基于频域稳定性分析的换热网络旁路控制  

Bypass control for heat exchanger networks based on frequency domain stability analysis

作　　者：孙琳[1] 杨政华 罗雄麟[1] SUN Lin;YANG Zheng-hua;LUO Xiong-lin(Research Institute of Automation,China University of Petroleum,Beijing 102249,China)

机构地区：[1]中国石油大学(北京)自动化系

出　　处：《高校化学工程学报》2020年第1期171-181,共11页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金(21676295)

摘　　要：在换热网络的运行过程中,其操作条件时常变化。针对过程系统安全平稳运行的基本要求,基于频域稳定性分析方法,得出影响过程系统动态性能与稳定性的关键点,提出一种换热网络旁路控制系统的设计方法。从频域的角度分析潜在旁路与被控变量之间的耦合关系,采用频域相对增益阵方法实现换热网络的旁路设计。并在此基础上,对设计的控制系统进行控制器参数设计,使换热网络控制系统满足一定的稳定裕度要求。结果表明,基于频域稳定性分析设计的换热网络旁路控制系统满足稳定裕度要求,其阶跃响应的绝对误差积分值较小,系统的动态性能更好。The operating conditions of heat exchanger networks often change during running processes.In order to fulfill the basic requirements of safe and stable operation,the key points affecting the dynamic performance and stability of the system were obtained based on frequency domain stability analysis,and a design of bypass control system was proposed.The interactions of potential bypasses and controlled variables were analyzed from the perspective of the frequency domain,and the design of bypass for heat exchanger networks was realized by frequency domain relative gain array.The controller parameters of the control system were then designed to make heat exchanger networks meet a certain stability margins.Case studies indicate that under the control of the bypass and PID controller parameters based on the stability analysis method in the frequency domain,the dynamic performance of the system is better and the IAE(integral of absolute error)of heat exchange networks is smaller.

关 键 词：换热网络 旁路控制 频域 稳定性 设计 

分 类 号：TQ021.8[化学工程]