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Stability Analysis of a Unified Power Flow Controller

Omar H. Abdalla, Oman Electricity Transmission Company
Mohamed A. E. Ghazy, Dept. of Electrical EngineeringOctober University of Modern Sciences & Arts, Egypt.,
Lotfy M. Lotfy, Dept. of Electrical Power and Machines Engineering, University of Helwan, Egypt.
Nermeen A. M. Hassan, Dept. of Electrical Power and Machines Engineering, University of Helwan, Egypt.

Abstract

The paper concerns with stability analysis of a Unified Power Flow Controller (UPFC). A nonlinear model is described in the abc-reference frame and then transformed into the dq0-reference frame. The model includes shunt and series compensators of the UPFC. Stability analysis is presented first in a three-dimensional space of system parameters. A linearized model is obtained in state-space form to be used in small-signal stability studies. Effects of system parameters on stability are investigated using eigenvalue analysis. These include resistance, reactance, and modulation indices of the shunt and series components of the UPFC. Simulation results show that the stability of the UPFC can be affected by these parameters. The results are useful for UPFC designers and engineers who set technical specifications of these control devices.

Suggested Citation

Omar H. Abdalla, Mohamed A. E. Ghazy, Lotfy M. Lotfy, and Nermeen A. M. Hassan. "Stability Analysis of a Unified Power Flow Controller" Proceedings of the 13th International Middle East Power System Conference (MEPCON 2009), Assiut University, Assiut, Egypt, 20-23 December 2009. (2009): 593-597.
Available at: http://works.bepress.com/omar/10