西安石油大学学报（自然科学版）2024，Vol.39Issue(4)：117-123,7.DOI:10.3969/j.issn.1673-064X.2024.04.016
基于实时组分的天然气流量在线计量方法
Online Measurement Method for Natural Gas Flow-rate Based on Real-time Composition
摘要
Abstract
In the absence of real-time composition data of natural gas,in order to improve the accuracy of ultrasonic flow meters in measuring the volume flow rate of natural gas in standard state,based on the principle of mass conservation and combined with the AGA8 gas property equation,the calculation formulas for the volume flow rate and energy flow rate of standard state natural gas,as well as the evaluation method for cumulative measurement error of the volume flow rate,were determined for different real-time measurement data conditions in the SCADA system.An online measurement software system was developed and applied to 6 ultrasonic flow meters in the onshore measurement terminal of a certain submarine pipeline.Over 150 000 sets of measurement data were obtained in 4 months.The application results show that the maximum relative error for measuring the flow rate of natural gas of fixed component using the soft-ware system is 1.02％,which is greater than the measurement uncertainty of A-level flow meters(0.85％),and the measurement error is directly proportional to the density difference of natural gas of real-time component and fixed component.The relative error is approxi-mately a normal distribution,with a probability of 98.79％for an error between-0.5％and 0.5％.Therefore,the proposed online measurement method has lower measurement accuracy in measuring the flow rate of natural gas of fixed components,which helps to im-prove the measurement accuracy of the volume flow rate of standard state natural gas.关键词
超声波流量计/实时天然气组分/在线计量/计量误差/误差概率分布/能量流量Key words
ultrasonic flowmeter/real-time components of natural gas/on-line measurement/measurement error/error probability distri-bution/energy flow rate分类
能源科技引用本文复制引用
王力,王寿喜,邓传忠,李伟,高翔..基于实时组分的天然气流量在线计量方法[J].西安石油大学学报（自然科学版）,2024,39(4):117-123,7.基金项目
中海石油(中国)有限公司湛江分公司科研项目"湛江分公司南海多气源联网产供气在线仿真与调度决策系统建设(二期)"(CCL2021ZJFN0566) （中国）
