Development of a method for reliability assessment of distribution power networks up to 110 kV

Authors

DOI:

https://doi.org/10.15587/1729-4061.2025.322920

Keywords:

distribution networks, power reliability, Markov processes, redundancy assessment, failure rate

Abstract

The study focuses on the reliability assessment of distribution power networks operating at voltages up to 110 kV, addressing the challenges of increasing loads, aging infrastructure, and the integration of renewable energy sources. A novel method and model for reliability assessment are proposed, incorporating failure rates, recovery times, and topological characteristics of networks. The research identifies critical factors influencing network reliability, including the level of redundancy, operational conditions, and climatic impacts. Notable findings show that network points with multiple feeder connections demonstrate the highest reliability, exceeding 99.99 %, while those with single-transformer configurations are the most vulnerable to failures. The average failure rate for overhead lines is calculated at 1.29 failures per 100 km annually, with recovery times reaching up to 40 hours for critical nodes.

The results are explained by the interplay of structural and operational factors, where redundancy significantly enhances reliability, and outdated equipment increases vulnerability. The study’s distinguishing feature lies in its use of Markov processes to dynamically model failures and recoveries, offering a comprehensive framework compared to traditional static methods. The practical applications of the results include improving network design through enhanced redundancy, optimizing maintenance strategies for critical elements, and supporting the integration of Smart Grid technologies. These findings contribute to the development of more resilient and efficient power distribution networks, adaptable to modern operational demands

Author Biographies

Fariza Abilzhanova, Abylkas Saginov Karaganda Technical University

Master of Engineering Sciences, PhD Student

Department of Energy Systems

Felix Bulatbaev, Abylkas Saginov Karaganda Technical University

Candidate of Technical Sciences, Associate Professor

Department of Energy Systems

Aizada Kuanyshtaeva, Abylkas Saginov Karaganda Technical University

PhD Student

Department of Automation of Production Processes

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Development of a method for reliability assessment of distribution power networks up to 110 kV

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Published

2025-02-27

How to Cite

Abilzhanova, F., Bulatbaev, F., & Kuanyshtaeva, A. (2025). Development of a method for reliability assessment of distribution power networks up to 110 kV. Eastern-European Journal of Enterprise Technologies, 1(8 (133), 15–23. https://doi.org/10.15587/1729-4061.2025.322920

Issue

Vol. 1 No. 8 (133) (2025): Energy-saving technologies and equipment

Section

Energy-saving technologies and equipment

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Copyright (c) 2025 Fariza Abilzhanova, Felix Bulatbaev, Aizada Kuanyshtaeva

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