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DOI: 10.15507/2658-4123.035.202504.808-824

UDK 53:519.7

 

Specific Indicators of the Consequences of Outages in 110 kV Electrical Networks

 

Alina V. Vinogradova
Cand.Sci. (Eng.), Leading Researcher at the Laboratory of Power Supply, Electrical Equipment and Renewable Energy, Federal Scientific Agroengineering Center VIM (5 Institutsky Passage 1st, Moscow 109428, Russian Federation); Associate Professor of the Department of Power Supply, Orel State Agrarian University (69 Generala Rodina St., Orel 302019, Russian Federation); associate Professor of the Department of Power Supply and Thermal Power Engineering, Russian State Agrarian University – Moscow Timiryazev Agricultural Academy (49 Timiryazevskaya St., Moscow 127434, Russian Federation), ORCID: https://orcid.org/0000-0002-8935-7086, Scopus ID: 57204152403, SPIN-код: 8836-8684, This email address is being protected from spambots. You need JavaScript enabled to view it.

Alexander V. Vinogradov
Dr.Sci. (Eng.), Associate Professor, Professor of the Department of Power Supply, Orel State Agrarian University (69 Generala Rodina St., Orel 302019, Russian Federation); Professor of the Department of Power Supply and Thermal Power Engineering, Russian State Agrarian University – Moscow Timiryazev Agricultural Academy (49 Timiryazevskaya St., Moscow 127434, Russian Federation), ORCID: https://orcid.org/0000-0002-8845-9718, SPIN-код: 6652-9426, This email address is being protected from spambots. You need JavaScript enabled to view it.

Angela K. Bukreeva
Cand.Sci. (Eng.), Research Associate, Laboratory of Power Supply, Electrical Equipment and Renewable Energy, Federal Scientific Agroengineering Center of VIM (5 Institute Proezd 1st, Moscow 109428, Russian Federation), ORCID: https://orcid.org/0000-0002-8582-1080, SPIN-код: 4079-4380, This email address is being protected from spambots. You need JavaScript enabled to view it.

 

Abstract
Introduction. Comparing the effects of outages in electrical networks of different voltage classes is important for developing strategies for their design and construction. The main scientific problem when choosing such strategies arises from the contradiction between the need to increase the reliability of equipment and structures of electrical networks of all voltage classes and to minimize capital investments and operating costs. A comparison based on specific indicators is more visual and makes it possible to scale the results obtained. Thus, it is an urgent task to assess the specific indicators of the consequences of outages in 110 kV electrical networks for their subsequent comparison with similar indicators for networks of other voltage classes.
Aim of the Study. The study is aimed at conducting a comparative analysis of specific reliability indexes characterizing the consequences of outages in 110 kV and 0.4 kV electrical networks.
Materials and Methods. There were analyzed the statistical data of emergency and planned outages in 110 kV electrical networks in the Oryol region for the period from 2018 to 2023. The initial data were taken from the outage log books for the branch of PJSC Rosseti Centre – Oryolenergo. The total length of the electrical networks considered was more than 1.7 thousand kilometers. Specific reliability indexes characterizing the consequences of outages in 110 kV electrical networks were determined and compared with similar indexes for 0.4 kV electrical networks.
Results. The study revealed that the consequences of emergency outages in the 110 kV electrical networks in terms of specific disconnected electrical power indicator per one outage in 110 kV electrical networks are on average about 50 times greater than the consequences of outages in the 0.4 kV electrical networks and taking into account all causes of outages – 17.5 times. The average specific time of emergency interruptions per one outage in 0.4 kV electrical networks is more than 5 times greater than in 110 kV electrical networks. Specific undersupply of electrical power per one consumer in 0.4 kV electrical networks is greater than in 110 kV electrical networks by more than 2,160 times taking into account all causes of disconnections while specific electrical power undersupply per outage disconnection in 0.4 kV electrical networks is 18 times greater. The average total undersupply of electrical power for all reasons in 0.4 kV electrical networks is more than 7,500 times greater than the same indicator for 110 kV electrical networks.
Discussion and Conclusion. The total annual consequences of accidents in 0.4 kV electrical networks are greater than the consequences of accidents in 110 kV electrical networks. It is necessary to revise the design standards for 0.4 kV electrical networks increasing the requirements for the reliability of their design and creating opportunities for configuration management, primarily for the purpose of automatic standby electrical power supply to consumers. This will significantly reduce damage to both rural consumers and power grid operators.

Keywords: power grids, specific reliability indexes, 110 kV electrical networks, 0.4 kV electrical networks, statistical data, number of outages, electrical power undersupply, electrical power supply, reliability of electrical power supply, consequences of outages

Conflict of interest: the authors declare that there is no conflict of interest.

For citation: Vinogradova A.V., Vinogradov A.V., Bukreeva A.K. Specific Indicators of the Consequences of Outages in 110 kV Electrical Networks. Engineering Technologies and Systems. 2025;35(4):808–824. https://doi.org/10.15507/2658-4123.035.202504.808-824

Authors contribution:
A. V. Vinogradova – formulating the study idea, goals and objectives; conducting the study, including conducting experiments and collecting data; preparing the manuscript: writing a draft of the manuscript.
A. V. Vinogradov – supervision, leadership and mentoring in the process of planning and conducting research; formulating the study ideas, goals and objectives; conducting the study, including conducting experiments and collecting data; creation preparing the manuscript: critical analysis of the draft manuscript, comments and corrections by members of the research team, including at the stages before and after publication.
A. K. Bukreeva – conducting the study, including conducting experiments and collecting data; preparing the manuscript: writing a draft of the manuscript.

All authors have read and approved the final manuscript.

Submitted 14.03.2025;
revised 19.09.2025;
accepted 24.09.2025

 

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