The Use of Three-Phase Fault Analysis for Rating Circuit Breakers on Nigeria 330 kV Transmission Lines
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Medwell Journals
Abstract
Description
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 cwrent magnitude in the test system. The test
system is the Nigeria 28-bus, 330 kV Transmission System. The 28-bus system is simulated using
1.1ATLAB-based programme and the maximwn cment magnitude obtained is used to determine an appropriate
value of the circuit breaker rating for all the lines in 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 cwrent that flows through the power line to the point of fault and recorded the highest value of
6.4376 kA (36.796 pu) through tbe line 4-3 (Jebba GS-Jebba IS) when Jebba GS is faulted
Keywords
T Technology (General), TK Electrical engineering. Electronics Nuclear engineering