）对机组动态特性的影响。所得模型能较好反映机组在额定工况条件下的动态特性，所得结果对超临界机组控制器的研究有一定的价值。

英文摘要：

Aiming at a 600MW supercritical unit,a simplified model of linear lumped parameter is built, which is fit for small disturbance simulation in rated condition. The transfer function for rated condition is developed. The influence of major boiler control variables （turbine valve, fuel input, feed-water valve） on the unit＇s dynamic characteristics is studied. The proposed model well reflects dynamic characteristics of the unit in rated condition,and the outcomes have certain value for the research on supercritical unit controllers.