仪表精度对泄漏监测的影响分析

Effect of Instrument Precision on Leakage Detection

在天然气管道输送过程中,受自然因素和人为因素的影响,不可避免地会造成管道泄漏,现代控制技术和数据处理技术正迅速应用到油气管道的泄漏监测系统中。文章介绍了国际上应用较多的实时模型泄漏监测法的泄漏监测数据模型,分析了输气管道仪表精度对泄漏报警和泄漏定位的影响。结果表明,随着瞬态流周期的变化,仪器系统误差会引起计算泄漏点位置的波动,这种波动可通过平均误差计算法加以消除。

This paper introduces a mathematic model of real-time leakage detection method that is widely used in the world, and analyses the effect of precisions of gas pipeline instruments on leakage alarm and leakage locating. It is shown that the variation of instrument systematic error along with transient flow period can induce the shift of calculated leakage location. It can be eliminated by the mean error algorithm.