TY  - JOUR
T1  - Low Frequency Power Oscillation Damping Enhancement and Voltage Improvement Using Unified Power Flow Controller (UPFC) in Multi-Machine Power System
AU - Mark Ndubuka, Nwohu 
JO  - International Journal of Electrical and Power Engineering
VL  - 5
IS  - 4
SP  - 174
EP  - 180
PY  - 2011
DA  - 2001/08/19
SN  - 1990-7958
DO  - ijepe.2011.174.180
UR  - https://makhillpublications.co/view-article.php?doi=ijepe.2011.174.180
KW  - Power oscillation damping
KW  -power systems
KW  -UPFC
KW  -FACTS devices
KW  -low frequency oscillation
KW  -Nigeria
AB  - The problem of low-frequency power swings is a matter of concern for power systems engineers in the operation and planning of power systems. Therefore, this study is an investigation of the use of Unified Power Flow Controller (UPFC) that is suitably tuned to improve the damping of low frequency power oscillations present in Nigerian grid system. A large disturbance is initiated during simulation in PSAT in the network to induce nonlinear oscillations of the power system in order to ascertain the damping effect of UPFC. The dynamic responses of the system simulated show that the system is well damped and is stabilized at minimal time which confirms the robustness of the UPFC. Finally, a comparative study in a typical transient stability problem on IEEE 14-bus system using a UPFC model and the Nigerian high voltage interconnected system is used to illustrate the concepts presented in this study.
ER  -