Multi-leak diagnosis in pipelines based on Extended Kalman Filter

Jorge Alejandro Delgado Aguiñaga (1) , Gildas Besancon (2, 3) , Ofelia Begovich (1) , Carvajal J.E. (1)

1 CINVESTAV - Centro de Investigacion y de Estudios Avanzados del Instituto Politécnico Nacional
2 GIPSA-SYSCO - GIPSA - Systèmes non linéaires et complexité
3 IUF - Institut universitaire de France

A model-based approach to detect and isolate non-concurrent multiple leaks in a pipeline is proposed, only using pressure and flow sensors placed at the pipeline ends. The approach relies on a nonlinear modeling derived from Water–Hammer equations, and related Extended Kalman Filters used to estimate leak coefficients. This extends former results developed for the single leak case, but with the difficulty that the model is modified at each new leak occurrence. A model adaptation strategy is thus proposed, allowing us to monitor indeed each new leak, and no matter where it appears. Experimental results illustrate the performance of the proposed algorithm.

Mots clés: Pipelines; Multiple leaks; Extended Kalman Filter; Fault detection and isolation; Nonlinear observer; Experimental validation

Domaines: Automatique / Robotique

Jorge Alejandro Delgado Aguiñaga, Gildas Besancon, Ofelia Begovich, Carvajal J.E.. Multi-leak diagnosis in pipelines based on Extended Kalman Filter. Control Engineering Practice, 2015, 49, pp.139-148. ⟨10.1016/j.conengprac.2015.10.008⟩. ⟨hal-01240464⟩