低温多效海水淡化装置中串联容器的液位控制方法  

Level Control for Tanks in Series in Multiple-effect Distillation Desalination Unit

作　　者：黄岩[1] HUANG Yan(Technology Research Center of Seawater Desalination Engineering,China Electronics Engineering Design Institute,Beijing 100142 China)

机构地区：[1]中国电子工程设计院海水淡化技术研发中心,北京100142

出　　处：《自动化技术与应用》2018年第6期6-9,共4页Techniques of Automation and Applications

基　　金：科技部国家科技支撑计划(编号2015BAB08B00);北京市科委资源环境与可持续发展项目(编号Z171100000717009);中共北京市委组织部2016年北京市优秀人才培养资助计划

摘　　要：在低温多效海水淡化装置中,蒸发器为一组首尾串联的容器,每台蒸发器液位都会受到上下游蒸发器液位的影响,PID控制器的参数整定比较困难。本文提出了一种基于内模控制的PID参数整定方法 ,首先对被控对象建立传递函数模型,将模型中的积分环节近似为一阶环节;然后针对对象模型设计内模-PID控制器。该方法过程简单,计算方便,仿真结果表明内模-PID控制器对于设定值的阶跃干扰有着很好的响应,每一台蒸发器的液位和出口流量的波动均在允许的范围内。The evaporators in Multiple-Effect Distillation desalination unit are tanks in series.Because the liquid level in each tank is affect by other tanks,the PID parameters tuning of controllers are difficult.In this paper,a PID parameter tuning method based on IMC(Internal Model Control)is proposed.First,the transfer function model of the object is established,and the integrating process in the model is approximated as a first-order process.Then,the IMC-PID controller is designed for the model.The method has the advantages of simple procedure and calculation.The simulation results show that the system have a good dynamic response with the calculated PID parameters.

关 键 词：海水淡化 液位控制 积分对象 内模控制 PID参数整定 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]