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基于主元分析与现场数据的过热汽温动态建模研究
引用本文:张小桃,倪维斗,李政,郑松.基于主元分析与现场数据的过热汽温动态建模研究[J].中国电机工程学报,2005,25(5):0-135.
作者姓名:张小桃  倪维斗  李政  郑松
作者单位:1. 清华大学热能系,北京市,海淀区,100084;华北水利水电学院动力系,河南省,郑州市,450008
2. 清华大学热能系,北京市,海淀区,100084
摘    要:为克服试验建模与机理建模方法的不足,对利用现场数据建立过热汽温的动态模型进行了研究。通过对影响过热汽温的12个主要过程变量的运行数据进行主元分析,得到了2-3个主元,计算了各主元的贡献率、T^2统计量以及在T^2统计量较大时12个过程变量对第1主元的贡献,确定出过热器喷水流量是引起过热汽温变化的主导因素。基于现场数据,证明了过热汽温控制系统满足闭环可辨识性条件;并且建立了过热器喷水流量扰动下过热汽温的动态数学模型。对所建立的模型进行了仿真验证,模型反映了过热汽温的实际运行状况。

关 键 词:过热汽温控制系统  现场数据  过程变量  动态建模  动态数学模型  过热器  运行  主元分析  行数据  可辨识性
文章编号:0258-8013(2005)05-0131-05
收稿时间:2004-05-24
修稿时间:2004年12月9日

DYNAMIC MODELING STUDY OF SUPERHEATER STEAM TEMPERATURE BASED ON PRINCIPAL COMPONENT ANALYSIS METHOD AND ONLINE DATA
ZHANG Xiao-tao,NI Wei-dou,LI Zheng,ZHENG Song.DYNAMIC MODELING STUDY OF SUPERHEATER STEAM TEMPERATURE BASED ON PRINCIPAL COMPONENT ANALYSIS METHOD AND ONLINE DATA[J].Proceedings of the CSEE,2005,25(5):0-135.
Authors:ZHANG Xiao-tao  NI Wei-dou  LI Zheng  ZHENG Song
Affiliation:ZHANG Xiao-tao1,2,NI Wei-dou1,LI Zheng1,ZHENG Song1
Abstract:Models of super-heater steam temperature were developed using on-line data to improve the conventional testing method and physical law methods. The operation data of 12 process variables that influence the super-heater steam temperature values had been studied using principal component analysis method, 2~3 principal components had been obtained and the contributions of the principal components, the T2 statistical quantity and the contributions of 12 process variables to the first principal component at the biggest T2 statistical quantity had been computed. The dominant factor was super-heater spray flow. Based on on-line data, the identifiability of closed-loop control system of super-heater steam temperature can be met and dynamic models of super-heater steam temperature were obtained in the disturbance of super-heater spray flow. Simulations show that the models can reflect the facts of super-heater steam temperature.
Keywords:Thermal power engineering  Super-heater  steam temperature  Principal component analysis  Dominant  factor  Super-heater spray flow  Dynamic modeling
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