Authors : Ademola Abdulkareem, C.O.A. Awosope and A.A. Awelewa
Abstract: Fault studies play a significant role in the power system security for the supply and generation of electrical energy to end-users. This research work focuses on the analysis and simulation of 3 kV" fault phenomenon to determine the voltage magnitude and fault current magnitude in the test system. The test system is the Nigeria 28-bus, 330 kV Transmission System. The 28-bus system is simulated using MATLAB-based programme and the maximum current magnitude obtained is used to determine an appropriate value of the circuit breaker rating for all the linesin the 330 kV power system. This research therefore, suggests the level of protection to be applied on Nigeria 330 kV power lines with the aim of improving system security as the information gained from this study helps in the setting of relay. The study revealed the abnormally high magnitude of current that flows through the powerline to the point of fault and recorded the highest value of 6.4376 kA (36.796 pu) through the line 4-3 (Jebba GS-Jebba TS) when Jebba GS is faulted.
Ademola Abdulkareem, C.O.A. Awosope and A.A. Awelewa, 2016. The Use of Three-Phase Fault Analysis for Rating Circuit Breakers on Nigeria 330 kV Transmission Lines. Journal of Engineering and Applied Sciences, 11: 2612-2622.