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Parameter scheduling in ammonium feedback control
Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Systems and Control. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Automatic control.
Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Systems and Control. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Automatic control.
2013 (English)In: 11th IWA conference on Instrumentation, Control and Automation, 2013Conference paper, Poster (with or without abstract) (Refereed)
Abstract [en]

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
2013.
National Category
Control Engineering
Identifiers
URN: urn:nbn:se:uu:diva-214493OAI: oai:DiVA.org:uu-214493DiVA: diva2:684922
Conference
ICA 2013, September 18-20, Narbonne, France
Projects
VA-kluster Mälardalen
Available from: 2014-01-08 Created: 2014-01-08 Last updated: 2014-01-09

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Carlsson, BengtÅmand, Linda

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