Power Flow Analysis Using Load Tap – Changing Transformer (LTCT): A Case Study of Nigerian 330kv Transmission Grid System
Adebayo I.G.1, Adejumobi, I.A.2, Adepoju, G.A.3
1Adebayo I.G., Department of Electronic and Electrical Engineering, Ladoke Akintola University of Technology, Ogbomoso, Nigeria.
2Adejumobi, I.A., Department of Electrical and Electronic Engineering, Federal University of Agriculture, Abeokuta, Nigeria.
3Adepoju, G.A., Department of Electronic and Electrical Engineering, Ladoke Akintola University of Technology, Ogbomoso, Nigeria.
Manuscript received on January 23, 2013. | Revised Manuscript received on February 12, 2013. | Manuscript published on February 28, 2013. | PP: 230-237 | Volume-2 Issue-3, February 2013. | Retrieval Number: C1074022313 /2013©BEIESP
Open Access | Ethics and Policies | Cite
© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: In order to ensure that electrical power transfer from generator to consumers through the grid system is stable, reliable and economical , it becomes imperative to carry out power flow studies. This paper presents power flow solution incorporating load tap changing transformer (LTCT) for solving the steady-state problems of longitudinal power system using Nigerian 330kV transmission system as a case study . In this work, the adopted numerical technique for solving the power flow problems was the Newton Raphson iterative algorithm. Modified power flow algorithm was implemented by the application of voltage control method using a load tap changing transformer (LTCT). Simulations were done using MATLAB software package .The results obtained from the existing condition of the Nigerian 330 kV transmission Network indicate that the bus voltages at New Heaven (0.929p.u), Gombe (0.886p.u), and Kano(0.880p.u) were below the set of binding limits that is, 10% tolerance. With the incorporation of LTCT, voltage magnitudes of 0.995p.u, 0.950p.u and 0.996p.u were obtained at New Heaven, Gombe and Kano respectively, while the total system active power loss on the transmission line also reduced by about 5.1%.
Keywords: Power Flow, LTCT, Power system, Active Power loss, Voltage magnitude.