基于负荷前馈与剩余扰动线性自抗扰控制的循环流化床锅炉床温控制

Bed Temperature Control of a Circulating Fluidized Bed Boiler Based on Load Feedforward and Residual-Disturbance Linear Active Disturbance Rejection Control

摘要: 摘要：针对循环流化床锅炉床温大惯性、多扰动及负荷突变偏差问题，建立给煤量—床温与主蒸汽负荷—床温双通道模型，提出负荷前馈与剩余扰动观测相结合的线性自抗扰控制方法。DG410/9.81-II1锅炉验证表明，相较LADRC，所提方法的最大温降、RMSE、IAE和ITAE分别降低10.25%、11.78%、9.02%和4.46%，64次敏感性试验及60组随机摄动未失稳，负荷扰动抑制能力与参数鲁棒性提高。

Abstract: Abstract: To address the large thermal inertia, multiple disturbances, and bed-temperature deviations caused by abrupt load changes in a circulating fluidized bed boiler, a dual-channel model describing the effects of coal feed rate and main steam load on bed temperature is established. A linear active disturbance rejection control method combining load feedforward with residual-disturbance estimation is proposed. Validation using a DG410/9.81-II1 boiler shows that, compared with conventional LADRC, the proposed method reduces the maximum temperature drop, root mean square error (RMSE), integral of absolute error (IAE), and integral of time-weighted absolute error (ITAE) by 10.25%, 11.78%, 9.02%, and 4.46%, respectively. The controller remained stable in all 64 sensitivity tests and 60 sets of random parameter perturbations, indicating improved load-disturbance rejection and parameter robustness.