天然气超声流量计送检流程优化方法

Method for optimizing the delivery process of natural gas ultrasonic flowmeters for verification

【目的】天然气超声流量计送检在“送”的流程上未定量,对上检验台前的排产排序过程也暂无相关规定,导致“送”的计划与“检”的排产存在矛盾,亟需统筹解决“送”与“检”的动态协同规划问题。【方法】基于超声流量计“送检使管网价值最大化,检定后管网风险最小化”的衡量准则,选取国家管网集团某管道分公司为例,提出送检检定优化与排产智能决策的方法:通过数字化转型,统计分析了对传统超声流量计送检过程产生干扰的计划标准、不确定性、检定优先级的3种影响因素;结合超声流量计运行、维修及检定检修(简称运检维)的特点,以流程为驱动,开展数据挖掘、柔性管理及运维生效模式分析,划分流量计服役生命周期,优化主、备用流量计的匹配性,并给出年度送检计划时间确认方法;基于生命周期模式,在检定排产环节进行动态规划。【结果】结果表明:检定优先级可由输气收益价值与证书超期风险进行重塑,对于互为主、备的流量计,待检流量计的检定价值与风险成本分别由正在使用的流量计在一定周期内的输气收益价值、证书超期风险确定,约束条件则根据检定中心能力进行调整。【结论】以检定排产的天然气超声流量计动态规划统筹运检维优化方法,有助于抵御不确定风险、降低检定负荷、提高计量安全,为天然气贸易计量与管网输损管控提供可靠性保障。(图3,表4,参21)

[Objective]The delivery process of natural gas ultrasonic flowmeters for verification is not quantitative,and there are no relevant regulations on the scheduling and sequencing process before the flowmeters are put onto the inspection bench,resulting in contradictions between the“delivery”plan and the“verification”schedule.It is urgent to address the dynamic collaborative planning of“delivery”and“verification”.[Methods]Based on the criterion of“maximizing the value of pipeline network through ultrasonic flowmeter verification and minimizing the risk of pipeline network after ultrasonic flowmeter verification”,a pipeline branch company of PipeChina was selected as an example to propose a method for optimizing delivery for verification and intelligent decision-making on verification scheduling.Through digital transformation,three influencing factors of traditional management,i.e.planning standard,uncertainty,and verification priority,were statistically analyzed.Driven by process,data mining,flexible management,and analysis of operation and maintenance effectiveness mode were carried out based on the characteristics of ultrasonic flowmeter operation,maintenance and verification.The service life cycles of flowmeters were defined.The matching between active and standby flowmeters was optimized,and the time confirmation method for the annual delivery plan was proposed.Based on the life cycle mode,dynamic planning was conducted during the verification scheduling.[Results]The results show that the verification priority can be redefined by gas transmission benefit value and certificate expiration risk.For mutually active and standby flowmeters,the verification value and the risk cost of the flowmeter to be verified are respectively determined by the gas transmission benefit value and the certificate expiration risk of the flowmeter in service within a certain period,and the constraint conditions are adjusted according to the capacity of the verification center.[Conclusion]The optimized method of the dynamic overall planning of operation,verification,and maintenance of natural gas ultrasonic flowmeters based on verification scheduling is conducive to resisting uncertain risks,reducing verification load,and improving metering safety.It provides technical support for gas commercial metering and pipeline transmission loss control.(3 Figures,4 Tables,21 References)