Transient Stability Analysis of the Nigeria 330-kV Transmission Network
American Journal of Electrical Power and Energy Systems
Volume 6, Issue 6, November 2017, Pages: 79-87
Received: Sep. 7, 2017; Accepted: Sep. 26, 2017; Published: Oct. 23, 2017
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Ignatius Kema Okakwu, Department of Electrical/Electronic Engineering, Faculty of Engineering, University of Benin, Benin City, Nigeria
Emmanuel Apoyi Ogujor, Department of Electrical/Electronic Engineering, Faculty of Engineering, University of Benin, Benin City, Nigeria
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Assessment of the dynamic response of generators, within a power system, when subjected to various disturbances, has been a major challenge to power system researchers and engineers for the past decades. This paper investigates the dynamic response of the generators in the Nigeria 330-kV grid network when a balanced 3-phase fault is applied with the aim of determining the Critical Clearing Time (CCT) of the transmission network. The generalized swing equations for a multi-machine power system is presented. MATLAB software is employed as the tool for the simulations. A real network of Nigeria 330-kV electric grid is used as a case study. The result obtained clearly show that there exist critical buses such as Benin, Onitsha and Jebba Transmission Station (TS) and critical transmission lines such as Benin-Olorunshogo Generating Station (GS) and Jebba TS-Shiroro GS within the network. The results also reveal that the system losses synchronism when a balanced 3-phase fault is applied to these identified critical buses and lines. The results further indicate that the Nigeria 330-kV transmission network is on a red-alert, which requires urgent control measures with the aim of enhancing the stability margin of the network to avoid system collapse.
Transient Stability, Critical Clearing Time, Nigeria 330-kV, Power System
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Ignatius Kema Okakwu, Emmanuel Apoyi Ogujor, Transient Stability Analysis of the Nigeria 330-kV Transmission Network, American Journal of Electrical Power and Energy Systems. Vol. 6, No. 6, 2017, pp. 79-87. doi: 10.11648/j.epes.20170606.11
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This article is an open access article distributed under the Creative Commons Attribution License ( which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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