大容量超临界直流锅炉数学模型的研究

Study on Dynamic Model for Large Capacity Supercritical Once-through Boiler

采用模块化建模方法开发了大容量超临界直流锅炉动态仿真数学模型。根据超临界直流锅炉的工作机理和特性,以能量和质量守恒原理为基础,详细论述了其蒸发系统的数学模型算法,并结合其它相关模块算法,利用华北电力大学STAR-90仿真系统开发平台,建立了600 MW超临界直流锅炉的实时仿真模型。仿真试验表明,所开发的数学模型能够正确反映对象的动态特性,可为大容量超临界仿真系统的开发及超临界直流锅炉控制系统的设计提供参考。

With modular modeling method, one real-time dynamic simulation model for a supercritical once-through boiler is developed. After the work mechanism and characteristics ofa supercritical once-through boiler are analyzed, the model algorithms of the evaporator system are discussed on the basis of the mass and energy conservation principle. Along with the relevant modular algorithm,the complete real-time simulation model is built on the platform of STAR-90 simulation support system, which the simulated object is a 600 MW supercritical once-through boiler. The simulation tests showed that the mathematical model Can correctly simulate the transient process of the simulated object. The model can be used for the big capacity supercritical once-through boiler simulator development, control system design and analysis of the supercritical once-through boiler.