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Dynamic modeling and simulation of a water supply system with applications for improving energy efficiency

机译：供水系统的动态建模和仿真及其在提高能源效率方面的应用

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摘要

This paper presents the dynamic simulation of an urban water supply system based on a phenomenological model of distributed parameters capable of predicting the hydraulic behavior and the energy consumption. This case study involves a segment of the supply and distribution water system in the city of Salvador (Brazil), and the analysis focuses on the pumping station, water mainline, and distribution tanks. The current operation of the system is performed through heuristic rules based on expert knowledge, and the control of discharge flow pumps is essentially on/off. The comparison between simulation results and measured data shows that the model describes the hydraulic network satisfactorily as it is able to predict the transient behavior of the flow along the water main line. Considering the high capacity and dimensions together with the intrinsic dynamic features (disturbances caused by the maneuvers in the pump operation and variable demand throughout the day), the use of dynamic modeling for the case studied is really needed for the simulation results to be consistent. Furthermore, the dynamic model and strategy used enables a careful analysis of the water supply system and represents a potential tool for the evaluation of control strategies and energy efficiency. The results show the potential gain in energy efficiency with the inclusion of frequency converters in the pumping system without considerable changes in the level of reservoirs and ensuring the total service demand.
机译：本文提出了一种基于分布式参数现象模型的城市供水系统的动态仿真模型，该模型能够预测水力行为和能耗。该案例研究涉及萨尔瓦多（巴西）市的供水和分配水系统的一部分，分析重点是抽水站，供水干线和分配水箱。系统的当前操作通过基于专家知识的启发式规则执行，并且排放泵的控制基本上是开/关。仿真结果与实测数据的比较表明，该模型能够较好地描述液压网络，因为它能够预测沿水主管线的流动的瞬态行为。考虑到高容量和大尺寸以及固有的动态特征（由泵操作中的操纵引起的干扰和全天的可变需求），为了使模拟结果保持一致，确实需要对案例进行动态建模。此外，所使用的动态模型和策略可以对供水系统进行仔细的分析，并且是评估控制策略和能源效率的潜在工具。结果表明，在泵系统中包括变频器的情况下，在不显着改变水库水位和确保总服务需求的情况下，潜在地提高了能源效率。

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