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

Abstract

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.

Evaluation of Power System Reliability and Quality Levels for (N-2) Outage Contingency

“…The novel methodology applied in this paper is based on the original work of [20]. The reliability of a power system depends on the reliability of its individual components as well as the size and structure of the system.…”

“…The nature of the large-scale power systems causes a major problem in computational resources when numerous contingency and system operating scenarios have to be examined and analyzed [19]. The investigated reliability indices are not only useful for the design of flexible power supply reliability for customers but also beneficial to the long-term system capacity expansion planning of electric power systems [20][21]. This study contributes to the solution of the reliability indices and system quality performance problem in real power systems.…”

Electrical Power Systems Reinforcement through Overall Contingency Index Analysis and Improvement

“…The reliability index is the numerical result of the performance of an EPS [15], there being two situations: operation and failure, being safe if it supports the interruption of one of its elements and guarantees the supply of demand.…”

Probabilistic Evaluation of a Power System’s Reliability and Quality Measures

“…As has happened with many power system disciplines, the prime interest in system security, adequacy, and reliability has gradually shifted from completing and refining the theoretical basis, through developing suitable computational tools for demonstrating the capability and practicality of the methodologies, to upgrading the computational tools to handle the large-scale nature of present power systems and, finally, to relate various security, quality and reliability indices to the practical concerns of utility engineers and executives regarding supply and/or transmission deficiencies as well as the risk associated with ignoring such deficiencies [7][8][9][10]. Methods for computing probabilistic contingency-based reliability and performance quality indices have previously been published in [11][12][13][14][15][16][17]. These methods are based on a combined contingency analysis and reliability evaluation scheme which integrates both the contingency effect and its probability of occurrence into one routine of analysis [18][19].…”