Redundant flow estimation methods for robust hydraulic control in water supply networks

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Title: Redundant flow estimation methods for robust hydraulic control in water supply networks
Authors: Changklom, J
Stoianov, I
Item Type: Journal Article
Abstract: The implementation of robust hydraulic control in water supply networks relies upon the utilisation of redundant flow estimation methods. In this paper, we propose a novel model-based flow estimation method for diaphragm actuated globe valves based on three pressure signals, namely the valve inlet pressure, valve outlet pressure and control chamber pressure (the 3P flow estimation method). The proposed flow estimation method relies upon the accurate determination of a valve stem position based on a force balance analysis for the diaphragm of a valve, the measured pressure differential across a valve and the flow coefficients of a valve (Cv, Kv). A novel stem position estimation model for diaphragm actuated globe valves has been formulated and experimentally validated. The non-linear parameterised valve stem position estimation model results in multiple solutions. We combine advances in signal processing with support vector machine classification to find a correct solution. We compare the proposed 3P flow estimation method with a method, which uses stem position sensor measurements of a valve and two pressure signals. A unique set of experimental data have been acquired for performance validation. We derive uncertainty bounds for the proposed flow estimation method and demonstrate its application for robust pressure control in water supply networks.
Issue Date: 1-Jul-2019
Date of Acceptance: 11-Apr-2019
ISSN: 1464-7141
Publisher: IWA Publishing
Journal / Book Title: Journal of Hydroinformatics
Copyright Statement: This paper is embargoed until 12 months after publication.
Sponsor/Funder: Engineering & Physical Science Research Council (E
Funder's Grant Number: EP/P004229/1
Keywords: Environmental Engineering
0905 Civil Engineering
Publication Status: Accepted
Embargo Date: 2020-07-01
Appears in Collections:Civil and Environmental Engineering

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