电站锅炉再热蒸汽温度的燃烧器摆角和喷水减温协调预测控制
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摘要
针对目前再热汽温控制系统中存在的局限性,从控制算法和切换逻辑2个方面对锅炉再热蒸汽温度控制进行改进,设计了一种使用燃烧器摆角和喷水减温作为再热蒸汽温度调节手段的协调预测控制方法,并将改进后的方法与常规预测控制和串级PID控制进行对比。结果表明:所提出的预测控制方法能实现燃烧器摆角和喷水减温控制的平滑无扰切换,提高了系统的调节性能和稳定性,大大减少了燃烧器摆角调节系统与喷水减温调节系统之间的来回切换次数。
To overcome the limitation existing in current reheated steam temperature control systems,a predictive control method was proposed by coordinatedly adjusting the tilter angle and attemperator spray,based on improved control methods for boiler reheated steam temperature from aspects of control algorithm and switching logic,and subsequently the control effectiveness was compared with that of conventional predictive control and cascade PID control.Simulation results show that the method proposed can help to realize smooth swithing between tilter angle adjustment and attemperator spray regulation without any disturbance,thus improving the control performance and operation stability of the system,and lowering the switching frequency between above two ways.
To overcome the limitation existing in current reheated steam temperature control systems,a predictive control method was proposed by coordinatedly adjusting the tilter angle and attemperator spray,based on improved control methods for boiler reheated steam temperature from aspects of control algorithm and switching logic,and subsequently the control effectiveness was compared with that of conventional predictive control and cascade PID control.Simulation results show that the method proposed can help to realize smooth swithing between tilter angle adjustment and attemperator spray regulation without any disturbance,thus improving the control performance and operation stability of the system,and lowering the switching frequency between above two ways.
引文
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[2]张启亚,曾德良,刘继伟,等.内模控制器在锅炉再热汽温调节上的应用[J].电力科学与工程,2010,26(12):44-48.ZHANG Qiya,ZENG Deliang,LIU Jiwei,et al.Application of internal model control for the boiler reheat steam temperature[J].Electric Power Science and Engineering,2010,26(12):44-48.
[3]华志刚,吕剑虹,张铁军.状态变量-预测控制技术在600 MW机组再热汽温控制中的研究与应用[J].中国电机工程学报,2005,25(12):103-107.HUA Zhigang,LJianhong,ZHANG Tiejun.Research and application of state variable-predictive control in 600MW unit reheater temperature control system[J].Proceedings of the CSEE,2005,25(12):103-107.
[4]王东风,王松.基于H2/H∞混合优化的锅炉汽温分数阶PIλDμ控制[J].动力工程学报,2014,34(3):210-215.WANG Dongfeng,WANG Song.Fractional-order PIλDμcontrol of boiler steam temperature based on mixed H2/H∞optimization[J].Journal of Chinese Society of Power Engineering,2014,34(3):210-215.
[5]牛培峰,孟凡东,陈贵林,等.直接型自适应模糊控制器的设计及其在汽温控制中的应用[J].动力工程学报,2010,30(1):22-26.NIU Peifeng,MENG Fandong,CHEN Guilin,et al.Design of direct adaptive fuzzycontroller and its application for steam temperature control[J].Journal of Chinese Society of Power Engineering,2010,30(1):22-26.
[6]李旭.再热汽温的动态特性与控制[J].动力工程,2009,29(2):150-154.LI Xu.Dynamic behavior and control of reheated steam temperature[J].Journal of Power Engineering,2009,29(2):150-154.
[7]刘劲权,王明春,唐志炳,等.基于Laguerre函数多模型预测控制的再热汽温控制系统研究[J].发电设备,2015,29(6):389-393.LIU Jinquan,WANG Mingchun,TANG Zhibing,et al.Multi-model predictive control of reheated steam temperature based on Laguerre function[J].Power Equipment,2015,29(6):389-393.
[8]张嘉英,王文兰.基于动态矩阵控制的再热汽温控制系统[J].电力自动化设备,2010,30(8):71-74.ZHANG Jiaying,WANG Wenlan.Reheated steam temperature control system based on dynamic matrix control[J].Electric Power Automation Equipment,2010,30(8):71-74.
[9]吴丹丹,张丽香,王俊刚.基于TDFMD PID的锅炉过热汽温控制系统研究[J].动力工程学报,2015,35(12):970-974.WU Dandan,ZHANG Lixiang,WANG Jungang.Study on boiler superheated steam temperature control system based on TDFMD PID[J].Journal of Chinese Society of Power Engineering,2015,35(12):970-974.
[10]华志刚.先进控制方法在电厂热工过程控制中的研究与应用[D].南京:东南大学,2005.
[11]席裕庚,李德伟,林姝.模型预测控制——现状与挑战[J].自动化学报,2013,39(3):222-236.XI Yugeng,LI Dewei,LIN Shu.Model predictive control—status and challenges[J].Acta Automatica Sinica,2013,39(3):222-236.
[12]刘向杰,孔小兵.电力工业复杂系统模型预测控制——现状与发展[J].中国电机工程学报,2013,33(5):79-85.LIU Xiangjie,KONG Xiaobing.Present situation and prospect of model predictive control application in complex power industrial process[J].Proceedings of the CSEE,2013,33(5):79-85.
[13]ISERMANN R,MUNCHHOF M.Identification of dynamic systems:an introduction with applications[M].Berlin,Germany:Springer Press,2011.
[14]席裕庚.预测控制[M].2版.北京:国防工业出版社,2013.