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Article

An EKF-Based Method and Experimental Study for Small Leakage Detection and Location in Natural Gas Pipelines

by 1 and 2,*
1
School of Energy and Building Engineering, Harbin University of Commerce, Harbin 150028, China
2
Department of Engineering Technology, College of Technology, University of Houston, Houston, TX 77204, USA
*
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(15), 3193; https://doi.org/10.3390/app9153193
Received: 12 July 2019 / Revised: 1 August 2019 / Accepted: 1 August 2019 / Published: 5 August 2019
Small leaks in natural gas pipelines are hard to detect, and there are few studies on this problem in the literature. In this paper, a method based on the extended Kalman filter (EKF) is proposed to detect and locate small leaks in natural gas pipelines. First, the method of a characteristic line is used to establish a discrete model of transient pipeline flow. At the same time, according to the basic idea of EKF, a leakage rate is distributed to each segment of the discrete model to obtain a model with virtual multi-point leakage. As such, the virtual leakage rate becomes a component of the state variables in the model. Secondly, system noise and measurement noise are considered, and the optimal hydraulic factors such as leakage rate are estimated using EKF. Finally, by using the idea of an equivalent pipeline, the actual leakage rate is calculated and the location of leakage on the pipeline is assessed. Simulation and experimental results show that this method can consistently predict the leakage rate and location and is sensitive to small leakages in a natural gas pipeline. View Full-Text
Keywords: natural gas pipeline; small leaks; pipeline leakage detection; extended Kalman filter natural gas pipeline; small leaks; pipeline leakage detection; extended Kalman filter
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MDPI and ACS Style

Hou, Q.; Zhu, W. An EKF-Based Method and Experimental Study for Small Leakage Detection and Location in Natural Gas Pipelines. Appl. Sci. 2019, 9, 3193. https://doi.org/10.3390/app9153193

AMA Style

Hou Q, Zhu W. An EKF-Based Method and Experimental Study for Small Leakage Detection and Location in Natural Gas Pipelines. Applied Sciences. 2019; 9(15):3193. https://doi.org/10.3390/app9153193

Chicago/Turabian Style

Hou, Qingmin, and Weihang Zhu. 2019. "An EKF-Based Method and Experimental Study for Small Leakage Detection and Location in Natural Gas Pipelines" Applied Sciences 9, no. 15: 3193. https://doi.org/10.3390/app9153193

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