Research and Modelling of Reheater Dynamic Characteristic In Power Plants
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摘 要
以大唐盘山电厂600MW亚临界机组为对象,对锅炉再热器的动态特性进行了研究,通过机理分析和模型简化,建立了包含水及水蒸气状态参数模型、压力—流量通道模型和焓-温通道模型的再热器系统综合模型。建模过程中,通过引入由风量和烟气氧量构造的热量信号,成功解决了再热器吸热量不可测问题。基于该电厂的运行数据,利用Matlab/Simulink软件搭建该动态模型并进行仿真验证,结果表明: 仿真结果与实际运行数据吻合,可以很好地反映再热器出口蒸汽流量、压力和温度的动态特性。
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Abstract
Taking the 600MW subcritical power unit in Datang Panshan Power Plant as an object of study,a model has been built up including water and steam state parameter model,the pressure- flow channel model and enthalpy- temperature channel model through mechanism analysis and model simplification,so as to study the dynamic characteristics of the power plant Boilers reheater.In above modelling processes,the problem of immeasurability of absorbed heat in reheater has been resolved successfully,by means of introducing the heat signal calculated by air flow and the oxygen content in the flus gas.Based on the plant operating data,Matlab/Simulink software has been used to simulate and test the dynamic model.The results show that the simulation results agree well with the actual operating data and can well reflect the dynamic properties of reheater outlet steam flow,pressure and temperature.
中图分类号 TM311
所属栏目 研究与探索
基金项目 国家重点基础研究发展计划项目(973计划)(2012CB215203)
收稿日期 2013/8/16
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备注尹昌洁(1990-),男,硕士研究生,研究方向为火电机组建模与优化控制。
引用该论文: Yin Changjie,Liu Jizhen. Research and Modelling of Reheater Dynamic Characteristic In Power Plants[J]. Power & Energy, 2013, 34(5): 445~448
尹昌洁,刘吉臻. 火电机组再热器动态特性研究与建模[J]. 电力与能源, 2013, 34(5): 445~448
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参考文献
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【2】黄景涛,马龙华,茅建波,等.基于支持向量回归的300MW电站锅炉再热汽温建模[J].动力工程,2006,26(7): 19-24.
【3】李旭.再热汽温的动态特性与控制[J].动力工程,2009,29(2): 150-154.
【4】刘吉臻,曲亚鑫,田亮,等.基于偏最小二乘回归的锅炉再热汽温建模[J].中国电机工程学报,2011,31(11): 99-105.
【5】闻雪平,王文欣,王爱晨,等.电站锅炉再热系统动态特性数学模型的研究与应用[J].锅炉技术,2012,43(2): 17-20.
【6】PRIETO M M,SUAREZ I,FERNANDZ F J,et al. Application of a thermal model to a power plant reheater with irregular tube temperatures [J].Applied Thermal Engineering,2007,27(1):185-193.
【7】PRIETO M M,GARCIA F, RAMON I S,et al. Experimental thermal behavior of a power plant reheater[J].Energy,2006,31(5): 665-676.
【8】章臣樾.锅炉动态特性及其数学模型[M].北京: 水利电力出版社,1987.
【9】吕崇德,任挺进,姜学智,陈芳真.大型火电机组系统仿真与建模[M].北京: 清华大学出版社,2002.
【10】卓旭升,周怀春,陈楠.过热蒸汽比焓和密度的双线性拟合[J].华中科技大学学报(自然科学版),2007,35(12): 111-113.
【11】田亮,刘鑫屏,赵征,等.一种新的热量信号构造方法及实验研究[J].动力工程,2006,26(4): 499-502.
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