锅炉单相受热管的三层嵌套建模研究  

Study of the Three-layer Nested Model for the Single-phase Heated Tubes of a Boiler

作　　者：康英伟[1] 薛阳[1] 黄伟[1] 陆昌贵[1] 

机构地区：[1]上海电力学院自动化工程学院,上海200090

出　　处：《热能动力工程》2013年第4期363-367,434-435,共5页Journal of Engineering for Thermal Energy and Power

基　　金：国家自然科学基金资助项目(61040013);上海高校青年教师培养资助计划(sdl11007)

摘　　要：出于开发高精度、低计算量且便于使用的仿真模型的需要,建立了锅炉单相受热管的三层嵌套模型并对其进行了研究。基于传递函数泰勒级数展开方法的理论分析表明,对于入口焓、入口流量及热流量的扰动,三层嵌套模型分别以三阶、一阶和二阶精度逼近于分布参数模型。以600 MW亚临界压力锅炉过热器为对象的仿真结果表明,三层嵌套模型的动态响应与分布参数模型非常吻合,在3种扰动下,三层嵌套模型的性能相比二层嵌套模型均有十分显著的改善。三层嵌套模型为实时全工况仿真和控制系统仿真提供了一种具有竞争力的模型选择。To the needs to develop various high precision simulation models with a low calculation work load and facilitate to use,established was a three-layer nested model for single-phase heated tubes of a boiler and a study was performed of the heated tubes. The theoretically analytic results based on the Taylor series development method of the transfer functions show that for a disturbance to the enthalpy,flow rate and heat flux at the inlet,the calculation results of the three-layer nested model can approach to those of the distributed parameter model at the third-order,first-order and second-order precision respectively. The simulation results with the superheater of a 600 MW subcritical pressure boiler serving as the object show that the dynamic response of the model in question is in very well agreement with that of the distributed parameter model. Under the three kinds of disturbance,the performance of the three-layer nested model has been improved most conspicuously when compared with that of the two-layer nested model. The three-layer nested model can offer a competitive model choice for simulating real-time full-load simulation and control systems.

关 键 词：锅炉 单相受热管 集总参数 嵌套结构 模型 

分 类 号：TK223.3[动力工程及工程热物理—动力机械及工程]