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Drinking Water Engineering and Science An interactive open-access journal

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https://doi.org/10.5194/dwes-2017-18
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
06 Jun 2017
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Drinking Water Engineering and Science (DWES).
Real-Time Hydraulic Interval State Estimation for Water Transport Networks: a Case Study
Stelios G. Vrachimis, Demetrios G. Eliades, and Marios M. Polycarpou KIOS Research Center for Intelligent Systems and Networks, Department of Electrical and Computer Engineering, University of Cyprus, Nicosia, Cyprus
Abstract. Hydraulic state estimation in water distribution networks is the task of estimating water flows and pressures in the pipes and nodes of the network based on some sensor measurements. This requires a model of the network, as well as knowledge of demand outflow and tank water levels. Due to modeling and measurement uncertainty, standard state-estimation may result in inaccurate hydraulic estimates without any measure of the estimation error. This paper describes a methodology for generating hydraulic state bounding estimates based on interval bounds on the parametric and measurement uncertainties. The estimation error bounds provided by this method can be applied to estimate the unaccounted-for water in water distribution networks. As a case study, the method is applied to a transport network in Cyprus, using actual data in real-time.

Citation: Vrachimis, S. G., Eliades, D. G., and Polycarpou, M. M.: Real-Time Hydraulic Interval State Estimation for Water Transport Networks: a Case Study, Drink. Water Eng. Sci. Discuss., https://doi.org/10.5194/dwes-2017-18, in review, 2017.
Stelios G. Vrachimis et al.
Stelios G. Vrachimis et al.
Stelios G. Vrachimis et al.

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Short summary
Using real-time uncertain measurements from a real water transport network, the proposed Iterative Hydraulic Interval State Estimation algorithm generates bounds on hydraulic states, by taking into account the measurement uncertainty and modeling uncertainty in the form of uncertain pipe parameters. The applicability of this methodology was demonstrated by using it to estimate the unaccounted-for water in the network. This methodology can be used as a tool for fault-detection in water networks.
Using real-time uncertain measurements from a real water transport network, the proposed...
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