Contingency Analysis for Assessing Line Losses in Nigeria 330-kV Power lines
Ademola Abdulkareem1, Awosope C. O. A.2, Samuel I.3, Agbetuyi A. F4
1Ademola Abdulkareem, Lecturer/Researcher, Department of Electrical and Information Engineering, College of Engineering, Covenant University, Ota, Nigeria.
2Awosope C. O. A, Lecturer/Researcher, Department of Electrical and Information Engineering, College of Engineering, Covenant University, Ota, Nigeria.
3Samuel I, Lecturer, Department of Electrical and Information Engineering, College of Engineering, Covenant University, Ota, Nigeria.
4Agbetuyi A. F, Lecturer, Department of Electrical and Information Engineering, College of Engineering, Covenant University, Ota, Nigeria.
Manuscript received on 15 February 2016 | Revised Manuscript received on 25 February 2016 | Manuscript Published on 28 February 2016 | PP: 66-79 | Volume-5 Issue-3, February 2016 | Retrieval Number: C4419025316/16©BEIESP
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© 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: Line losses in transmission lines constitute one of the major problems affecting power generation and distribution systems. Losses have been found to affect the overall efficiency of a system. Therefore, to increase the efficiency of any system, losses must be minimized. This paper carried out a comprehensive study and analysis of line losses associated with Nigeria 330-kV power transmission lines. The work includes the power-flow analysis carried out on the existing network using both the Newton-Raphson (N-R)written in code-based MATLAB and the model-based N-R in Power World Simulator (PWS) environment. The power-flow analysis was further subjected to contingency analysis and simulation using the N-R in PWS. Two load-flows were performed to reveal voltage violated buses.The results showed that the bus voltages outside the statutory limit of 0.95 – 1.05p.u(i.e 313.5 – 346.5kV) occurred at buses2-BirninKebbi (0.9183pu), bus 9 Akangba (0.937pu), bus 18-Onitsha (0.935pu), bus 20-New-Haven (0.920pu), bus 25- Kaduna (0.9233pu), bus 26-Kano (0.776pu), bus 22-Jos (0.8192pu) and bus 28-Gombe (0.7247pu) under normal uncompensated condition. Capacitive shunt compensation was applied on these buses and the results recorded appreciable loss reduction (about 18.35%). The result of the single line contingency analysis for uncompensated and compensated indicates a total of 335 and 25 voltage bus violations respectively.
Keywords: Line Losses, Power Line, Power-Flow Analysis, Voltage Violations, Compensation, Contingency Analysis
Scope of the Article: Structural Reliability Analysis