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Leakage detection and localization in water distribution systems: A model invalidation approach
Control Engineering Practice ( IF 4.9 ) Pub Date : 2021-02-24 , DOI: 10.1016/j.conengprac.2021.104755
Stelios G. Vrachimis , Stelios Timotheou , Demetrios G. Eliades , Marios M. Polycarpou

Model-based methodologies can assist in addressing the challenging problem of leakage detection and localization in water distribution systems. However, this is not trivial due to inherent non-linearities and parametric uncertainties. Most importantly, due to the small number of available sensor measurements compared to the number of system states, the inverse problem for estimating leakages is highly under-determined. In this work, the utilization of a priori available information about the system is proposed to formulate a hydraulic model of the system in its non-linear form in which uncertainties are modeled by intervals defined by a lower and upper bound. A novel optimization-based methodology then utilizes pressure and flow measurements to perform leakage detection through model-invalidation. A modification of the optimization algorithm is activated in the case of a detection to refine possible leak locations and retain only the ones that can be explained by the interval model and available measurements from multiple time-steps. The proposed methodology is demonstrated on a benchmark network and evaluated using a leakage diagnosis benchmark dataset.



中文翻译:

配水系统中的泄漏检测和定位:模型失效方法

基于模型的方法可以帮助解决供水系统中泄漏检测和定位的难题。然而,由于固有的非线性和参数不确定性,这并非不平凡。最重要的是,由于与系统状态数量相比,可用的传感器测量数量少,因此估计泄漏的逆问题非常不确定。在这项工作中,先验的利用提出了有关系统的可用信息,以非线性形式制定系统的水力模型,其中不确定性通过上下限定义的间隔进行建模。然后,一种基于优化的新颖方法论利用压力和流量测量值通过模型失效执行泄漏检测。在检测的情况下激活对优化算法的修改,以细化可能的泄漏位置,并仅保留可以由间隔模型和多个时间步长中的可用测量值解释的泄漏位置。在基准网络上演示了所建议的方法,并使用泄漏诊断基准数据集对其进行了评估。

更新日期:2021-02-24
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