针对原油性质变化的常减压先进控制研究与应用  

Advanced process control of CDU aiming to diversity of crude oil

作　　者：吕文祥[1] 摆亮[1] 黄德先[1,2] 江永亨[1] 刘先广 朱朝宾 李占龙 张代欣 

机构地区：[1]清华大学自动化系,北京100084 [2]清华信息科学与技术国家实验室,北京100084 [3]北京清大腾飞公司,北京100084 [4]中国石油锦西石化分公司,辽宁葫芦岛125001

出　　处：《化工学报》2009年第10期2522-2528,共7页CIESC Journal

基　　金：国家高技术研究发展计划项目(2007AA04Z193);国家自然科学基金项目(60574072);国家重点基础研究计划项目(2002CB3122002)~~

摘　　要：针对原油性质变化对常减压装置操作造成的巨大困难,提出了一种稳定原油性质和引入原油性质参数到软测量和控制模型的先进控制综合解决方案。一方面,对待混炼的多种原油进行调度和掺炼比优化,使实际进入常减压装置进行炼制的调合原油性质相对稳定,装置操作参数变化较小,减少工作点大幅变化过程中所产生的波动。另一方面,针对仍然存在的原油性质小幅度变化,在软测量和预测控制建模中引入反映原油性质的馏程参数,克服原油性质变化所引起的扰动。现场实际装置的应用结果说明了此综合方案的有效性。Aiming at the great difficulty in crude oil unit （CDU） operation for the diversity of crude oil, an advanced process control comprehensive scheme is presented, which composed of both decreasing the property variety of crude oil feed-in and introducing parameters reflecting property into soft sensor and controller. By scheduling and blending the optimization of multiple crude oils to be refined, the blended crude oil feed-in has relatively steady properties and has small influence on parameters of the unit operation, hence the disturbance from the change in operating point is decreased remarkably. On the other hand, for the remaining small property variety of blended crude oil, the parameters reflecting property are introduced to soft sensor calculation and advanced process controller based on model predictive control to overcome the disturbance of property variety. By scheduling and blending optimization, the parameter varieties of unit operation are small, which makes it possible that the soft sensor and predictive control using linear approximate model have a great performance. Application on a CDU with multiple crude oils shows the validity of the comprehensive scheme.

关 键 词：常减压装置 原油混炼优化 软测量 模型预测控制 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]