Control of water distribution networks with dynamic DMA topology using strictly feasible sequential convex programming

Abstract

Abstract.The operation of water distribution networks (WDN) with a 4 dynamic topology is a recently pioneered approach for the advanced man- indicate AZP reductions for a dynamic topology of up to 6.5% over optimally 26 controlled fixed topology DMAs.

Penalty and relaxation methods for the optimal placement and operation of control valves in water supply networks

“…The sectorization of water networks is implemented through the installation of closed boundary valves in order to form small metered areas (sectors); consequently, the flow into these sectors can be accurately measured and the pressure can be reduced to continuously maintain the minimum pressure requirements at a critical point. While this practice has allowed an efficient leakage management, it has severely reduced the redundancy in network connectivity thus affecting the system resilience [43] and water quality [3]. Recent work on water distribution networks with dynamically adaptively network topology [43] pioneers a hybrid mode of operation that integrates the benefits of leakage reduction and management provided by sectorised networks with the extra benefits of improved network connectivity, redundancy and resilience.…”

“…While this practice has allowed an efficient leakage management, it has severely reduced the redundancy in network connectivity thus affecting the system resilience [43] and water quality [3]. Recent work on water distribution networks with dynamically adaptively network topology [43] pioneers a hybrid mode of operation that integrates the benefits of leakage reduction and management provided by sectorised networks with the extra benefits of improved network connectivity, redundancy and resilience. Dynamically adaptive networks are segregated into small sectors during periods of low demand (e.g.…”

“…To benefit from these emerging and advanced control schemes, the retrofitting of existing networks with control valves, which provide advanced forms of flow and pressure modulation [41,43], requires the formulation and solution of both design and operational optimization problems. In the present work we focus on the mathematical optimization for network pressure management, minimizing average zone pressure through the optimal placement and operation of pressure control valves.…”

Outer approximation methods for the solution of co-design optimisation problems in water distribution networks

“…, q max n p ) ∈ R n p ×n p is the diagonal matrix of maximum allowed flows. Wright et al (2015) have considered the problem of optimising control settings of pressure reducing valves whose locations are known. The action of each valve is modelled by an additional variable representing the head loss introduced by the controller.…”

“…In the practical experience of the authors, once the locations of the valves are chosen, the optimisation of their operation using standard NLP solvers always generates a near-optimal solution, even though such a Problem is nonconvex -see also Wright et al (2015). The main effect of the nonconvexity of the constraints is observed in the solution of (M (F , N )).…”