• ASUQUO E.E
• BRAIDE S. L
• Akisot E. E., ,
• Koledoye T. O
• A. J. Onah

The analysis of transmission lines under fault condition represents one of the most important and complex task in Power Engineering. The studies and detection of these faults is necessary to ensure that the reliability and stability of the power system do not suffer a decrement as a result of a critical event such a fault. This project conduct a research, analyse and evaluate the behaviour of a transmission lines under fault conditions and evaluate different scenarios of faults. This was done using ETAP 16. Fault is an abnormal condition that involves an electrical failure of power system equipment operating at one of primary voltage within the system. It was revealed that three-phase fault, the voltages at faulted buses phases dropped to zero, voltage at Phase A is equal to zero in single line-to-ground fault double line-to-ground fault, Phase B and C voltages are equal to zero and this type of fault is the most sever fault on the system. Positive sequence bus 1, has the lowest resistance of 2.80435 Ω and impedance of 12.003 Ω, bus 57 has the highest resistance of 63.5967 Ω, with the highest reactance of 59.4 Ω in bus 57 and bus 2 has the lowest reactance of 11.296 Ω and the highest impedance of 86.99 in bus 57. Negative sequence, bus 1 has the lowest resistance of 3.24 Ω, lowest reactance of 11.161 Ω and lowest impedance of 11.622 and bus 57 has the highest resistance of 63.95 Ω, highest reactance and impedance of 57.4 Ω and 85.92 Ω respectively. For zero sequence impedance, the lowest resistance is in bus 1 with the value of 1.076 Ω, the lowest reactance of 3.41 Ω and the lowest impedance of 3.541 Ω. The highest resistance is bus 3 with the values of 117.65 Ω, the highest reactance is bus 57 with the value of 85.89 Ω and the highest impedance in bus 3 with the value of 122.16 Ω.

Faulty Lines, Evaluation, Transmission network, Fault Sequences, Fault Phase

"ANALYSIS AND EVALUATION OF FAULTS ON A 330 KV TRANSMISSION LINE NETWORK IN SOUTHERN NIGERIA FOR IMPROVE PERFORMANCE", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.9, Issue 1, page no.e307-e313, January-2022, Available :http://www.jetir.org/papers/JETIR2201444.pdf

"ANALYSIS AND EVALUATION OF FAULTS ON A 330 KV TRANSMISSION LINE NETWORK IN SOUTHERN NIGERIA FOR IMPROVE PERFORMANCE", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.9, Issue 1, page no. ppe307-e313, January-2022, Available at : http://www.jetir.org/papers/JETIR2201444.pdf