| 基于简化热平衡方程的再热蒸汽流量实时软测量 |
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| 引用本文： | 闫姝,曾德良,刘吉臻,王玮,谢谢.基于简化热平衡方程的再热蒸汽流量实时软测量[J].中国电机工程学报,2011(5). |
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| 作者姓名： | 闫姝 曾德良 刘吉臻 王玮 谢谢 |
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| 作者单位： | 华北电力大学控制与计算机工程学院; |
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| 基金项目： | 国家863高技术基金项目(2007AA041105,2007AA04Z163)~~ |
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| 摘 要： | 再热蒸汽流量的软测量方法通常精确度不高或实时性不好。针对这个问题,该文研究了一种提高再热蒸汽流量测量实时性和准确性的方法。首先获得了基于简化热平衡方程的再热蒸汽流量稳态计算公式。该公式不包含待定参数,不需要用实验等手段来校正公式中的参数,且其计算精度相对其他公式来说也较高,然而该公式只适用于稳态工况。为此,又从精度不高的弗留格尔公式中提取了可以快速反映再热蒸汽流量变化的动态信息结构,并利用稳态计算公式在不同稳态工况下的计算值对其进行了参数标定,得到了动态计算公式。最后文章有效利用了稳态计算公式和动态计算公式的信息互补性,应用互补滤波器方法将上述2个公式在频域内进行了融合。经频域融合后得到的再热蒸汽流量不仅在机组稳态时准确度高还可以快速地反映再热蒸汽流量的变化。
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| 关 键 词： | 再热蒸汽 流量 热平衡方程 软测量 互补滤波器 |
A Soft-sensor Method of Reheat Steam Flow Based on Simplified Heat-balance Equation |
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| YAN Shu,ZENG Deliang,LIU Jizhen,WANG Wei,XIE Xie.A Soft-sensor Method of Reheat Steam Flow Based on Simplified Heat-balance Equation[J].Proceedings of the CSEE,2011(5). |
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| Authors: | YAN Shu ZENG Deliang LIU Jizhen WANG Wei XIE Xie |
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| Affiliation: | YAN Shu,ZENG Deliang,LIU Jizhen,WANG Wei,XIE Xie(School of Control and Computer Engineering,North China Electric Power University,Changping District,Beijing 102206,China) |
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| Abstract: | The existing soft-sensor methods of reheat steam flow always offer low accuracy and bad real-time property.Therefore,a new soft-sensor method of reheat steam flow was proposed for enhancing accuracy and real-time property.Firstly,a steady-state formula was obtained based on simplified heat-balance equation in which there was no undetermined parameter.However,it can only supply calculation valves of reheat steam flow with high accuracy when power units were at a steady state.Then the dynamic information stru... |
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| Keywords: | reheat steam flow heat-balance equation soft sensor complementary filter |
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