流体PVT分析仪指数型压力闭环控制方法  

Exponential Pressure Closed-loop Control Method of Fluid PVT Analyzer

作　　者：王其军 卢发明 许亚辉 王琨 曾治超 魏世泽 WANG Qijun;LU Faming;XU Yahui;WANG Kun;ZENG Zhichao;WEI Shize(Petroleum Engineering School,Southwest Petroleum University,Chengdu 610500,China;Sichuan Northwest Gas Mine,Southwest Oil&Gas Field Branch,CNPC,Mianyang 621709,Sichuan,China;China National Petroleum Corporation Southwest Oil and Gas Field Branch Shonan Gas Mine,Luzhou 646099,Sichuan,China)

机构地区：[1]西南石油大学石油与天然气工程学院,成都610500 [2]中国石油天然气股份有限公司西南油气田分公司川西北气矿,四川绵阳621709 [3]中国石油天然气股份有限公司西南油气田分公司蜀南气矿,四川泸州646099

出　　处：《实验室研究与探索》2022年第9期50-53,共4页Research and Exploration In Laboratory

基　　金：国家自然科学基金面上项目(51979238);西南石油大学自研自制项目(ZY2014015);西南石油大学2021—2023年高等教育教学改革研究项目(X2021JGZDI003)。

摘　　要：提出了用于流体PVT分析仪的一种指数型闭环控制方法。该方法基于控制值与目标值按照指数关系无限逼近的闭环控制思路,即:离目标值较远时,优先速度响应;离目标值较近时,优先精度响应,以实现对目标值快速、精确的自适应闭环控制。实验测试表明,该方法控制更平滑、冲击更小、系统更稳定、目标跟踪更快、控制精度更高,可以弥补经典PID控制方法在非线性控制方面的不足,满足流体PVT分析仪压力闭环控制要求。研究结果对速度、力、位置等物理量的闭环控制也具有一定的参考作用。This paper proposes an“exponential closed-loop control method”based on the closed-loop control idea that the control value and the target value are approximated by an exponential relationship,i.e.,when the target value is far away,the speed response is given priority,and when the target value is close,the accuracy response is given priority,so as to achieve fast and accurate adaptive closed-loop control of the target value.The experimental tests show that the control method is smoother,with less shock.The system is stable,has faster response and higher control accuracy,it can make up the defects of the classical PID control method in nonlinear control,and meet the closed-loop control requirements of fluid PVT analyzer pressure.The research results are also useful for the closed-loop control of physical quantities such as velocity,force and position.

关 键 词：地层流体 流体PVT分析仪 经典PID控制 指数型闭环控制 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]