Journal of Computer Science

Nonlinear Control Design of Shunt Flexible AC Transmission System Devices for Damping Power System Oscillation

Prechanon Kumkratug

DOI : 10.3844/jcssp.2011.854.858

Journal of Computer Science

Volume 7, Issue 6

Pages 854-858


Problem statement: The disturbance in the complicated network of power system may cause in nonlinear response. Static Synchronous Compensator (STATCOM) is a power electronic based device that has the capability of controlling the line current. This study applies the STATCOM to decrease the over line current in power system during dynamic state. Approach: This study proposes the control strategy of a STATCOM to enlarge the stability region of a simple power system. The control is determined very carefully to satisfy the Lyapunov’s stability criterion and is found to be a non-linear function of system states. The proposed nonlinear control of STATCOM for damping power system oscillation is investigated through the sample system. Results: The maximum generator rotor angle of the faulted system without a STATCOM is continuously oscillation and the maximum value is much more than the system with a STATCOM. Conclusion: STATCOM based the proposed nonlinear control can damp power system oscillation.


© 2011 Prechanon Kumkratug. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.