Issue №: 2 (129)
The journal solves the problems of creation and improvement of machinery and technologies for agriculture: 131 - Applied Mechanics, 132 - Materials Science, 133 - Industrial Engineering, 141 - Power Engineering, Electrical Engineering and Electromechanics, 208 - Agricultural Engineering.
METHOD AND MEANS OF MONITORING THE THERMAL STATE OF ROTOR WINDINGS OF A POWER GENERATOR
Valerii HRANIAK – Candidate of Technical Sciences, Associate Professor, Associate Professor of the Department of Mathematics and Informatics, Mykhailo Kotsiubynskyi Vinnytsia State Pedagogical University (32, Ostrozkogo St., Vinnytsia, 21008, Ukraine, e-mail: titanxp2000@ukr.net, https://orcid.org/0000-0001-6604-6157).
Oleh HAYDAMAK – Candidate of Technical Sciences, Associate Professor, Associate Professor of the Department of Power engineering, electrical engineering and electromechanics of Vinnitsa National Agrarian University (3 Soniachna St., Vinnitsa, Ukraine, 21008, e-mail: haidamak@vsau.vin.ua, https://orcid.org/0000-0001-5116-6017).
The article addresses the issue of detecting inter-turn insulation defects in the field windings of a power generator rotor at early stages of their development, which is critically important for ensuring the reliable and safe operation of power equipment. A new thermal diagnostic method is proposed, based on measuring the coolant temperature in the end region of the rotor's cooling system. When combined with correction coefficients for temperature rise in individual excitation windings, this approach enables highly accurate identification of local overheating zones. This, in turn, serves as an indicator of the presence of inter-turn insulation defects, regardless of their formation mechanism—whether due to partial discharges, mechanical damage, or thermal aging. A key advantage of the method lies in its capability to diagnose insulation defects early, before they reach a critical stage, allowing maintenance to be carried out before significant deterioration in operational characteristics occurs.
In addition, a structural diagram of a new control device has been developed to implement the proposed method. A major feature of this design is the non-contact nature of temperature measurement of the field windings, which eliminates the influence of additional components on rotor balancing and avoids introducing asymmetry into its mechanical structure. The use of a synchronization system ensures high precision in spatial positioning and selective temperature measurement at specific monitored points, providing maximum in formativeness and diagnostic value of the obtained data. The proposed approach can be effectively integrated into modern condition monitoring systems for power units, thereby enhancing the overall safety and reliability of the equipment. The research results open new prospects for further development of thermal diagnostic methods in the field of power engineering, particularly for complex objects with limited access to structural elements during operation.
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About journal
The magazine "Engineering, Energy, Transport AIC" is included in the list of scientific professional editions of Ukraine on technical sciences
(Category "Б", Order of the Ministry of Education and Science of Ukraine dated 02.07.2020 №886)
According to the decision of National Council of Television and Radio Broadcasting of Ukraine from 25.04.2024 No. 1337 the scientific journal «Engineering, Energy, Transport AIC» has the ID of the Media R30-05173.
The journal "Engineering, Energy, Transport AIC" is indexed according to the following databases and catalogs:
Certificate of state registration of mass media: No. 21906-11806 P dated 03/12/2016.
Founder of the journal: Vinnytsia National Agrarian University
Type of publication: journal
Kind of publication: scientific
Publication status: domestic
Year of foundation: 1997
Periodicity: 4 times per year
Volume: 18-20 conv. print. sheet (А4)
ISSN: 2520-6168 (print version), (online version)
Language of publication: (mixed languages) Ukrainian, English
The sphere of distribution and category of readers: national, foreign, faculty, scientists, entrepreneurs.
The periodical edition is included to the List of scientific professional publications of Ukraine on technical sciences, approved by order of the Ministry of Education and Science of Ukraine in 05.16.2016, No. 515.
The journal "Engineering, Energy, Transport AIC" is included in the "Catalog of Ukrainian Publications".
Subscription to the journal can be issued in each post office. The subscription index is 99720.
Technology, energy, agriculture transport AIC is a scholarly professional journal with a long-standing history and stable academic tradition, reflecting the evolution of engineering and technical sciences within the agro-industrial sector of Ukraine.
The journal was founded in 1997 under the title Bulletin of Vinnytsia State Agricultural Institute. According to the Resolution of the Presidium of the Higher Attestation Commission of Ukraine dated September 11, 1997, the publication obtained the status of a professional scientific journal, which enabled the publication of the main results of doctoral and candidate dissertations in technical sciences. From its inception, the journal positioned itself as an academic platform for addressing current issues of mechanization, electrification, and technical support of agricultural production.
During 2001–2014, the journal was published under the title Proceedings of Vinnytsia National Agrarian University. Series: Technical Sciences (State Registration Certificate of Print Media KV No. 16644-5116 PR dated April 30, 2010). Throughout this period, a systematic approach to the selection and peer review of scientific manuscripts was established, the thematic scope of publications was expanded, and continuity of scientific directions as well as the development of sectoral engineering schools was ensured.
Since 2015, the journal has been published under its current title, Technology, energy, agriculture transport AIC (State Registration Certificate No. 21906-11806 R dated March 12, 2016). The change of title reflected the expansion of the journal’s thematic coverage and its orientation toward interdisciplinary research in mechanical engineering, energy systems, electrical engineering, transport technologies, automation, and digital solutions for the agro-industrial complex.
The journal consistently adheres to the principles of open science. All published materials are distributed under the Creative Commons Attribution 4.0 International License (CC BY 4.0), ensuring open access to research results provided proper attribution to the authors and the original publication is maintained.
At present, Technology, energy, agriculture transport AIC is an authoritative professional scientific journal (Category B), providing a platform for the publication of fundamental and applied research results, promoting the integration of education, science, and industry, and contributing to the advancement of engineering and technological support of the agro-industrial complex of Ukraine.
