超临界机组燃水比系统的自耦PID控制方法  

Research on Auto-Coupling PID Control Method of Firing Rate to Feed Water Ratio System of Supercritical Unit

作　　者：张国林 曾喆昭[1,2] 唐钰淇 ZHANG Guolin;ZENG Zhezhao;TANG Yuqi(College of Electrical and Information Engineering,Changsha University of Science and Technology,Changsha 410114,Hunan Province,China;Hunan Zhezhao Automation Control Technology Co.,Ltd.,Changsha 410000,Hunan Province,China)

机构地区：[1]长沙理工大学电气与信息工程学院,湖南省长沙市410114 [2]湖南喆昭自动化控制技术有限公司,湖南省长沙市410000

出　　处：《发电技术》2025年第2期344-352,共9页Power Generation Technology

基　　金：湖南省教育厅重点项目(21A0183);长沙理工大学研究生科研创新项目(CSLGCX23060)。

摘　　要：【目的】针对超临界机组燃水比(firing rate to feed water ratio,FR/FW)控制过程中存在强耦合性、负荷量大和抗扰动能力弱等问题,根据自耦PID控制理论提出了自耦PI(auto-coupling PI,ACPI)新型控制方法。【方法】将多变量FR/FW系统等效为多个单变量闭合回路系统,并将FR/FW系统的耦合性、已知或未知内部动态、外界扰动等一切复杂因素定义为总扰动,进而将FR/FW控制系统等价映射为线性扰动系统,构建了在总扰动激励下的受控误差系统。在此基础上,对每个单变量系统设计了基于速度因子的自耦PI控制器,并在复频域理论分析了控制系统的鲁棒稳定性和抗扰动鲁棒性。【结果】与PI、自抗扰控制方法相比,ACPI控制方法具有响应速度快、无超调的动态品质与抗扰动能力强的稳态性能。【结论】研究成果对提升超临界机组FR/FW系统的控制精度与鲁棒性具有重要意义。[Objectives]Aiming at the problems of strong coupling,large load,and weak disturbance resistance in the firing rate to feed water ratio(FR/FW)control process of supercritical units,a new type of auto-coupling PI(ACPI)control method is proposed based on the theory of autocoupling PID control.[Methods]The multivariable FR/FW system is equivalent to multiple single-variable closed-loop systems,and all complex factors such as the coupling,known or unknown internal dynamics,and external disturbances of the FR/FW system are defined as total disturbances.Then,the FR/FW control system is equivalently mapped to a linear disturbance system,and a controlled error system under total disturbance excitation is constructed.Based on this,a speed factor based ACPI controller is designed for each single variable system,and the robust stability and disturbance resistance of the control system are analyzed in the complex frequency domain theory.[Results]Compared with PI and active disturbance rejection control methods,the ACPI control method has fast response speed,dynamic quality without overshoot,and strong steady-state performance with strong disturbance resistance.[Conclusions]It is of great significance to improve the control accuracy and robustness of the FR/FW system in supercritical units.

关 键 词：火力发电 超临界机组 燃水比(FR/FW) 自耦PI(ACPI) 速度因子 抗扰动鲁棒性 

分 类 号：TK221[动力工程及工程热物理—动力机械及工程]