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- Title
Feed Forward Cascade PID Based Predictive Control of the PH Value of Desulfurization Slurry in Thermal Power Units.
- Authors
Shijie Wang; Li Zhang; Peng Wang; Jie Li; Wenqiang Jiang; Bao Liu
- Abstract
Aiming at the problems of large lag and inertia in the PH control system of gypsum wet desulfurization in thermal power units, this paper proposes a cascade multi-step feed forward predictive control strategy based on proportional integral derivative (PID). Firstly, the paper establishes mechanism model through the transfer function of PH value influence factor to ensure a strong correlation between the control system parameters and the PH value; Secondly, based on the traditional PID control strategy, the paper introduces cascade and multi-step feed forward control mechanisms to solve the strong inertia of the control system; Then, the three-step predictive value of SO2 content in raw flue gas based on long short term memory network (LSTM) is introduced as the feed forward value, so as to better eliminate system lag characteristics and track the PH setting value; Finally, the simulation experiment is carried out using the desulfurization data of the plant. The simulation results show that, compared with the traditional PID and cascade PID control strategies, the control strategy proposed in this paper achieves more accurate and stable control of the PH value of desulfurization slurry in thermal power units, and improve the desulfurization efficiency.
- Subjects
SHORT-term memory; LONG-term memory; DESULFURIZATION; CASCADE control; SLURRY
- Publication
IAENG International Journal of Computer Science, 2024, Vol 51, Issue 7, p842
- ISSN
1819-656X
- Publication type
Article