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| DOI： |
| Received:September 01, 2005Revised:August 04, 2006 |
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| A new adaptive backstepping method for nonlinear control of turbine main steam valve |
| Jun FU, Jun ZHAO |
| (School of Information Science and Engineering,
Northeastern University, Shenyang Liaoning 110004, China;Department of Mechanical and Industrial Engineering, Concordia
University, Montreal Quebec H3G 2W1, Canada) |
| Abstract: |
| A new approach for nonlinear adaptive control of turbine main steam valve is developed. In comparison with the existing controller based on "classical" adaptive backstepping, this method does not follow the classical certainty-equivalence principle in the design of adaptive control law. We introduce this approach, for the firsttime, to power systems and present a novel parameter estimator and dynamic feedback controller for a single machine infinite bus (SMIB)
system with steam valve control. This system contains unknown parameters such as reactance of transmission lines. Besides preserving useful nonlinearities and the real-time estimation of
uncertain parameters, the proposed approach possesses better performances with respect to the response of the system and the speed of adaptation. The simulation results demonstrate that the
proposed approach is better than the design based on "classical" adaptive backstepping in terms of properties of stability and parameter estimation, and recovers the performance of the"full-information" controller. Hence, the proposed method providesan alternative for engineers in applications. |
| Key words: Nonlinear control Adaptive backstepping Steam valve control Power
systems |
