Publication

On modelling approaches for receding-horizon control design applied to large-scale sewage systems

Conference Article

Conference

IEEE Conference on Decision and Control (CDC)

Edition

48th

Pages

8052-8058

Doc link

http://dx.doi.org/10.1109/CDC.2009.5400216

File

Download the digital copy of the doc pdf document

Abstract

In this paper, receding horizon control of large- scale sewage systems is addressed considering different mod- elling approaches, which include several inherent continu- ous/discrete phenomena (overflows in sewers and tanks) and elements (weirs) in the system. This fact results in distinct behaviours depending on the dynamic state (flow/volume) of the network. These behaviours can not be neglected nor can be modelled by a pure linear representation. In order to take into account these phenomena and elements for the design of the control strategy, a modelling approach based on piece-wise linear functions (PWLF) is proposed and compared against a hybrid modelling approach previously reported by the authors. Control performance results and associated computation times considering both modelling approaches are compared by using a real case study based on the Barcelona sewer network. Results have shown an important reduction in the computation time when the PWLF-based model is used, with an acceptable suboptimality level in the closed-loop system performance.

Categories

dynamic programming, optimal control, optimisation, predictive control, suboptimal control.

Author keywords

Receding-horizon control, dynamical optimization, system modelling, large-scale systems, sewer networks, model predictive control

Scientific reference

C. Ocampo-Martínez and V. Puig. On modelling approaches for receding-horizon control design applied to large-scale sewage systems, 48th IEEE Conference on Decision and Control, 2009, Shanghai, pp. 8052-8058, IEEE.