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 Volume 6, Issue 11 (November 2019), Pages: 68-74


 Original Research Paper

 Title: Evaluation of power system reliability levels for (n-1) outage contingency

 Author(s): Badr M. Alshammari *


 Electrical Department, College of Engineering, University of Ha’il, Saudi Arabia

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 * Corresponding Author. 

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Throughout the world, power utilities have been struggling relentlessly with the delicate balance between cost and security/reliability. The experience gained by the power utilities at the Kingdom of Saudi Arabia has been similar to that of many public and private utilities around the world. In conjunction with energy conservation, power system security and reliability evaluation has grown to constitute a subject of prime interest. This paper presents, illustrative practical applications to evaluate power System reliability based on the (n-1) contingency. Therefore, the methodology is demonstrated in this paper, is based on combined between the evaluation of the reliability indices and contingency analysis. The methodology has been successfully applied to portions of a practical power system representing the Saudi electricity grid, where composite system performance reliability indices have been evaluated. The model System which is used contains hundreds of buses and tens of complex stations and analyzed using advanced and numerically effective large-scale computer scheme. 

 © 2019 The Authors. Published by IASE.

 This is an open access article under the CC BY-NC-ND license (

 Keywords: Power system reliability, Contingency, Large-scale system, Power system

 Article History: Received 9 February 2019, Received in revised form 2 September 2019, Accepted 5 September 2019


This research work was supported by University of Ha’il.

 Compliance with ethical standards

 Conflict of interest:  The authors declare that they have no conflict of interest.


 Alshammari BM (2019). Evaluation of power system reliability levels for (n-1) outage contingency. International Journal of Advanced and Applied Sciences, 6(11): 68-74

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