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Anti-surge control: Control theoretic analysis of existing anti-surge control strategies
Norwegian University of Science and Technology, Faculty of Information Technology, Mathematics and Electrical Engineering, Department of Engineering Cybernetics.
2009 (English)MasteroppgaveStudent thesis
Abstract [en]

This report on compressor anti-surge control closes some of the gaps related to the significant properties of control strategies. Anti-surge control is an important issue in operation of e.g. oil and gas processing plants. However, control strategies have not previously been studied thoroughly from a control theoretic viewpoint. Special attention is given to the input-output relationship between recycle valve opening and control variable when changing the compressor speed. The properties are then validated through simulations. The compression system is found to be open-loop stable for operating points along the surge control line. However, the behaviour of control variable in different points is highly dependent on control strategy. A normalized control variable structure based on a operating point invariant to inlet conditions will perform similarly for a range of compressor speeds. The report also provide greater insight in the dynamics of the compression system, along with guidelines for strategy analysis and synthesis and controller tuning.

Place, publisher, year, edition, pages
Institutt for teknisk kybernetikk , 2009. , 87 p.
URN: urn:nbn:no:ntnu:diva-24936Local ID: ntnudaim:4473OAI: diva2:725629
Available from: 2014-06-16 Created: 2014-06-16 Last updated: 2014-06-16Bibliographically approved

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