超超临界二次再热机组过热汽温模型辨识  

Model Identification of Super-heated Steam Temperature for Double-reheat Ultra-supercritical Unit

作　　者：冯美方 吴恒运[2] 房方[1] 

机构地区：[1]华北电力大学控制与计算机工程学院,北京102206 [2]西安热工研究院有限公司,陕西西安710032

出　　处：《华北电力大学学报（自然科学版）》2016年第1期76-80,98,共6页Journal of North China Electric Power University：Natural Science Edition

基　　金：国家自然科学基金资助项目(61203107)

摘　　要：二次再热是进一步提升大型超超临界机组运行参数、提高机组运行效率的一项关键技术。该类机组的建设尚处于起步阶段,运行经验相对缺乏,为提高其运行控制水平,需要了解锅炉运行的热工特性,并建立兼具工程应用需求和理论研究价值的模型。在西安热工院开发的华能莱芜电厂2×1 000 MW机组仿真系统的平台上,进行了两级喷水减温扰动试验、烟气再循环扰动试验,探究过热汽温的变化规律。采用改进型的粒子群算法,对过热汽温被控对象进行辨识。研究表明改进型粒子群算法辨识精度较高,得到的过热汽温被控对象模型可用于开展机组优化运行与优化控制的相关研究。Double reheat steam system is a key process to increase the rated parameters and improve the thermal performance of the ultra-supercritical power units. For the construction of the double reheat ultra-supercritical power units is still in the initial stage, it＇ s necessary to get to know the boiler＇ s thermal performance, as well as to establish models for the engineering applications and theoretical researches. Based on the simulation system of Laiwu Power Plant developed by Xi＇ an Thermal Power Research Institute, disturbance tests about spray water of the super heater and recycled gas have been made. The improved particle swarm optimization algorithm is used to identify the parameters of the super-heated steam temperature system model. The simulation results show that the accuracy of this model can meet the requirements of the optimization control and operation.

关 键 词：二次再热 超超临界 过热汽温 辨识 改进粒子群算法 

分 类 号：TK39[动力工程及工程热物理—热能工程]