Mollerup, Ane Loft1; Mikkelsen, Peter Steen2; Thornberg, Dines5; Sin, Gürkan6
1 Department of Chemical and Biochemical Engineering, Technical University of Denmark2 Department of Environmental Engineering, Technical University of Denmark3 Urban Water Engineering, Department of Environmental Engineering, Technical University of Denmark4 CAPEC-PROCESS, Department of Chemical and Biochemical Engineering, Technical University of Denmark5 Biofos A/S6 Centre for oil and gas – DTU, Center, Technical University of Denmark
A systematic methodology for regulatory control analysis and design is adapted for sewer system operation and evaluated. The main challenge with adapting the methodology is the handling of the stochastic and transient nature of the rainfall disturbances, inherent to sewer system operation. To this end, four distinct modes of operation are identified (dry weather, filling, saturation and emptying) and for each of these the process gain matrix is found. Based on the gain matrices a controllability analysis is performed, to screen for suitable pairings between measurements and actuators in the case study area of Copenhagen. The analysis effectively reduces the number of potential controlled variables, by considering the sensitivity of the measurements towards changes in the manipulated variables. Several potential pairings are generated and the best alternative is chosen for closed-loop testing. The methodology is a promising tool for systematic generation of solutions for sewer system control.
Environmental Modelling and Software, 2015, Vol 66, p. 153-166
Sewer system control; Regulatory control; Controllability analysis; Pairing