基于自适应前馈控制的SCR烟气脱硝系统分析

Analysis of SCR Flue Gas Denitrification System Based on Adaptive Feedforward Control

为了响应国家的环保要求,选择性催化还原(Selective Catalytic Reduction,SCR)烟气脱硝系统得到了广泛应用。大部分燃煤电厂都使用了SCR烟气脱硝技术,由于SCR烟气脱硝系统普遍存在反应时间较长、控制滞后、时变非线性等特点,本文提出了基于自适应前馈控制方法。利用现场实际运行数据,通过仿真实验对该方法进行验证,实验结果表明,与传统的PID控制方法相比,该方法在抗扰动能力、跟踪设定值方面均优于常规控制方案。

In order to respond to national environmental protection requirements,In order to meet the national environmental requirements,selective catalytic reduction(SCR)flue gas denitrif ication system has been widely used.Most coal-f ired power plants use SCR Flue Gas Denitrif ication Technology.Because SCR Flue gas denitrif ication system has the characteristics of long reaction time,control lag and timevarying nonlinearity,this paper proposes an adaptive feedforward control method.The simulation results show that compared with the traditional PID control method,this method has better anti disturbance ability and tracking set value than the conventional control scheme.