用于控制系统研究的300MW机组锅炉动态模型

依据系统机理推导了300MW机组锅炉的动态模型.模型的输入为给水阀开度、汽机调门开度、燃料量、给水温度;输出为汽包压力、汽包水位、蒸汽流量.模型中各系数与运行工况有关,可根据当前的汽包压力、锅炉物理结构数据及水蒸汽性质得到.该模型反映了实际系统的时变性及非线性,可用于基于模型的锅炉控制算法的研究,也可用于火电站实时仿真机上.

A Boiler Model of 300MW Power Unit for Control System Performance Studies

The nonlinear dynamic boiler model of 300MW power unit is given, which is derived from mass and energy balance relationship. The inputs of the model are feedwater valve position, steam valve position, fuel valve position and feedwater temperature; the outputs of the model are drum pressure, water level and main steam flow. The parameters of the model can be obtained from the pressure in the drum, the physical dimensions and characteristics of the boiler and the steam and water parameters table. The model can be used for synthesis of model-based control algorithms of boiler system. It also can be used for setting up a real-time simulator for testing new boiler control system and operator training.