Parameter scheduling in ammonium feedback control
2013 (English)In: 11th IWA conference on Instrumentation, Control and Automation, 2013Conference paper, Poster (Refereed)
Parameter scheduling is a method to change controller settings depending on the process state. This study investigates the feasibility for parameter scheduling in a number of ammonium feedback strategies to improve disturbance rejection during peak load events. The controllers investigated by simulation are fast ammonium control, floating ammonium control and a moving average controller. A controller similar to the floating ammonium controller is also tested in a full-scale plant. The scheduling changes the upper bound on the DO set-point or the controller gain and integral time when effluent ammonium reaches a specified level. By this scheduling strategy the average ammonium concentration is decreased by up to 9%. The moving average controller showed the most promising results, but the results depend on the dissolved oxygen half saturation constant.
Place, publisher, year, edition, pages
IdentifiersURN: urn:nbn:se:uu:diva-214493OAI: oai:DiVA.org:uu-214493DiVA: diva2:684922
ICA 2013, September 18-20, Narbonne, France