基于改进自抗扰控制和数据驱动的脱硝系统设计及应用

Modified ADRC and data-driven for the denitration system design with its application

中文关键词  脱硝系统  改进自抗扰控制  数据驱动  前馈控制  相关性分析

英文关键词  denitration system  modified active disturbance rejection  data-driven  feedforward control  correlation analysis

中文摘要

      具有多源扰动、强非线性、大滞后等特性的燃煤机组脱硝系统一直面临着如何提高控制品质的挑战. 为提 高脱硝系统的跟踪性能和抗干扰性能, 本文提出了一种结合改进自抗扰控制与前馈设计的复合控制策略, 并在 330 MW亚临界机组的脱硝系统中进行了成功应用. 首先, 通过分析改进自抗扰控制参数对控制效果的影响, 提出 了一种适用于脱硝系统的实用参数整定方法, 并利用数据驱动的方法, 通过扰动量的相关性分析设计合理的前馈控 制策略. 现场运行数据表明, 提出的复合控制策略具有更强的扰动抑制能力和消除反应器两侧出口浓度偏差的能 力, 显示了很强的应用潜力.

英文摘要

      The denitration systems of coal-fired units are facing many control challenges, which have dynamic characteristics such as multi-source disturbance, strong nonlinearity and large hysteresis. In order to improve the tracking performance and disturbance rejection performance of the denitration systems, this paper proposes a composite control strategy combining modified active disturbance rejection control (MADRC) and feedforward control, and the proposed hybrid control strategy is applied to the denitration systems of a 330MW subcritical unit successfully. By analyzing the influence of MADRC parameters on the control performance, a practical parameter tuning method is summarized which is suitable for the denitration system, and then a reasonable feedforward control strategy is designed through the correlation analysis for related disturbance factors based on the data-driven method. The field running data show that the proposed hybrid control strategy has stronger disturbance rejection ability. Besides, it can also effectively eliminate the concentration deviation at the outlet of both sides of the reactor. The successful application shows strong industrial application potential.