Diagnostics of the technical state of high-voltage equipment under operating voltage

Authors

DOI:

https://doi.org/10.15587/2706-5448.2025.325777

Keywords:

online monitoring systems, transformer oil, accident prevention, dissolved gas analysis, partial insulation breakdown

Abstract

The object of research is systems for online monitoring of the technical condition of oil-filled high-voltage electrical equipment during operation, which are used for automated diagnostics of the technical condition of equipment, resource forecasting and reducing of accidents.

The work is devoted to finding opportunities to reduce the cost of online monitoring systems, taking into account the military situation in Ukraine. The problem is caused by the need to use such systems to increase personnel safety and reliability of power grids, reduce the risk of failures due to deterioration of the technical condition of equipment due to unforeseen resource depletion or accelerated development of hidden defects due to military actions (excessive short-circuit currents, overvoltage). But taking into account the fact that the restoration of the power structure of Ukraine takes place in conditions of limited financial resources, one of the important tasks is to use online monitoring systems with an optimal price/diagnostic capabilities ratio to ensure the required level of diagnostics with a reduction in material costs for such systems.

The paper presents the results of an analytical study of the operation of online monitoring systems operated at various facilities over the past 20 years. The approach to diagnostics under operating voltage proposed in this study is aimed, first of all, at preventing emergency situations caused by the most frequent causes of accidents associated with: partial breakdown of capacitor insulation, increase in relative moisture saturation of transformer oil, appearance of dissolved gases in oil. The use of such an approach will increase the reliability of the power infrastructure and improve fault detection and preventive maintenance strategies while reducing the costs of organizing automated diagnostics in relation to “full-range” online monitoring systems of high-voltage equipment, which have been actively installed in Ukraine in recent years.

Author Biographies

Oleksandr Sakhno, “ENERGY AUTOMATION” LLC

PhD, Executive Director, Chief Electrician

Liudmyla Skrupska, National University «Zaporizhzhia Polytechnic»

Department of Electrical and Electronic Apparatus

Kostiantyn Odiyaka, National University «Zaporizhzhia Polytechnic»

Department of Electrical and Electronic Apparatus

Volodymyr Vasylevskyi, National University «Zaporizhzhia Polytechnic»

PhD

Department of Electrical and Electronic Apparatus

Serhii Shylo, National University «Zaporizhzhia Polytechnic»

Department of Electrical and Electronic Apparatus

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Diagnostics of the technical state of high-voltage equipment under operating voltage

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Published

2025-03-31

How to Cite

Sakhno, O., Skrupska, L., Odiyaka, K., Vasylevskyi, V., & Shylo, S. (2025). Diagnostics of the technical state of high-voltage equipment under operating voltage. Technology Audit and Production Reserves, 2(1(82), 35–44. https://doi.org/10.15587/2706-5448.2025.325777

Issue

Vol. 2 No. 1(82) (2025): Industrial and technology systems

Section

Electrical Engineering and Industrial Electronics

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Copyright (c) 2025 Oleksandr Sakhno, Liudmyla Skrupska, Kostiantyn Odiyaka, Volodymyr Vasylevskyi, Serhii Shylo

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