汽油管道调合优化控制方法及半实物仿真实验平台的研究

发布时间：2018-04-10 03:29

本文选题：汽油调合　切入点：优化控制　出处：《辽宁工业大学》2015年硕士论文

【摘要】：汽油调合是炼油厂生产汽油过程中的重要工序，在这个过程中，将各种组分油按照一定的比例和质量指标进行混合，调合成各种牌号的成品油，组分油的各项质量指标直接影响着成品油的质量。汽油调合过程是一种典型的复杂工业过程，具有非线性、多变量等特性。本文以汽油调合过程为研究对象，开展了汽油管道调合优化控制的研究，主要分为优化控制方法、控制系统、半实物仿真实验平台三个方面，，具体内容如下：（1）提出了优化设定层和回路控制层两层结构所组成汽油管道调合优化控制方法，优化设定层包括工艺计算模型和优化算法，前者是通过分析调合过程中的辛烷值和蒸汽压等成份的调合关系，建立汽油调合过程中的调合配比模型；后者通过运用序列二次规划法（SQP）得到配方；底层控制回路则采用PID控制方法来控制底层组分油流量。（2）根据现有的设备条件，结合对象模型，采用西门子S7-300PLC设计并开发汽油管道调合优化控制系统，包括系统硬件的设计和软件的开发。（3）结合S7-300PLC的控制功能、Matlab强大的计算能力、VB的编程功能以及WinCC丰富的界面功能，开发出汽油管道调合优化控制系统的半实物仿真平台，该平台由西门子S7-300PLC控制器、优化设定计算机、监控计算机和模型计算机组成，从而实现了对汽油管道调合优化控制系统的半实物仿真研究，提高了仿真精度，弥补了现场试验的不足。
[Abstract]:Gasoline blending is an important process in the production of gasoline in refineries. In this process, various components of oil are mixed according to a certain proportion and quality index to form various grades of finished oils.The quality index of component oil directly affects the quality of refined oil.Gasoline blending process is a typical complex industrial process with nonlinear and multivariable characteristics.In this paper, the gasoline blending process as the research object, the study of gasoline pipeline blending optimization control, mainly divided into three aspects: optimization control method, control system, hardware-in-the-loop simulation experimental platform, the specific contents are as follows:In this paper, an optimal control method for gasoline pipeline blending is proposed, which consists of two layers: the optimal setting layer and the loop control layer. The optimal setting layer consists of a process calculation model and an optimization algorithm.In the former, the blending ratio model of gasoline blending process is established by analyzing the blending relation between octane number and steam pressure in the blending process, and the formula is obtained by using the sequential quadratic programming method.The bottom control loop adopts PID control method to control the oil flow of the bottom component.According to the existing equipment conditions and combined with the object model, the optimization control system of gasoline pipeline blending is designed and developed by Siemens S7-300PLC, including the design of system hardware and the development of software.In combination with the powerful calculation ability of S7-300PLC and the programming function of VB and the rich interface function of WinCC, the hardware-in-the-loop simulation platform of gasoline pipeline blending optimization control system is developed. The platform is controlled by Siemens S7-300PLC controller.By optimizing the composition of setting computer, monitoring computer and model computer, the hardware-in-the-loop simulation of gasoline pipeline blending optimization control system is realized, and the simulation precision is improved, and the deficiency of field test is made up.
【学位授予单位】：辽宁工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE96;TP273

【参考文献】