Diameter influence in real-time leak detection and isolation algorithms for plastic pipelines
Résumé
This paper shows the influence of pipeline diameters, on Leak Detection and Isolation. Nowdays, there are many publications, which deal with leak isolation, by using Model- Based approach. Those methods require accurate parameters to isolate the leak. In general, if the parameters are not correctly known, the leak isolation fails, and using parameter values provided by the supplier may be misleading. In the present paper, it is pointed out how a small variation on the diameter parameter can cause considerable variations in the so-called Equivalent Straight Length, and consequently lead to bad leak isolation. Difference between nominal diameter and internal diameter is presented as well as its impact on the LDI algorithm. In this case, a LDI system based on an Extended Kalman Filter is implemented in real-time to illustrate the performance results using both diameters. Finally, the results are discussed.