Nigerian Journal of Technology

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Improving the transient stability of the Nigeria 330kV transmission grid using thyristor controlled series compensator

I.K. Okakwu, E.A. Ogujor, P.E. Orukpe


This study reveals the transient stability improvement capability of Thyristor Controlled Series Compensation (TCSC) as an effective Flexible AC Transmission System (FACTS) device in damping low frequency oscillations on the Nigeria 330kV transmission system. The study was performed using commercially available MATLAB software. The analysis was carried out by simulating a 3-phase fault on the network in order to determine the Critical Clearing Time (CCT) of the system. In locating the TCSC, the most severely disturbed generator was considered. Simulation results on the Nigeria 330kV transmission system modelled in MATLAB environment reveals appreciable transient stability enhancement of the network.

Keywords: transient stability, critical clearing time, thyristor-controlled series compensator, 3-phase fault, Nigerian 330kV transmission system

AJOL African Journals Online