基于改进差分进化算法的CFB锅炉主蒸汽压力建模  

Main Steam Pressure Modelling of CFB Boiler Based on Improved Differential Evolution Algorithm

作　　者：印江[1] 袁华保峰 郝海军 王晨光 李锦乾 YIN Jiang;YUAN Huabaofeng;HAO Haijun;WANG Chenguang;LI Jinqian(School of Electric Power and Architecture,Shanxi University,Taiyuan 030031,China;School of Automation and Software,Shanxi University,Taiyuan 030031,China;Shanxi Yuguang Power Generation Co.,Ltd.,Shuozhou 036900,China)

机构地区：[1]山西大学电力与建筑学院,山西太原030031 [2]山西大学自动化与软件学院,山西太原030031 [3]山西昱光发电有限责任公司,山西朔州036900

出　　处：《自动化仪表》2023年第8期43-50,共8页Process Automation Instrumentation

摘　　要：建立准确的主蒸汽压力数学模型对提升循环流化床(CFB)锅炉主蒸汽压力控制系统性能有着实际意义。受现场条件制约,近年来基于数据驱动的闭环建模已趋于实用化。针对模型参数辨识过程寻优速度和精度指标,提出一种引入两个权重系数的改进差分进化(IDE)算法。与传统差分进化算法相比,改进后的算法在模型参数辨识过程中的寻优速度和精度均有提升,辨识所得模型更加准确。该结果证明了改进后算法的稳定性。通过采集山西某电厂350 MW超临界CFB锅炉现场的实际运行数据并进行预处理,将燃料量和汽机阀门开度同时作为输入、主蒸汽压力作为输出,并利用IDE算法寻优得到主蒸汽压力的最佳模型参数。对比结果表明,模型有着更高的拟合度。该研究对350 MW超临界CFB锅炉主蒸汽压力优化控制有一定的指导意义。The establishment of the accurate mathematical model of main steam pressure is of practical significance for improving the performance of the main steam pressure control system in circulating fluidized bed(CFB)boilers.Constrained by the field conditions,the data-driven-based closed-loop modeling has become practical in recent years.An improved differential evolution(IDE)algorithm that introduces two weighting coefficients is proposed for the optimization speed and accuracy index of the model parameter identification process.Compared with the traditional differential evolution algorithm,the improved algorithm improves the optimization speed and accuracy in the model parameter identification process,and the resulting model is more accurate.This result proves the stability of the improved algorithm.By collecting and pre-processing the actual operation data of a 350 MW supercritical CFB boiler in a power plant in Shanxi,the best model parameters for main steam pressure are obtained by using the IDE algorithm optimization with the fuel quantity and the valve opening of the turbine as inputs at the same time and the main steam pressure as the output.Comparison results show that the model has a higher degree of fit.This study is of certain significance for the optimal control of main steam pressure in 350 MW supercritical CFB boilers.

关 键 词：循环流化床 锅炉 主蒸汽压力 闭环建模 改进差分进化算法 权重系数 模型辨识 数据处理 

分 类 号：TH-39[机械工程]