A methodological approach to the design of optimising control strategies for sewer systems. (September 2016)

• Record Type: Journal Article
• Authors: Mollerup, Ane Loft; Mikkelsen, Peter Steen; Sin, Gürkan
• Is Part Of: Environmental modelling & software. Volume 83(2016:Sep.)
• Page Start: 103
• Page End: 115
• Publication Date: 2016-09
• Subjects: Sewer system control -- Methodology -- Optimisation -- Regulatory control -- Benchmarking -- Control hierarchy; CDS Chicago design storm -- CSO Combined sewer overflow -- CV controlled variable -- MV manipulated variable -- PASST planning aid for sewer system real time control -- P-controller proportional controller -- PID proportional integral derivative -- RMSE root mean square error -- SISO Single-Input Single Output -- SVK The Water Pollution Committee of The Society of Danish Engineers (in Danish: Spildevandskomiteen) -- VT virtual tank; Environmental monitoring -- Computer programs -- Periodicals; Ecology -- Computer simulation -- Periodicals; Digital computer simulation -- Periodicals; Computer software -- Periodicals; Environmental Monitoring -- Periodicals; Computer Simulation -- Periodicals; Environnement -- Surveillance -- Logiciels -- Périodiques; Écologie -- Simulation, Méthodes de -- Périodiques; Simulation par ordinateur -- Périodiques; Logiciels -- Périodiques; Computer software; Digital computer simulation; Ecology -- Computer simulation; Environmental monitoring -- Computer programs; Periodicals; Electronic journals; 363.70015118
• DOI: 10.1016/j.envsoft.2016.05.004
• Languages: English
• ISSNs: 1364-8152

Abstract

Abstract: This study focuses on designing an optimisation based control for sewer system in a methodological way and linking it to a regulatory control. Optimisation based design is found to depend on proper choice of a model, formulation of objective function and tuning of optimisation parameters. Accordingly, two novel optimisation configurations are developed, where the optimisation either acts on the actuators or acts on the regulatory control layer. These two optimisation designs are evaluated on a sub-catchment of the sewer system in Copenhagen, and found to perform better than the existing control; a rule based expert system. On the other hand, compared with a regulatory control technique designed earlier in Mollerup et al. (2015), the optimisation showed similar performance with respect to minimising overflow volume. Hence for operation of small sewer systems, regulatory control strategies can offer promising potential and should be considered along more advanced strategies when identifying novel solutions. Highlights: A methodology for hierarchical design of control and optimisation for sewer systems. Systematic evaluation of optimisation based sewer system control on a case study. Benchmarking of optimisation parameters. Comparison of optimisation based control and regulatory control. Two novel control solutions are found that outperform the existing control system.