基于自抗扰控制技术的PVC反应温度控制

PVC Reaction Temperature Control Based on Active Disturbance Rejection Control Technology

聚氯乙烯(Polyvinyl chloride,PVC)是当前世界上应用最广泛的合成材料之一。聚氯乙烯生产的关键是聚合反应过程,PVC聚合反应温度控制精度直接影响产品质量。由于PVC聚合反应过程具有大时滞及时变非线性的特点,传统的PID控制精度通常难以满足生产需要。研究了自抗扰控制技术在PVC反应温度控制中的应用,通过和IMC-PID的控制仿真对比,验证了自抗扰控制技术适应工况变化的能力。针对实际的PVC生产过程,在DCS上进行了自抗扰控制器组态,并应用于实际PVC生产过程。实际控制结果证实了自抗扰控制技术应用于PVC反应温度控制的可行性和有效性。

Polyvinyl chloride(PVC)is currently one of the most popular synthetic resin in the world.The key of the PVC production process is the polymerization reaction.The control precision of the polymerization reaction temperature affects the product quality directly.Due to the large time delay and time-varying nonlinearity in the process of the PVC polymerization reaction temperature control,the control result of the PVC polymerization reaction temperature with the wide applied PID controller is usually not satisfied.In this work,the PVC polymerization reaction temperature control with the active disturbance rejection control(ADRC)technique is studied.The simulation comparison with ADRC and IMC-PID has also been done.The simulation results indicate the ADRC can adapt the change of the operation region.According to the real operation,the ADRC has been configured in the distributed control system(DCS).The application results of the PVC polymerization reaction temperature with the configured ADRC have verified the feasibility and effectiveness of the ADRC.