Abstract

This paper proposes an Asset-Based methodology to measure the resilience of Water Distribution Networks (WDNs). In the proposed approach, based on impacts of failure of every single asset on the performance of the system, specific degree of criticality in the estimation of a WDN resiliency can be evaluated. This criticality may be extended into three resiliency dimensions; technical, economic and social. Five indexes namely; Hydraulic Critically Index, Regret Cost (revenue losses associated with water sales), Graduality (speed of outage progression from a failure), Recovery Rate (rate of system performance recovery to a normal state) and Water Outage Time (unsatisfactory duration of system performance) are introduced here to address these resiliency dimensions. Several MATLAB suit codes are written and incorporated into the EPANET software to assess the proposed indexes for a real case study suffering from high rate of pipe failure. The results show that an asset usually has common behaviour in both of technical and economic resiliency aspects. Furthermore, system performance in case of a failure can decrease faster than the rate of recovering to a normal state. In addition, the new indexes can confidently assess the weak points, strength points and finally the asset’s role in the system’s resiliency while quantifying internal technical capacities. In brief, addressing resilience assessment within the proposed approach can help in targeting high-priority maintenance needs of WDNs and mobilize minimizing the consequences of each failure event.

中文翻译：

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基于资产的配水网弹性评估

摘要

本文提出了一种基于资产的方法来测量水分配网络（WDN）的弹性。在提出的方法中，基于每项资产的故障对系统性能的影响，可以评估WDN弹性估算中的特定关键程度。可以将这种关键性扩展为三个弹性维度。技术，经济和社会。五个指标：水力关键指标，后悔成本（与水销售相​​关的收入损失），偿付能力（故障导致的停运进展速度），恢复率（系统性能恢复到正常状态的速度）和停水时间（系统性能持续时间不令人满意）此处介绍以解决这些弹性问题。编写了几个MATLAB套装代码，并将其合并到EPANET软件中，以评估针对管道故障率很高的实际案例研究提出的指标。结果表明，资产通常在技术和经济弹性方面都具有共同的行为。此外，发生故障时的系统性能下降速度可能快于恢复到正常状态的速度。此外，新指标可以在量化内部技术能力的同时，自信地评估薄弱点，优势点，最后评估资产在系统弹性中的作用。简而言之，在提议的方法中处理弹性评估可以帮助确定WDN的高优先级维护需求，并最大程度地减少每次故障事件的后果。