基于瞬变流法的管道泄漏定位研究

计算机工程与应用 ›› 2015, Vol. 51 ›› Issue (19): 255-259.

基于瞬变流法的管道泄漏定位研究

康宪芝1，李健1，张宇1，王伟魁1，陈瑞东2

1.天津大学精密测试技术与仪器国家重点实验室，天津 300072
2.中石油秦皇岛输油气分公司，河北秦皇岛 066200

出版日期:2015-09-30 发布日期:2015-10-13

Research on pipeline leak location based on transient flow method

KANG Xianzhi1, LI Jian1, ZHANG Yu1, WANG Weikui1, CHEN Ruidong2

1.State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China
2.China National Petroleum Corporation Qinhuangdao Company, Qinhuangdao, Hebei 066200, China

Online:2015-09-30 Published:2015-10-13

摘要/Abstract

摘要： 管道系统的微小泄漏会影响瞬变压力波的波形和衰减特性。用Flowmaster流体仿真软件建立了管道模型，控制阀门小开度快速关闭，使管道内部产生瞬变流动，用短时傅里叶变换对管道泄漏发生前后的压力波信号进行时频分析，提取出前三次谐波分量的归一化幅值，通过指数拟合得到有无泄漏时各谐波分量幅值的衰减率，计算不同谐波分量泄漏衰减率的比值对管道泄漏进行定位。结果表明，用该方法提取的谐波分量可以准确地计算出各次谐波的衰减率，从而提高了泄漏的定位精度并能够检测到0.17%的微小泄漏。

关键词: 管道系统, 泄漏定位, 瞬变流, 时频分析

Abstract: The minor leaks of pipeline system will affect transient waveforms and its attenuation characteristics. A pipeline model is built by using fluid simulation software Flowmaster. Short-time Fourier transform is used to analyze the pressure signals in time-frequency domain, which are generated by closing the valve partially in a short time for both leak and no-leak case. Damping factors of the first three harmonic components extracted from the time-frequency analysis results are calculated by exponential fitting. The leak position is obtained by calculating the ratios of leak-induced damping rates. The results show that the harmonic components extracted from the time-frequency analysis results can be used to exactly calculate the damping rates, which can improve the accuracy of leak location. The leakage can be as small as 0.17%.

Key words: pipeline systems, leak location, transient flow, time-frequency analysis

康宪芝1，李健1，张宇1，王伟魁1，陈瑞东2. 基于瞬变流法的管道泄漏定位研究[J]. 计算机工程与应用, 2015, 51(19): 255-259.

KANG Xianzhi1, LI Jian1, ZHANG Yu1, WANG Weikui1, CHEN Ruidong2. Research on pipeline leak location based on transient flow method[J]. Computer Engineering and Applications, 2015, 51(19): 255-259.

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