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Identification of System Exposure for the Northwest Region of Ethiopian Electric Power

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Abstract

Power system contingency is an operational state that can happen as a result of a system discontinuity and results in overall system voltage instability. The system has seen intermittent power outages in previous years, according to Ethiopia Electric Power. Parts of the grid system were disrupted during the event, and as a result, there was a partial blackout of the system. Therefore, research proposes identifying the system's exposure to lessen the likelihood of such accidents happening. The proposed method demonstrated on 15 bus system Northwest region of Ethiopia Electrical Power Network using DigSILENT software. System’s exposure was evaluated by using the voltage performance index and the overload performance index. The indices enable the evaluation of two distinct system stress signs, including voltage instability and overloads. Performance index data show that the BDII230 bus to the GoII bus line has highest performance index value (4.9488) from other for N-1 line outage circumstances. This indicates that BDII230 bus to the GoII is most dangerous line for interruption of Northwest region of Ethiopian Electric Power network. But the most sensitive bus for voltage limit violations on this condition are Gondar load bus and Metema load bus. Their voltage profile is 0.908 and 0.923 per unit, respectively. Also, for 50% load demand increasing conditions, Gondar load bus has highest performance index value (20.2352) compared to the other load buses and its voltage profile is 0.8879 per unit. So, applying performance index for Northwest region of Ethiopia Electric Power network is used to know the system performance such as voltage instability and overloading, for forecasting future operation and expansion planning of this area.

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Data Availability

The corresponding author can provide the datasets used in this study upon reasonable request.

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Acknowledgements

We would like to thank the Northwest region of contributed to the analysis and interpretation of the results as well as the writing of the manuscript. Finally, before submission, the final paper was reviewed and approved by all authors. The Ethiopian Electric Power office for allowing this data to be collected. We would also like to thank Mizan Tepi University for assisting us in collecting data and conducting this study.

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This study received no funding.

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Authors and Affiliations

  1. College of Engineering and Technology, Department of Electrical and Computer Engineering, Mizan-Tepi University, Mizan Teferi, Ethiopia

    Mebratu Sintie Geremew

  2. Faculty of Electrical and Computer Engineering, Debre Markos University, Debre Markos, Ethiopia

    Yalew Gebru Workie

  3. Department of Electrical and Computer Engineering, University of Gondar, Gondar, Ethiopia

    Lidia Bitew Techane

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  1. Mebratu Sintie Geremew
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  2. Yalew Gebru Workie
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  3. Lidia Bitew Techane
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Contributions

M.S.G helped in study conceptualization, study design, gathering the data, doing the analysis and interpretation of the findings, and writing the manuscript. Y.G.W and L.B.T contributed to the analysis and interpretation of the results as well as the writing of the manuscript. Finally, before submission, the final paper was reviewed and approved by all authors.

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Correspondence to Mebratu Sintie Geremew.

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Geremew, M.S., Workie, Y.G. & Techane, L.B. Identification of System Exposure for the Northwest Region of Ethiopian Electric Power. Iran J Sci Technol Trans Electr Eng (2024). https://doi.org/10.1007/s40998-024-00698-x

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  • DOI: https://doi.org/10.1007/s40998-024-00698-x

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