H-Infinity Analysis Method For The Small Signal Stability Of Power System
PROCEEDINGS OF THE 26TH CHINESE CONTROL CONFERENCE, VOL 3(2007)
Abstract
This work is concerned with the small signal stability problem in multi-machine systems. By means of H theory, firstly the math model with disturbances is constructed; and secondly, the excitation control law for each generator is designed based on solving Riccati Equation. Finally, simulations performed on 4-machine system shows that the proposed H method has more advantages over LQR method in both damping ratio and H-infinity norm of the corresponding closed-loop system and so can enhance the small signal stability of power system greatly.
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Key words
small signal stability,H-infinity method,excitation control,multi-machine systems
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