Distributed zone MPC of pressure management for water distribution network systems. Issue 11 (11th June 2019)

• Record Type: Journal Article
• Authors: Liu, Dongming; Li, Shaoyuan; Zheng, Yi; Wu, Jing
• Is Part Of: IET control theory & applications. Volume 13:Issue 11(2019)
• Page Start: 1704
• Page End: 1717
• Publication Date: 2019-06-11
• Subjects: performance index -- predictive control -- optimisation -- water supply; distributed coordinated strategy -- pressure management -- water distribution network systems -- scale water distribution network -- distributed zone model predictive control -- terminal water head -- thedesired pressure range -- constrained distributed zone MPC -- reference trajectory -- desired pressure range constraints -- distributed zone MPC optimisation problem; Control theory -- Periodicals; Automatic control -- Periodicals; 629.8312
• DOI: 10.1049/iet-cta.2018.6273
• Languages: English
• ISSNs: 1751-8644

Abstract

Abstract : In the pressure management of large scale water distribution network (WDN), a distributed zone model predictive control (MPC) is proposed to keep the terminal water head in thedesired pressure range for satisfying the customer's demand, avoiding frequently operating of the actuator and reducing the correlation between subsystems. To ensure the existence of feasible solutions of constrained distributed zone MPC, a new reference trajectory of the tank level is introduced as an optimised variable. With the consideration of the desired pressure range constraints on the new reference trajectory and some physical constraints on the corresponding physical variables, a distributed zone MPC is presented to minimise the weighted sum of the three terms in the proposed performance index. To achieve the convergence of distributed zone MPC optimisation problem, an augmented Lagrangian formulation is applied to the distributed coordinated strategy. The proposed distributed zone MPC is applied to the WDN in the Shinan district of Shanghai, and the effectiveness of the method is illustrated.