Research on Leakage Detection and Analysis of Leakage Point in the Gas Pipeline System

Zhao Yang, Mingliang Liu, Min Shao, Yingjie Ji

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DOI: 10.4236/ojsst.2011.13010                

Abstract

Recently, with large-scale use of natural gas and massive constructions of gas pipelines, more and more public concern is focused on pipeline leakage. The leakage caused by holes on gas pipelines generates economic losses to gas companies and causes risks to the environment and sometimes accidents. In order to detect and locate pipeline rupture immediately, the leakage detection method plays a key role in the overall integrity management in the pipeline system. One of the most important applications of transient simulation is dynamic leakage detection. A leakage detection model and the solution were proposed based on the three conservation laws in hydromechanics and the state equation, which includes transient simulation model and volume balance model. Dynamic parameters involved in the model such as pressure, flow and temperature can be acquired through SCADA (Supervisory Control And Data Acquisition) system. By analyzing the factors influencing leakage position, we came to a conclusion that leakage and outlet pressure are more important parameters compared to the coefficient of frictional resistance and pipeline diameter. The more leakage increases, the closer leakage point approaches pipeline outlet. Leakage location is closer to outlet when pipeline outlet pressure becomes bigger. Experiments were also carried out according to leakage percentage.

Keywords

Leakage Detection, Transient Simulation, Leakage Location, SCADA

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	C. Sandberg, J. Holmes, K. McCoy and H. Koppitsch, “The Application of a Continuous Leak Detection System to Pipelines and Associated Equipment,” IEEE Transac- tions on Industries Application, Vol. 25, No. 5, 1989, pp. 906-909. doi:10.1109/28.41257
[2]	F. Kenya, M. Reiko, K. Akira, S. Hitoshi and K. Ichiro, “Gas Pipeline Leak Detection System Using the Online Simulation Method,” Computers and Chemical Engineer- ing, Vol. 24, No. 2-7, 2000, pp. 453-456. doi:10.1016/S0098-1354(00)00442-7
[3]	RELI, “A Review of Pipeline Leak Detection Methods,” REL Instrumentation Project Report, Shell International Exploration and Production Limited, London, 1997.
[4]	D. Scott, “API Document for Leak Detection,” Oil and Gas Journal, Petroleum News, Tulsa, 1999.
[5]	X. J. Zhang, “Statistical Leak Detection in Gas and Liquid Pipeline,” Piepes & Pipelines International, Vol. 38, No. 4, 1993, pp. 20-26.
[6]	E. B. Liu, S. B. Peng and C. J. Li, “Discussion of Modern Pipeline Leak Detection Techniques,” Pipeline Techni- que and Equipment, Vol. 5, 2004, pp. 17-19.
[7]	K. E. Abhulimen and A. A. Susu, “Modelling Complex Pipeline Network Leak Detection Systems,” Process Safety and Environmental Protection, Vol. 85, No. 6, 2004, pp. 579-598. doi:10.1205/psep06069
[8]	A. J. O. Andrzej and C. Maciej, “Comparison of Isothermal and Non-Isothermal Pipeline Gas Flow Models,” Chemical Engineering Journal, Vol. 81, No. 1-3, 2000, pp. 41-51.
[9]	Z. Yang, “Theoretical Research and Application of Steady and Transient Simulation of Gas Network,” Natural Gas Industry Journal, Vol. 26, No. 4, 2006, pp. 105-108.
[10]	X. K. Xing, “A Simulation Method of Leakage Detection in Product Pipeline,” Pipeline Technique and Equipment, Vol. 3, 2000, pp. 12-14.
[11]	Y. J. Li, “Design and Practice of Transmission and Distribution System,” China Construction Industry Press, Beijing, 2007, pp. 152-153.
[12]	B. Van Hieu, S. Choi, Y.Uk Kim, Y. Park and T. Jeong “Wireless Transmission of Acoustic Emission Signals for Real-Time Monitoring of Leakage in Underground Pipes”, KSCE Journal of Civil Engineering, Vol. 15, No. 5, 2011, pp. 805-812. doi:10.1007/s12205-011-0899-0
[13]	Z. Yang, Z. Xiong and M. Shao. “A New Method of Leak Location for the Natural Gas Pipeline Based on Wavelet Analysis,” Energy, Vol. 35, No. 9, 2010, pp. 3814- 3820. doi:10.1016/j.energy.2010.05.034
[14]	S. L. Wang and H. J. Zhao, “Design and Management of Gas Pipeline,” Chemical Industry Press, Beijing, 2006, pp. 101-103
[15]	A. S. Relnaldo, M. B. Clsudio, L. C. Sandra, J. A. F. R. Pereira, “Pressure Wave Behavior and Leak Detection in Pipeline,” European Symposium on Computer Aided Pro- cess Engineering, Vol. 20, Supplement 1, 1996, pp. 491- 496.