Analysis of Power System Transient Stability of the Nigerian 330-kV Electricity Grid
Abstract
Faults on power system are inevitable and can occur at any time resulting into transient instability. Transient instability can cause loss of synchronism and possible damage to power equipment and consumer loads. Therefore, this study analyzed the transient stability (TS) of the Nigerian 330-kV, 34-bus power network. Power flow and swing equations describing the system steady and transient states were respectively analyzed using Newton-Rahpson and Runge-Kutta, fourth order numerical techniques to provide linear solution due to their non-linearity. Simulations were done and swing curves for different fault conditions obtained. The critical clearing time at which the simulated faults were cleared was determined. The results of load flow analyses revealed that buses 6, 10, 13, 14, and 17 with respective voltage magnitude of 0.937, 0.921, 0.938, 0.829 and 0.780 per unit violated voltage tolerance limit of 0.95 to 1.05 p.u. The system total active and reactive power losses were 57.62 MW and -70.62 MVar respectively. The obtained swing curve showed that for fault on bus 11 [line 9-11] generators 2, 3 and 7 lost synchronism after 1.0 s but other generators retained their stability. Similarly, for fault on bus 13 [line 10-14] generators 3 and 7 lost synchronism but other generators retained stability after 0.4 s. These results indicate that faults occurrence on generating stations of power system is unavoidable, but the clearance time must be short (few seconds) to avert total system collapse and loss of synchronism.References
Adejumobi, I. A., Mustapha, A. O., Adebisi, O.I., & Jokojeje, R. (2015). Application of STATCOM in improving power station performance: A Case Study of the Nigeria 330-kV Electricity Grid. Nigerian Advanced Journal of Technology. 34 (3), pp. 564-572. http://dx doi.org/10.4314/njt.v3413.20.
Abbas, A., Kamal, R. D., & Elmustafa, A. A. (2021). Power System Transient Stability Case Study, a power Sub- Station Plant in Sudan. World Scientific News, 158 (2021) 267-284.
Adedoku, J. L., Adejumobi, I. A., Adebisi, O. I., & Olajuwon, B. I. (2023). Frequency and Voltage Response of Gas-Fired Distributed Generation System to Load Changes under Stand- Alone and Grid- Connected Modes. LAUTECH Journal of Engineering and Technology, 17 (1), 83-95.
Hongbo, L., Shuyu, Z., Li, S., Chong, Z., & Xiongo, P. (2021). Transient Stability Analysis of the Two-Area with AC/DC Parallel Interconnected Power System in differrent Operation. Frontiers in Energy Research, 9, 1- 12. https:/doi.org/10.3389/fenrg.2021.755524.
Huimin, W. & Zhaojun, L. (2019). A review of Power System Transient Stability Analysis and Assesement. Prognostics and System Health Management Conference, 1-5. doi:10.1109/PHM- Qingdao46334.8942834.
Hussain, H. A. (2012). A Practical Method for Power Systems Transient Stability and Security. Unpublished Masters Thesis and Dissertations, University of New Orleans, pp. 114 -116. Retrieved December 12, 2020, from https://scholarworks.uno.edu/td/114. .
Karami, A. (2011). Power System transient stability Marging Estimation Using Neural Networks. International Journal of Electrical Power and Energy System 33 (4), 983-991.
https://doi.org/10.1016/j.ijepes.2011.01.012.
Latt, A. Z. (2019). Transient Stability Analysis of 3-Machine, 7 Bus System using ETAP. International Journal of Science. 8(7), 47-52. http://www.ijsciences.com. doi:10.18483/ijSci.2015.
Micheal, S. J., Simiyu, S. S., Abouelsound, A. A., & Djibrine, A. (2020). Transient Stability Analysis of the Multimachine Power System Using ETAP Software. International Journal of Electrical and Electronics Engineering Studies. 6 (1), 1-12.
