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Multimachine transient stability analysis of the expanded 49 bus, 330KV Nigeria power system

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3 Author(s)
Izuegbunam, F.I. ; Dept. of Electr. & Electron. Eng., Fed. Univ. of Technol., Owerri, Nigeria ; Okafor, E.N.C. ; Ogbogu, S.O.E.

The recent power sector reform in Nigeria has thrown up enormous challenges in this sector, ranging from the construction of more power stations, new transmission lines and substations. The existing network of 8-plants and 26 bus-bars expanded to a network of 16 generating plants with 49 bus-bars. Power flow evaluation of this expanded 330KV network was done using the Newton-Raphson technique, while transient stability analysis of the power system was simulated by direct method using ode45 MATLAB programmed functions. The results show better network configuration, though buses interconnected via long transmissions lines recorded high voltage profile violation. The critical clearing times and stability margins for three-phase faults at buses 3 (line 3-44) and 31 (line 2-31) were established as 0.21 second, 0.238 and 0.29 second, 0.448 respectively. The result provided a suite of specifications and standards for the expanded grid system.

Published in:

Adaptive Science and Technology (ICAST), 2011 3rd IEEE International Conference

Date of Conference:

24-26 Nov. 2011

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