基于中间点温度前馈的主汽温模糊PID控制系统
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摘要
简要介绍了超临界直流锅炉的概况,分析了中间点温度控制对主蒸汽温度稳定的重要性,将中间点温度变化视为主汽温波动的外扰,设计前馈补偿器。针对被控对象大惯性、大迟延的特性,利用比例因子可调的模糊控制器与PID相结合,可以实时调整控制器的参数,以改善控制系统的性能。采集某热电厂350 MW超临界机组仿真系统的运行数据,辨识出不同负荷下被控对象及扰动通道的传递函数,在SIMULINK中进行仿真试验,验证了改进后的前馈串级控制系统的效果。
This paper briefly introduces the general situation of supercritical once-through boiler. The importance of intermediate point temperature control to the stability of main steam temperature is analyzed. By regarding the intermediate point temperature change as the external disturbance of main steam temperature fluctuation, a feedforward compensator is then designed. Considering the characteristics of large inertia and large delay of the controlled object, a fuzzy controller with adjustable proportional is designed and combined with PID to improve the performance of the control system. The operation data of the 350 MW supercritical unit simulation system of Datang International Shenfu Thermal Power Plant was collected,and the transfer function of the controlled object and the disturbance channel under different loads was identified. The simulation test was carried out in SIMULINK to verify the improved feedforward cascade control system.
This paper briefly introduces the general situation of supercritical once-through boiler. The importance of intermediate point temperature control to the stability of main steam temperature is analyzed. By regarding the intermediate point temperature change as the external disturbance of main steam temperature fluctuation, a feedforward compensator is then designed. Considering the characteristics of large inertia and large delay of the controlled object, a fuzzy controller with adjustable proportional is designed and combined with PID to improve the performance of the control system. The operation data of the 350 MW supercritical unit simulation system of Datang International Shenfu Thermal Power Plant was collected,and the transfer function of the controlled object and the disturbance channel under different loads was identified. The simulation test was carried out in SIMULINK to verify the improved feedforward cascade control system.
引文
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[19]李永华,李军烁,曹建行.喷水减温系统改造及经济性分析[J].应用能源技术,2016(8):19-23.
[20]吕彦杰,牛昱光,张谦.超超临界机组二模态过热蒸汽温度控制策略研究[J].热力发电,2014(8):71-74.
[21]荣亮,游有鹏.伺服作动器动态加载控制系统研究[J].机械与电子,2017,35(4):39-43.
[22]王卫兵,张惠,徐倩.减温减压系统模糊PID温度控制器的设计[J].哈尔滨理工大学学报,2016,21(5):96-100.
[23]王刚,陆海荣,白绪涛,等.模糊自适应PID控制在主汽温控制中的应用研究[J].电力安全技术,2017,19(11):40-43.
[24]吴成渝,王超,李斌.模糊自适应PID串级控制在主汽温控制中的应用[J].电子设计工程,2018,26(22):122-125.
[25]王刚,陆海荣,白绪涛,等.模糊自适应PID控制在主汽温控制中的应用研究[J].电力安全技术,2017,19(11):40-43.
[2]北京国电智深控制技术有限公司.国电泰州电厂2×1 000 MW二次再热超超临界机组控制系统项目[J].自动化博览,2017(7):32-34.
[3]张翔. 600 MW超临界锅炉的给水控制系统优化研究[J].工程技术研究,2018(1):123-124.
[4]李伟. 660 MW超临界锅炉主、再热汽温影响因素及调节措施[J].现代工业经济和信息化,2017,7(23):90-91.
[5]李泉,尹峰,陈波.超临界机组主汽温模型预测控制研究[J].浙江电力,2016,35(10):40-42.
[6]王炳淇,韩小渠,张程,等.褐煤锅炉蒸汽温度模糊控制仿真研究[J].工程热物理学报,2017,38(1):27-32.
[7] MA Y,YANG S,CAI S,et al. The simulation research and neural network modeling of superheated steam temperature characteristics for ultra-supercritical unit[C]//Control&Decision Conference. IEEE,2015.
[8]田中大,李树江,王艳红,等.基于隐式PIGPC的火电厂主汽温系统控制[J].系统仿真学报,2017(2):445-452.
[9] GUO X,HUANG J,WANG L, et al. On neural network modeling of main steam temperature for ultrasupercri-tical power unit with load varying[J].PROCESSES,2016(136):431-437.
[10]王永林.基于插值和拟合技术的过热汽温非线性控制研究[J].热能动力工程,2018(5):21-25.
[11] SARDA P, HEDRICK E, REYNOLDS K, et al.Development of a dynamic model and control system for load-following studies of supercritical pulverized coal power plants[J]. PROCESS,2018,11(6):73.
[12]常志达,周云龙.电站锅炉水冷壁压降特性研究[J].东北电力大学学报,2016,36(4):43-48.
[13]马玉峰,付黎明,崔方辰.加强直流锅炉运行调整、防止管壁超温[J].山东工业技术,2016(17):56-58.
[14]施燕美,蒋小东.半超超临界机组给水控制策略[J].电力勘测设计,2017(1):31-35.
[15]王亚顺,欧丽君.超临界直流锅炉对象特性及控制策略的研究[J].水利电力机械,2007,29(12):39-42.
[16]李辉,程亮.超临界机组主蒸汽温度控制策略研究[J].广西节能,2016(1):28-30.
[17]秦达飞.超临界锅炉中间点温度增益切换控制方法研究[D].保定:华北电力大学,2014.
[18]杨子豪,张燕平,高伟.基于给水温度前馈的中间点焓值模糊控制系统[J].热力发电,2017,46(6):62-68.
[19]李永华,李军烁,曹建行.喷水减温系统改造及经济性分析[J].应用能源技术,2016(8):19-23.
[20]吕彦杰,牛昱光,张谦.超超临界机组二模态过热蒸汽温度控制策略研究[J].热力发电,2014(8):71-74.
[21]荣亮,游有鹏.伺服作动器动态加载控制系统研究[J].机械与电子,2017,35(4):39-43.
[22]王卫兵,张惠,徐倩.减温减压系统模糊PID温度控制器的设计[J].哈尔滨理工大学学报,2016,21(5):96-100.
[23]王刚,陆海荣,白绪涛,等.模糊自适应PID控制在主汽温控制中的应用研究[J].电力安全技术,2017,19(11):40-43.
[24]吴成渝,王超,李斌.模糊自适应PID串级控制在主汽温控制中的应用[J].电子设计工程,2018,26(22):122-125.
[25]王刚,陆海荣,白绪涛,等.模糊自适应PID控制在主汽温控制中的应用研究[J].电力安全技术,2017,19(11):40-43.