Abstract
One of the main objectives of electric power utilities keeping up a continuous and adequate power supply to the customers at a sensible cost. This paper contributes to the solution of the reliability and quality assessment problems in power systems, using the (N-2) outage contingency scenario to evaluate power system’s reliability and quality levels. Therefore, the methodology presented in this paper is based on the integration of reliability measures, quality indices, and contingency analysis. While reliability formulas have traditionally been applied to small and illustrative power systems, large-scale reliability and quality assessment go far beyond direct implementation of formulas. Systems with hundreds of buses and tens of complex stations can only be analyzed using advanced and numerically effective large-scale algorithms for reliability and quality assessment as demonstrated in this paper.
Highlights
Power system reliability is defined as the probability of an electric power system to perform a required function under given conditions for a given time interval
An electric power network containing generation and transmission facilities could be divided into several states in terms of the degree to which adequacy and security constraints are satisfied in a reliability evaluation of the composite system [4,5]
Power system reliability evaluations have been concentrated on the analysis of system adequacy, the ability to supply all loads within performance requirements [6,7,8]
Summary
Power system reliability is defined as the probability of an electric power system to perform a required function under given conditions for a given time interval. An electric power network containing generation and transmission facilities could be divided into several states in terms of the degree to which adequacy and security constraints are satisfied in a reliability evaluation of the composite system [4,5]. Most of the traditional contingency assessment methods do exclude the probability of contingency in the analysis They rather define a so-called set of credible contingencies, which are considered in the evaluation. The computational scheme presented in this paper can effectively assess a composite system’s reliability and power quality, analyzes the network structure, generation and load balance, evaluates various composite system performance reliability indices applied to the system subject to (N-2) contingency with certain or random occurrences. A practical application to a portion of the Saudi power grid is presented in this paper for demonstration purposes
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