Mohammed, I. A., Mohammed, M. H., Mohammed, A. M., & Tha’er O. S. (2017). Numerical Simulations for Transient Stability Analysis of Two-Machine Power System Considering Three-Phase Fault under Different Fault Clearing Times and Locations. Journal of Energy and Power, 7 (1), 22-36. doi:10.5923/j.ep.20170701.03.
Ochogwu, S.O., Atuchukwu, J., & Obi, O.K. (2019). Evaluation of Power System Stability of 330-kV Nigeria Network. Iconic Research and Engineering Journal. 3 (2), 433-438.
Odu. P. O., Ojobe, Obasi-Sam O., Lehiowo, Obojor-Ogar, & Onwe, P. D. (2023). Transient Stability Analysis of Nigeria 330-kV Power System Network Numerical Method: A case study of Calabar, Alaoji and Afam 330- kV Network. American Scientific Research Journal for Engineering. 94 (1), 97-109.
Ogboh V. C., Obute, K. C., & Anyalebechi, A. E. (2018). Transient Stability Analysis of Power Station (A Case Study of Nigeria Power Station). The International Journal of Engineering and Science. 7 (1), 20-42. doi:10.9790/1813-0708022842.
Padhi, S., & Mishra, B. P. (2015). Solution of Swing equation for Transient Stability Analysis in Dual- machine System. International Organization of Scientific Research. 5, (1), 34-39.
Qing-Hua Wu, Yuqing Lin, Chao Hug, Yinsheng Su, Tianho Wen & Yang Liu. (2023). Transient Stability Analysis of Large-Scale Power System: A Survey. CSEE Journal of Power and Energy Systems, 9, (4), 1284-1300. doi:10.17775/CSEEJPES,2022.07110..
Raj, S. & Jain, P. (2016). Comparative Study of Different Methods of Transient Stability Assessment. International Journal of Novel Research in Electrical and Mechanical Engineering. 3, (1), 14-18.
Rohan, P. & Singh, S.P. (2018). Power System Stability Analysis: A Review. International Journal of Engineering Research & Technology (IJERT). 4, (2), 1-2.
Saadat, H. (2002). Power System Analysis, Tata Mc-Graw Hill P ublishing Company Limited, New Delhi, International Editions.
Sharma, C. S. (2014). Transient Stability Analysis of Single Machine Infinite Bus System by Numerical Methods. International Journal of Electrical and Electronics Research. 2, (3), 158-166.
Shereefdeen, O. S., Josiah, H., Boyi, J., & Usman A. (2016). An Analysis of Transient Stability Enhancement Capability of UPFC in a Multi-machine Power System. FUOYE Journal of Engineering and Technology, 1 (1), 48-53. doi: https://doi.org/10.46792/fuoyejet.v1i1.19.
Sobbouhi, A. R. & Abolfazi, V. (2021). Transient Stability Prediction of Power System: a review on the methods, classification and considerations. Electric Power Systems Research. 190, 1-4. doi:10.1016/JEPSR.2021.106853.
Copyright (c) 2023 The Author(s)
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
The authors hereby represent and warrant that the paper is original and that they are the authors of the paper, except for material that is clearly identified as to its original source, with permission notices from the copyright owners where required. If in future any violation of any copyright come in notice, then the author will be responsible and not FUOYEJET.
The authors declare that:
- This paper has not been published in the same form elsewhere.
- It will not be submitted anywhere else for publication prior to acceptance/rejection by this Journal.
- A copyright permission is obtained for materials published elsewhere and which require this permission for reproduction.
Furthermore, the copyright after publication belongs to the Author(s) (for articles published in 2020 and beyond) and licensed under the creative commons license CC-BY-NC (http://creativecommons.org/licenses/by-nc/4.0). The copyright covers the right to reproduce and distribute the article, including reprints, translations, photographic reproductions, microform, electronic form (offline, online) or any other reproductions of similar nature.
