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Sum-of-delay models for pressure control in Water Distribution Networks
Control Engineering Practice ( IF 4.9 ) Pub Date : 2021-05-18 , DOI: 10.1016/j.conengprac.2021.104844
Giacomo Galuppini , Enrico Creaco , Lalo Magni

Service pressure control is a powerful tool to reduce leakage and risk of pipe bursts in Water Distribution Networks (WDNs). However, to obtain good control performances, it is essential to rely on a good model of the plant. A typical approach consists of the identification of a linear, local model of the system around the desired working point. Previous works relied on black-box, high order models to demonstrate that WDNs are characterised by a very complex dynamic behaviour, which should be properly modelled to avoid stability issues resulting from poor regulator design. This work aims at providing a physical justification for such complex dynamic behaviour, by means of a particular grey-box model structure, with pure delays as its fundamental blocks. Moreover, this works demonstrates that the new model structure can be very effective and efficient in modelling the WDN dynamics. Finally, to proper exploit the new model, this work proposes a bi-objective optimisation based procedure for the regulator design. The potentialities of both model identification and regulator design phases are assessed by means of simulated experiments performed on a detailed unsteady flow model of three different WDNs.



中文翻译:

供水管网压力控制的延迟总和模型

维修压力控制是减少漏水和水分配网络(WDN)中管道爆裂风险的有力工具。但是,要获得良好的控制性能,必须依靠良好的工厂模型。一种典型的方法包括在所需工作点周围确定系统的线性局部模型。以前的工作依赖于黑匣子的高阶模型来证明WDN具有非常复杂的动态行为,应适当地建模以避免因不良的稳压器设计而导致的稳定性问题。这项工作旨在通过特定的灰箱模型结构为这种复杂的动态行为提供物理证明,并以纯延迟作为其基本要素。而且,这项工作表明,新的模型结构可以非常有效地对WDN动力学进行建模。最后,为适当利用新模型,这项工作提出了一种基于双目标优化的调节器设计程序。通过对三种不同WDN的详细非稳态流动模型进行的模拟实验,可以评估模型识别和调节器设计阶段的潜力。

更新日期:2021-05-18
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