Integrated Intelligent Energy ›› 2023, Vol. 45 ›› Issue (8): 18-25.doi: 10.3969/j.issn.2097-0706.2023.08.003

• Optimal Operation and Control • Previous Articles     Next Articles

Modified active disturbance rejection control on the post-combustion CO2 capture system

LI Pengzhen, JIA Bingke, LIU Yanhong, WU Zhenlong*()   

  1. School of Electrical and Information Engineering, Zhengzhou University, Zhengzhou 450001, China
  • Received:2023-05-08 Revised:2023-07-11 Published:2023-08-25
  • Supported by:
    National Natural Science Foundation of China(52106030);Open Fund of the State Key Laboratory of Electrical Power System(SKLD21KM14);Zhengzhou University Professor Team for Enterprise Innovation-Driven Development Project under Grant(JSZLQY2022016)

Abstract:

With the proposal of "dual carbon" target, the post-combustion carbon dioxide capture system has attracted wide attention, and its control has become a hot issue in academia. Due to the disturbance of flue gas flow, traditional controllers cannot satisfy the systems' requirement on flexible CO2 capture. To make up for this shortcoming, a modified active disturbance rejection control(MADRC) method is proposed for post-combustion carbon dioxide capture systems. This control method modifies the linear active disturbance rejection control and introduces compensation function, improving the tracking and disturbance rejection ability of the carbon capture system. In addition, comparative simulations and Monte Carlo simulation experiments were conducted on a CO2 capture system under different control strategies. At the capture rate set value of 88%, 96% and 90%, respectively, the MADRC was able to stabilize the system in a short time,which was about 125 s faster than that of active disturbance rejection control,and about 800 s faster than that of traditional PID control, indicating that the designed controller has good dynamic performance. Under the flue gas flow disturbance, the proposed controller can quickly suppress the disturbance, and according to Monte Carlo simulation results, the IAE and ISE indexes of the proposed controller are smaller than those of the active disturbance rejection controller and the traditional PID controller, indicating that the proposed controller has a strong robustness and anti-disturbance capability, verifying the effectiveness of the controller.

Key words: post-combustion CO2 capture system, modified active disturbance rejection control, Monte Carlo simulation, carbon capture, utilization and storage

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