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Article Dans Une Revue Advances in Water Resources Année : 2007

Two leaks isolation in a pipeline by transient response

Résumé

This paper presents a method for the identi¯cation of two leaks in a pressurized sin- gle pipeline where both transient and static behavior of the °uid in leaks conditions are used to identify the parameters associated to the leaks without requirements of valve perturbation. The procedure is based on a family F of lumped parameters non linear models with same steady state behavior in leaks condition and param- eterized in terms of a known parameter zeq assuming only pressure and °ow rate measurements at the extremes of the line. This model is derived discretizing only the space variable. The key of the method is the automatic selection of the spe- ci¯c family F of models to be identi¯ed using the steady state conditions produced by the leaks. This fact reduces the research interval and the number of unknown parameters simplifying the minimization issue of the error between model and mea- sured data. Considering this family an algorithm combining transient and steady state measurements is presented. The potential of the technique and its robustness with respect to operation point changes after the leaks occurrence are illustrated by simulation using the parameters of a water pilot pipeline of 135m long installed at the UNAM in which the L2 norm of the upstream and downstream flow error is minimized.

Dates et versions

hal-00149849 , version 1 (28-05-2007)

Identifiants

Citer

Cristina Verde, Nancy Visairo, Sylviane Gentil. Two leaks isolation in a pipeline by transient response. Advances in Water Resources, 2007, 30, pp.1711-1721. ⟨10.1016/j.advwatres.2007.01.001⟩. ⟨hal-00149849⟩
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