Lost in optimisation of water distribution systems? A literature review of system operation

Environmental Modelling & Software, Journal Year: 2017, Volume and Issue: 93, P. 209 - 254

Published: March 30, 2017

Language: Английский

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The role of water-energy nexus in optimising water supply systems – Review of techniques and approaches

Renewable and Sustainable Energy Reviews, Journal Year: 2017, Volume and Issue: 82, P. 1424 - 1432

Published: July 3, 2017

Language: Английский

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Optimal Water–Power Flow-Problem: Formulation and Distributed Optimal Solution

IEEE Transactions on Control of Network Systems, Journal Year: 2018, Volume and Issue: 6(1), P. 37 - 47

Published: Jan. 12, 2018

This paper formalizes an optimal water–power flow (OWPF) problem to optimize the use of controllable assets across power and water systems while accounting for couplings between two infrastructures. Tanks pumps are optimally managed satisfy demand improving grid operations; network, ac power-flow formulation is augmented accommodate controllability pumps. Unfortunately, physics governing operation infrastructures coupling constraints leads a nonconvex (and, in fact, NP-hard) problem; however, after reformulating OWPF as nonconvex, quadratically constrained quadratic problem, feasible point pursuit-successive convex approximation approach used identify solutions. In addition, distributed solver based on alternating direction method multipliers enables operators pursue individual objectives respecting networks. The merits proposed demonstrated case distribution feeder coupled with municipal network.

Language: Английский

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A Lagrangian decomposition approach for the pump scheduling problem in water networks

European Journal of Operational Research, Journal Year: 2014, Volume and Issue: 241(2), P. 490 - 501

Published: Oct. 9, 2014

Language: Английский

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Energy-Optimal Pump Scheduling and Water Flow

IEEE Transactions on Control of Network Systems, Journal Year: 2017, Volume and Issue: 5(3), P. 1016 - 1026

Published: Feb. 16, 2017

This paper focuses on the optimal operation of water supply networks. We model networks using hydraulic constraints and formulate a joint pump scheduling flow problem (OWF) characteristics variable speed pumps. OWF is mixed-integer nonlinear program. nonconvex, hence NP-hard. To compute an exact solution OWF, we first focus feasibility region propose second-order cone relaxation for OWF. prove that proposed several relevant network topologies. then objective function in show some energy metrics, can be transformed into Furthermore, ADMM-based algorithm to suboptimal solutions lower bounds value when nonconvex. Finally, consider real-world network, demonstrate effectiveness computing schedules flows.

Language: Английский

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Energy and hydraulic efficiency in conventional water supply systems

Renewable and Sustainable Energy Reviews, Journal Year: 2013, Volume and Issue: 30, P. 701 - 714

Published: Nov. 30, 2013

Language: Английский

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A Methodology for the Optimization of Flow Rate Injection to Looped Water Distribution Networks through Multiple Pumping Stations

Water, Journal Year: 2016, Volume and Issue: 8(12), P. 575 - 575

Published: Dec. 6, 2016

The optimal function of a water distribution network is reached when the consumer demands are satisfied using lowest quantity energy, maintaining minimal pressure required at same time. One way to achieve this through optimization flow rate injection based on use setpoint curve concept. In order obtain that, methodology proposed. It allows for assessment and head that each pumping station has provide proper functioning while minimum power consumption kept. can be addressed in two ways: discrete method continuous method. first method, finite set combinations evaluated between stations. search solution performed algorithms. paper, Hooke–Jeeves Nelder–Mead algorithms used. Both hydraulics objective used by solved EPANET its Toolkit. Two case studies evaluated, results application different methods discussed.

Language: Английский

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Adaptive water distribution networks with dynamically reconfigurable topology

Journal of Hydroinformatics, Journal Year: 2014, Volume and Issue: 16(6), P. 1280 - 1301

Published: May 19, 2014

This paper presents a novel concept of adaptive water distribution networks with dynamically reconfigurable topology for optimal pressure control, leakage management and improved system resilience. The implementation District Meter Areas (DMAs) has greatly assisted utilities in reducing leakage. DMAs segregate into small areas, the flow out each area is monitored thresholds are derived from minimum night to trigger leak localization. A major drawback DMA approach reduced redundancy network connectivity which severe impact on resilience, incident quality deterioration. presented adaptively integrates benefits managing advantages large-scale looped increased connectivity, reliability Self-powered multi-function controllers designed integrated telemetry tools high-speed time-synchronized monitoring dynamic hydraulic conditions. computationally efficient robust optimization method based sequential convex programming developed applied reconfiguration control networks. An investigation carried using an operational evaluate proposed method.

Language: Английский

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Optimal Scheduling of Water Distribution Systems

IEEE Transactions on Control of Network Systems, Journal Year: 2019, Volume and Issue: 7(2), P. 711 - 723

Published: Sept. 5, 2019

With dynamic electricity pricing, the operation of water distribution systems (WDS) is expected to become more variable. The pumps moving from reservoirs tanks and consumers can serve as energy storage alternatives if properly operated. Nevertheless, optimal WDS scheduling challenged by hydraulic law, according which pressure along a pipe drops proportionally its squared flow (WF). (OWF) task formulated here mixed-integer nonconvex problem incorporating constraints, critical for fixed-speed pumps, tanks, reservoirs, pipes. constraints OWF are subsequently relaxed second-order cone constraints. To restore feasibility original penalty term appended objective OWF. modified be solved program, analytically shown yield WDS-feasible minimizers under certain sufficient conditions. Under these conditions, suitably weighting term, attain arbitrarily small optimality gaps, thus providing solutions. Numerical tests using real-world demands prices on benchmark demonstrate relaxation exact even setups where conditions not met.

Language: Английский

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Real-Time Multiobjective Optimization of Operation of Water Supply Systems

Journal of Water Resources Planning and Management, Journal Year: 2015, Volume and Issue: 141(9)

Published: Feb. 9, 2015

The need for more efficient use of energy in water distribution systems is increasing constantly due to prices. A new methodology optimized real-time operation a system developed and presented here. based on the integration three models: (1) demand forecasting model, (2) hydraulic simulation model system, (3) optimization model. process driven by cost minimization used pumping maximization operational reliability. latter quantified using alternative measures into order mimic conservative attitude pump scheduling often adopted control room operators real-life systems. Optimal schedules were generated multialgorithm-genetically-adaptive-method (AMALGAM), simulations are performed EPANET2 was recently DAN2-H number other methodological developments enable real time. tested, verified, demonstrated Araraquara, state São Paulo, Brazil. results obtained demonstrate that it possible achieve substantial savings (up 13% relative historical operation) while simultaneously maintaining level supply reliability manually operating system.

Language: Английский

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