@misc{BurgschweigerGnaedigSteinbach, author = {Burgschweiger, Jens and Gn{\"a}dig, Bernd and Steinbach, Marc}, title = {Nonlinear Programming Techniques for Operative Planning in Large Drinking Water Networks}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-8657}, number = {05-31}, abstract = {Mathematical decision support for operative planning in water supply systems is highly desirable but leads to very difficult optimization problems. We propose a nonlinear programming approach that yields practically satisfactory operating schedules in acceptable computing time even for large networks. Based on a carefully designed model supporting gradient-based optimization algorithms, this approach employs a special initialization strategy for convergence acceleration, special minimum up and down time constraints together with pump aggregation to handle switching decisions, and several network reduction techniques for further speed-up. Results for selected application scenarios at Berliner Wasserbetriebe demonstrate the success of the approach.}, language = {en} }