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针对循环流化床锅炉(CFBB)燃烧系统的强耦合和大延迟问题,采用相对增益的方法分析几种工况下的耦合性,并采用了主蒸汽压力送风量通道解耦策略。自抗扰控制器(ADRC)经过改进被应用在该燃烧系统,并将仿真结果与神经网络以及PID控制方法的结果进行了比较。仿真结果表明:ADRC在解藕、调节时间上均优于神经网络以及传统PID方法;在各种工况以及增加外扰情况下,该控制方案具有很好的适应性和鲁棒性,较好地解决了该系统强耦合、大延迟的控制难点。
Aiming at the strong coupling and large delay of the CFBB combustion system, the relative gain method is used to analyze the coupling under several conditions and the main steam pressure air supply channel decoupling strategy is adopted. The ADRC was modified for use in the combustion system and the simulation results were compared with the results of the neural network and PID control methods. The simulation results show that ADRC is superior to neural network and traditional PID method in decoupling and adjusting time. The control scheme has good adaptability and robustness under various working conditions and increasing external disturbance, which is better To solve the system strong coupling, large delay control difficult.