Fault diagnosis and security monitoring in water distribution systems
| Main Author: | Eliades, Demetrios |
|---|---|
| Format: | info publication-thesis Journal |
| Bahasa: | eng |
| Terbitan: |
, 2012
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/1037132 |
Daftar Isi:
- Water distribution systems have a significant role in sustaining vital societal functions; however, when a system fault occurs, such as a water contamination intrusion or a pipe break, these societal functions may be negatively affected. This thesis presents a formulation of a system-theoretic framework suitable for fault diagnosis and security monitoring in water distribution systems. First, a formulation of the monitoring and control problem of water distribution networks is presented, in a framework suitable for sensor placement and fault diagnosis. Based on the developed framework, the sensor placement problem is examined, to find suitable locations in a water distribution network where on-line quality sensors ought to be installed, for minimizing the risk of a severe damage on population, in case that a contaminant enters the network and is distributed with flow. Furthermore, the manual quality sampling scheduling problem is examined, to find where and when to take water samples for quality monitoring. Next, a disinfectant concentration regulation algorithm for water distribution networks is designed, using adaptive approximation to learn water demands. The detection of hydraulic leakage faults in District Metered Areas (DMA) is examined, by using a fault detection method based on learning the periodic consumption dynamics. Finally, the impact of a contamination detected in a water distribution system is evaluated, and its source area is isolated, using a methodology based on decision tree induction. The effectiveness of the proposed methodologies is illustrated with simulations using water distribution system models and historical hydraulic data.