基于IGPC-NADRC火电机组制粉系统控制策略  

Thermal power unit powder system control strategy based on IGPC-NADRC

作　　者：冯旭刚 张泽辰 王正兵 宋澜波 FENG Xugang;ZHANG Zechen;WANG Zhengbing;SONG Lanbo(Anhui University of Technology,Electrical and Information Engineering,Maanshan 243032,China;Hunan Valin LY Steel Company,Loudi 417009,China)

机构地区：[1]安徽工业大学电气与信息工程学院,安徽马鞍山243032 [2]湖南华菱涟源钢铁有限公司,湖南娄底417009

出　　处：《中南大学学报（自然科学版）》2023年第7期2904-2918,共15页Journal of Central South University:Science and Technology

基　　金：安徽高校自然科学研究重大项目(KJ2021ZD0042);安徽省重点研究与开发计划项目(2022f04020004)。

摘　　要：针对火力发电机组制粉系统存在参数不稳定、大滞后及多变量的问题,本文构建非线性最小二乘法辨识模型,采用隐式广义预测算法预测模型输出,构造非线性扩张状态观测器(NESO),估计系统存在的干扰并补偿,设计应用于火力发电机组制粉系统的隐式广义预测非线性自抗扰控制策略(IGPC-NADRC),化简内模结构并分析系统稳定性。在仿真实验中采用时域分析法验证控制器内关键参数对系统输出的影响;设计抗干扰实验和变设定值实验,比较IGPC-NADRC控制、动态矩阵(DMC)自抗扰控制(ADRC)、IGPC-PID控制策略和DMC-PID控制策略的控制效果。研究结果表明:IGPC-NADRC控制系统的抗干扰性能好,鲁棒性强,当系统受到外界干扰时该方法的超调量为5.72%,调节时间为44 s,稳定性更佳。工程应用结果表明,采用IGPC-NADRC控制策略后系统的偏差范围比PID控制时的更小,证明了方法的有效性。Aiming at the problem that the existing parameter of coal pulverizing system for coal-fired power units is not stable,multivariate and has big lag,the forecasting model using the algorithm of implicit generalized predictive output was employed,and a nonlinear extended state observer(NESO)was constructed to estimate the existence of disturbances and compensate for them.IGPC-NADRC was designed for coal pulverizing system of thermal power plant control,the internal model structure was simplifed and the system stability was analyzed.In the simulation experiment,the time domain analysis method was used to verify the influence of the key parameters in the controller on the system output,and then the anti-interference experiment and the variable set value experiment were designed.The control effects of IGPC-NADRC and dynamic matrix active disturbance rejection control(ADRC)strategies were compared to those of DMC-ADRC,IGPC-PID control and DMC-PID control strategies.The results show that the IGPC-NADRC control has good anti-interference performance and strong robustness.When the system is disturbed by external interference,the overshoot of the IGPC-NADRC control method is 5.72%,the adjustment time is 44 s,and the stability is better.Engineering application result shows that the error range of IGPC-NADRC control system is smaller than that of PID control,which proves the effectiveness of the method.

关 键 词：隐式广义预测控制 自抗扰控制 煤粉质量分数 时域分析 鲁棒性 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]