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A methodological approach to the design of optimising control strategies for sewer systems
Affiliation:1. modelEAU, Département de génie civil et de génie des eaux, Université Laval, 1065 Avenue de la Médecine, Québec, QC G1V 0A6, Canada;2. Chaire de recherche EDS en prévisions et actions hydrologiques, Département de génie civil et de génie des eaux, Université Laval, 1065 Avenue de la Médecine, Québec, QC G1V 0A6, Canada;3. Département de génie civil et de génie des eaux, Université Laval, 1065 Avenue de la Médecine, Québec, QC G1V 0A6, Canada
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.
Keywords:Sewer system control  Methodology  Optimisation  Regulatory control  Benchmarking  Control hierarchy  CDS"}  {"#name":"keyword"  "$":{"id":"kwrd0045"}  "$$":[{"#name":"text"  "_":"Chicago design storm  CSO"}  {"#name":"keyword"  "$":{"id":"kwrd0055"}  "$$":[{"#name":"text"  "_":"Combined sewer overflow  CV"}  {"#name":"keyword"  "$":{"id":"kwrd0065"}  "$$":[{"#name":"text"  "_":"controlled variable  MV"}  {"#name":"keyword"  "$":{"id":"kwrd0075"}  "$$":[{"#name":"text"  "_":"manipulated variable  PASST"}  {"#name":"keyword"  "$":{"id":"kwrd0085"}  "$$":[{"#name":"text"  "_":"planning aid for sewer system real time control  P-controller"}  {"#name":"keyword"  "$":{"id":"kwrd0095"}  "$$":[{"#name":"text"  "_":"proportional controller  PID"}  {"#name":"keyword"  "$":{"id":"kwrd0105"}  "$$":[{"#name":"text"  "_":"proportional integral derivative  RMSE"}  {"#name":"keyword"  "$":{"id":"kwrd0115"}  "$$":[{"#name":"text"  "_":"root mean square error  SISO"}  {"#name":"keyword"  "$":{"id":"kwrd0125"}  "$$":[{"#name":"text"  "_":"Single-Input Single Output  SVK"}  {"#name":"keyword"  "$":{"id":"kwrd0135"}  "$$":[{"#name":"text"  "_":"The Water Pollution Committee of The Society of Danish Engineers (in Danish: Spildevandskomiteen)  VT"}  {"#name":"keyword"  "$":{"id":"kwrd0145"}  "$$":[{"#name":"text"  "_":"virtual tank
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