Voltage Quality Analysis on Power Transmission Networks: A Case Study of 330kV Power Transmission Networks in Nigeria

The 330kV power transmission system in Nigeria is associated with numerous problems ranging from voltage instability, ageing network, long and weak lines insulators, absence of protection schemes on the distribution lack spinning reserve to compensate for shortages, obsolete substation equipment, higher losses which substantially affect reliability supply Nigeria. This study aimed at analysing this scenario propose stability improvement measures Network. Voltage instability a major factor responsible several collapse blackout experienced country. work used necessary data obtained National Control Centre (NCC) Transmission Company (TCN) load flow simulation help MATLAB R2021a software. Newton-Raphson iterative technique was carry out analysis due its ability converge faster less iteration than Gauss-seidel fast decoupled techniques. results revealed that buses 4 (Akangba), 5 (Jos), 7 (Ikeja-west), 10 (Alagbon), 19 (Damaturu), 23 (Sakette), 28 (Ajah), 33 (Oke-Aro), 34 (Ayede) 42 (Lekki) violate acceptable limits as magnitude falls below standard limit 0.95-1.05pu. It also observed 6 (Kaduna), 13 (Yola), 16 (Gombe), 22 (Kano) are close point their magnitudes between 0.95 0.96 pu. These need urgent compensation if entire Nigerian be achieved.