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Diagnostic des défauts de réseaux électriques filaires par la réflectométrie

Abstract : This thesis focuses on fault diagnosis of wired electric networks using reflectometry. To develop diagnostic algorithms, we studied the direct problem (numerical simulations of electrical networks) and the inverse problem (determination of certain properties of a network from reflectometry measurements). For the direct problem, we developed a method for the computation of reflection coefficients. This method is based on the successive solving for a Riccati differential equation. We also generalized the BLT equation for the nonuniform electric networks and automated the resolution of this method. The thesis has made two new results concerning the inverse problem. The first result concerns the estimation of lengths and loss coefficients of the branches of a star network via an iterative method. The second focuses on the identification, at least partially, of the branches admittance matrices of a electric network modeled by the equation of BLT. The methodologies and formalisms proposed in this thesis are validated either by numerical simulations or by real measurements.
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Submitted on : Thursday, June 18, 2015 - 11:59:23 AM
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  • HAL Id : tel-01165039, version 1



Mohamed Oumri. Diagnostic des défauts de réseaux électriques filaires par la réflectométrie. Autre [cond-mat.other]. Université Paris Sud - Paris XI, 2014. Français. ⟨NNT : 2014PA112090⟩. ⟨tel-01165039⟩



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