標題: An Inverse Transient-Based Optimization Approach to Fault Examination in Water Distribution Networks
作者: Lin, Chao-Chih
Yeh, Hund-Der
環境工程研究所
Institute of Environmental Engineering
關鍵字: fault identification;hydraulic transient;inverse transient analysis (ITA);water distribution network;optimization approach
公開日期: 1-Jun-2019
摘要: This research introduces an inverse transient-based optimization approach to automatically detect potential faults, such as leaks, partial blockages, and distributed deteriorations, within pipelines or a water distribution network (WDN). The optimization approach is named the Pipeline Examination Ordinal Symbiotic Organism Search (PEOS). A modified steady hydraulic model considering the effects of pipe aging within a system is used to determine the steady nodal heads and piping flow rates. After applying a transient excitation, the transient behaviors in the system are analyzed using the method of characteristics (MOC). A preliminary screening mechanism is adopted to sift the initial organisms (solutions) to perform better to reduce most of the unnecessary calculations caused by incorrect solutions within the PEOS framework. Further, a symbiotic organism search (SOS) imitates symbiotic relationship strategies to move organisms toward the current optimal organism and eliminate the worst ones. Two experiments on leak and blockage detection in a single pipeline that have been presented in the literature were used to verify the applicability of the proposed approach. Two hypothetical WDNs, including a small-scale and large-scale system, were considered to validate the efficiency, accuracy, and robustness of the proposed approach. The simulation results indicated that the proposed approach obtained more reliable and efficient optimal results than other algorithms did. We believe the proposed fault detection approach is a promising technique in detecting faults in field applications.
URI: http://dx.doi.org/10.3390/w11061154
http://hdl.handle.net/11536/152159
ISSN: 2073-4441
DOI: 10.3390/w11061154
期刊: WATER
Volume: 11
Issue: 6
起始頁: 0
結束頁: 0
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