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Nonlinear control of a condensation turbine with steam extraction | IEEE Conference Publication | IEEE Xplore

Nonlinear control of a condensation turbine with steam extraction


Abstract:

This paper aims at demonstrating the possible improvement of currently used control concepts for steam turbines. A model-based control is designed for a condensation turb...Show More

Abstract:

This paper aims at demonstrating the possible improvement of currently used control concepts for steam turbines. A model-based control is designed for a condensation turbine with steam extraction, which is used to drive a compressor on the chemical process side. The turbine is part of a sophisticated steam system of a chemical high-duty plant. Modeling of the steam system with the turbine leads to a system of two nonlinear differential equations. Taking advantage of the flatness property of the given nonlinear system model, a flatness-based control approach involving nonlinear feedforward and feedback control is employed. Remaining model uncertainties as well as nonlinear friction can be counteracted by an observer-based disturbance compensation. Simulation results show an excellent control performance with small control errors.
Date of Conference: 22-25 August 2011
Date Added to IEEE Xplore: 29 September 2011
ISBN Information:
Conference Location: Miedzyzdroje, Poland

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