火电站球磨机制粉系统的自抗扰控制

Automatic disturbance rejection control for power plant ball mill

将自抗扰控制器(ADRC)应用到火电站球磨机制粉系统中,较好地解决了该系统强耦合、大迟延的控制难点。在耦合回路上与反标架正规化(RFN)方法进行比较,在具有延迟特性的回路上与SMITH预估补偿方法进行比较。仿真结果显示,ADRC在相应回路上的控制品质与这两种方法相当,并且对模型的不确定性和各种外扰具有更强的适应性和鲁棒性。ADRC在球磨机制粉系统上的应用,可以提高该系统的控制品质。

An automatic disturbance rejection controller (ADRC) was used in a power plant ball mill to control instabilities due to the strong coupling and the large time delay. A numerical simulation was used to compare the ADRC with the reservedframe normalization method in the coupling loops and the SMITH predictive compensation method in the timedelay loop. The results demonstrated that the ADRC control performance was similar to a combination of the other two methods but that ADRC was more robust with model uncertainties and disturbances. Therefore, the ADRC will improve control of a ball mill. 