摘要
针对聚氯乙烯生产中温度控制精度不足问题,提出了基于串级控制的复合调控策略。通过构建主副回路分工控制系统,结合改进型三维模糊PID算法与前馈-反馈协同机制,有效解决了反应釜非线性时变、多源扰动导致的温控偏差问题。仿真结果表明:系统在模型参数±25%摄动下,仍能保持温度控制精度标准差为0.13℃,调节时间缩短至18.3 min,单位产量能耗降至0.91 kW·h/kg,满足GB/T 5761—2018标准要求。
A composite control strategy based on cascade control is proposed to address the issue of insufficient temperature control accuracy in polyvinyl chloride production.By constructing a main and auxiliary circuit division control system,combined with an improved three-dimensional fuzzy PID algorithm and a feedforward feedback collaborative mechanism,the temperature control deviation problem caused by nonlinear time-varying and multi-source disturbances in the reaction kettle has been effectively solved.The simulation results show that the system can still maintain a temperature control accuracy standard deviation of 0.13℃under±25%perturbation of model parameters,shorten the adjustment time to 18.3 minutes,and reduce the energy consumption per unit output to 0.91 kW·h/kg,meeting the requirements of GB/T 5761-2018 standard.
作者
刘慧超
崔超超
扈敬杰
Liu Huichao;Cui Chaochao;Hu Jingjie(Shandong Hongxu Chemical Co.,Ltd.,Dongying Shandong 257200,China)
出处
《山西化工》
2025年第9期113-115,共3页
Shanxi Chemical Industry
关键词
串级控制系统
模糊PID控制
聚氯乙烯聚合
cascade control system
fuzzy PID control
polyvinyl chloride polymerization
