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Power System Reliability Method

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Assessment of Power System Reliability

Abstract

The electric power system reliability can be assessed based on the configuration of the system, based on the reliability of the components of the system, and based on the viewpoint of power delivery to the loads of the power system. The reliability of the power system is defined from its complement, i.e., unreliability. Unreliability of the power delivery to the ith load can be assessed as the top-event probability of the respective fault tree analysis. Consideration of each of the loads can be done as consideration of a subsystem. Evaluation of subsystems represents the input to the evaluation of the overall power system. The unreliabilities of power delivery to the loads of the system are considered as weighted to get the overall measure of the power system reliability. The method bases on the fault tree features. It is described on small examples. The prerequisite for the method development is the representation of the system topology. The nodes of the network and their connections are represented by the buses in the power system and the power lines between the buses. When the system topology is defined, the functional tree of power flow paths is developed. When the functional tree of power flow paths is developed, fault tree is constructed and analyzed. The prerequisite for the quantitative analysis is collection of data about the failure probabilities of modeled equipment. Sources of databases are mentioned. Examples are given.

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Authors and Affiliations

  1. Faculty of Electrical Engineering, University of Ljubljana, Trzaska 25, 1000, Ljubljana, Slovenia

    Marko Čepin

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  1. Marko Čepin
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Correspondence to Marko Čepin .

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Čepin, M. (2011). Power System Reliability Method. In: Assessment of Power System Reliability. Springer, London. https://doi.org/10.1007/978-0-85729-688-7_15

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  • DOI: https://doi.org/10.1007/978-0-85729-688-7_15

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  • Print ISBN: 978-0-85729-687-0

  • Online ISBN: 978-0-85729-688-7

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