Leak Isolation in Pressurized Pipelines using an Interpolation Function to approximate the Fitting Losses

13th European Workshop on Advanced Control and Diagnosis

Badillo-Olvera, A.^1 ; Begovich, O.^1 ; Peréz-González, A.^1

CINVESTAV-IPN, Unit Guadalajara, Av. Del Bosque No. 1145, Col. El Bajío, Zapopan, Jalisco, Mexico^1

关键词: Complete solutions;    Different pressures;    Interpolation function;    Pipe-line systems;    Polynomial interpolation functions;    Real coordinates;    Straight geometries;    Virtual modeling;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/783/1/012012/pdf
DOI  :  10.1088/1742-6596/783/1/012012

来源: IOP

【 摘 要 】

The present paper is motivated by the purpose of detection and isolation of a single leak considering the Fault Model Approach (FMA) focused on pipelines with changes in their geometry. These changes generate a different pressure drop that those produced by the friction, this phenomenon is a common scenario in real pipeline systems. The problem arises, since the dynamical model of the fluid in a pipeline only considers straight geometries without fittings. In order to address this situation, several papers work with a virtual model of a pipeline that generates a equivalent straight length, thus, friction produced by the fittings is taking into account. However, when this method is applied, the leak is isolated in a virtual length, which for practical reasons does not represent a complete solution. This research proposes as a solution to the problem of leak isolation in a virtual length, the use of a polynomial interpolation function in order to approximate the conversion of the virtual position to a real-coordinates value. Experimental results in a real prototype are shown, concluding that the proposed methodology has a good performance.