基于双率融合的水下化学药剂注入计量阀的流量计量方法  

Flow Measurement Method for Underwater Chemical Injection Based on Dual-rate Fusion

作　　者：孙钦 安维峥 吴露 左信[2] 徐世江 岳元龙[2] SUN Qin;AN Wei-zheng;WU Lu;ZUO Xin;XU Shi-jiang;YUE Yuan-long(CNOOC Institute Co.,Ltd.;College of Information Science and Engineering,China University of Petroleum(Beijing))

机构地区：[1]中海油研究总院有限责任公司 [2]中国石油大学(北京)信息科学与工程学院

出　　处：《化工自动化及仪表》2023年第2期175-180,共6页Control and Instruments in Chemical Industry

摘　　要：为了提高水下油气田生产化学药剂注入计量阀的可靠性,防止出现计量不准确甚至无法计量的情况,提出流量计与辅助流量计量的双冗余计量方法,通过数据融合方式实时整合流量计和辅助流量计量流量,输出高精度的化学药剂流量。针对流量计和辅助流量计量的采样速率不同且采样速率之比为正有理数的情况,提出一种分布式状态估计融合算法,首先建立每种计量方式的状态空间模型;然后将两种计量方式的观测信息采用分布式融合结构进行融合,进而将双率数据融合问题转换为同速率数据融合问题;最后的仿真结果表明:基于本算法获得的最高采样率下的状态估计值优于单一计量方式的状态估计值,算法具有很好的可行性、实时性和有效性。For purpose of improving reliability of the metering valve in subsea chemical injection and preventing both inaccuracy and unmeasurable operation there, a dual redundant metering method was proposed, which has the flowmeter and auxiliary flow metering flow integrated at real time through data fusion to output high-accuracy chemical flow;meanwhile, a distributed state estimation fusion algorithm was proposed, in which, having the state space model of each metering method established and the observations of the two metering methods fused with a distributed fusion structure, as well as the dual-rate data fusion problem converted into a same-rate data fusion problem. Simulation results show that, the state estimates obtained based on this algorithm at the highest sampling rate outperforms that with a single measurement and this algorithm has better feasibility, real-time performance and validity.

关 键 词：双冗余计量 水下生产系统 流量 数据融合 双率 分布式状态估计 KALMAN滤波 

分 类 号：TP214[自动化与计算机技术—检测技术与自动化装置]