Observer-Based Active Control of Torsional Vibration for Large Turbine-Generator Shaft System

For active torsional vibration control in a turbine-generator shaft system, it is neither practical nor cost-effective to implement as many sensors as state variables. In this paper, an observer-based active control strategy is proposed to achieve an optimal control of torsional vibration on a turbi...

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Bibliographic Details
Main Authors: Feng, Liming, Gao, Wenzhi, Tan, Congmin, Qin, Hao, Xie, Bixian, Hao, Zhiyong
Format: Conference Proceeding
Language:English
Subjects:
Algorithm design and analysis
Computational modeling
Control systems
Feedback control
Observers
Optimal control
Sensor systems
Shafts
State estimation
Vibration control
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Summary:For active torsional vibration control in a turbine-generator shaft system, it is neither practical nor cost-effective to implement as many sensors as state variables. In this paper, an observer-based active control strategy is proposed to achieve an optimal control of torsional vibration on a turbine-generator shaft system. A dynamical observer is designed to estimate the system states and form a complete control system. The theoretical issues of the algorithm on observer design are discussed. Based on the theoretical design algorithm, an observer gain and a feedback control matrix are selected. In order to validate the effectiveness of the control strategy the computer analysis and experimental simulation are carried out under a cosine excitation from a 200 MW turbine-generator. The results from calculation and experiment show a robust stability and a good control effectiveness of the control system.
ISSN:2157-4839
DOI:10.1109/APPEEC.2010.5448191