Two-Tiered Sensor Placement for Large Water Distribution Network Models

2013 ◽  
Vol 19 (4) ◽  
pp. 465-473 ◽  
Author(s):  
Katherine A. Klise ◽  
Cynthia A. Phillips ◽  
Robert J. Janke
Keyword(s):  
Water Distribution ◽  
Distribution Network ◽  
Sensor Placement ◽  
Network Models ◽  
Water Distribution Network ◽  
Large Water

scholarly journals Online simplification of water distribution network models for optimal scheduling

2013 ◽  
Vol 15 (3) ◽  
pp. 652-665 ◽  
Author(s):  
Daniel Paluszczyszyn ◽  
Piotr Skworcow ◽  
Bogumil Ulanicki
Keyword(s):  
Distribution Systems ◽  
Water Distribution ◽  
Distribution Network ◽  
Network Models ◽  
Water Distribution Network ◽  
Simplified Model ◽  
Reduced Model ◽  
Water Network ◽  
Pump Speed ◽  
Online Optimisation

This paper presents an implementation of an extended simplification algorithm of water distribution network models for the purpose of inclusion in the online optimisation strategy for energy and leakage management in water distribution systems. Whereas the previously proposed reduced model represented accurately the original hydraulic water network characteristics, the energy distribution in the simplified model was not preserved. This could cause a situation where the pump speed required to satisfy specified minimum pressure constraints is different for the reduced model and the original model. This problem has been identified, and an appropriate modification to the simplification algorithm has been introduced. The idea comprises introduction of the energy audit of the water network and the calculation of new minimum service pressure constraints for the simplified model. The approach allows the preservation of both hydraulic and energetic characteristics of the original water network and therefore meets the requirements of the online optimisation strategy. Suitability of the proposed approach is evaluated via a case study. The modern parallel programming implementation allowed water network models consisting of several thousand elements to be reduced within 2 min with an average relative accuracy of less than 2% in terms of tanks flows.

scholarly journals Equivalent hydraulic resistance to simulate pipes subject to diffuse outflows

2011 ◽  
Vol 14 (1) ◽  
pp. 65-74 ◽  
Author(s):  
M. Ferrante ◽  
E. Todini ◽  
C. Massari ◽  
B. Brunone ◽  
S. Meniconi
Keyword(s):  
Hydraulic Resistance ◽  
Distribution System ◽  
Water Distribution ◽  
Water Distribution System ◽  
Distribution Network ◽  
Network Models ◽  
Water Distribution Network ◽  
Simulation Models ◽  
Gradient Algorithm ◽  
Present Generation

In water distribution network simulation models, pipes subject to diffuse outflow, either due to connections or to distributed demand or to leaks along their length, are generally converted into pipe elements only subject to lumped demand at their ending nodes. This approximation, which disregards the flow variation along the pipes, generates a loss of axial momentum, which is not correctly taken into account in the present generation of water distribution network models. In this paper a correction to the lumped demand approximation is provided and this equivalence is analyzed within the framework of the Global Gradient Algorithm. This is obtained through a correction of the pipe hydraulic resistance; this approach has proven to be more effective than the use of an asymmetrical lumped demand of the total distributed outflow at the pipe ending nodes. In order to assess the effect of the introduced correction, an application to a simple water distribution system is finally provided.

scholarly journals Identification of Measurement Points for Calibration of Water Distribution Network Models

2014 ◽  
Vol 89 ◽  
pp. 693-701 ◽  
Author(s):  
A. Fiorini Morosini ◽  
F. Costanzo ◽  
P. Veltri ◽  
D. Savić
Keyword(s):  
Water Distribution ◽  
Distribution Network ◽  
Network Models ◽  
Water Distribution Network

scholarly journals Sensor Placement in Water Distribution Networks based on Spectral Algorithms

10.29007/whzr ◽  
2018 ◽  
Author(s):  
Armando Di Nardo ◽  
Carlo Giudicianni ◽  
Roberto Greco ◽  
Manuel Herrera ◽  
Giovanni Francesco Santonastaso ◽  
...  
Keyword(s):  
Water Distribution ◽  
Distribution Network ◽  
Sensor Placement ◽  
Water Distribution Network ◽  
Distribution Networks ◽  
Data Availability ◽  
Water Distribution Networks ◽  
Monitoring And Control ◽  
Network Graph ◽  
Spectral Techniques

Installing an efficient monitoring and control sensor system provides the possibility to carry out main tasks on Water Distribution Networks (WDNs) management and protection. Given the WDNs complexity, efficient numerical techniques are needed to support optimal monitoring system design. Generally, it is appropriate to locate sensors at highly connected places in the WDN with water flow reaching several parts of the network. This paper introduces a general method to support water utilities on the decision making process for an efficient water system monitoring. The proposal is based on graph spectral techniques that take advantage on spectrum properties of the adjacency matrix of the water distribution network graph. It is consequently created a novel tool-set of graph spectral techniques adapted to improve the water monitoring tasks and consequently simplify further sensor placement. This is approached with no need of hydraulic simulation, as data availability is often limited or not suitable to face anomaly events changing assets and distribution performance. A real water distribution network serving a town near to Naples is used to analyze the proposed graph spectral methodology. In order to test the proposed procedure, a comparison was made with a sensor layout obtained through a bi-objective optimization, through some performance indicators. The results confirm the effectiveness of the proposed spectral procedure.

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