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 the journal
G8 – Materials Science
G9 – Applied Mechanics
G10 – Metallurgy
G11 – Mechanical Engineering (by specializations)
The journal "Engineering, Energy, Transport AIC" is indexed according to the following databases and catalogs:
The All-Ukrainian scientific journal “Technology, energy, agriculture transport AIC” is an open-access scientific publication that publishes the results of original research, theoretical and applied developments, as well as scientific papers in the fields of engineering sciences, energy systems, and transport technologies of the agro-industrial complex.
The main objective of the scientific journal “Technology, energy, agriculture transport AIC” is to disseminate the results of modern scientific research and to promote the development of technical, energy, and transport solutions for the agro-industrial complex through the publication of scientific materials characterized by scientific novelty and practical significance in the field of design and modernization of machinery, equipment, and technologies.
The journal’s activities are focused on supporting the development of engineering science, stimulating the implementation of innovative approaches into industrial practice, as well as ensuring effective exchange of scientific achievements among researchers, educators, engineers, and other specialists in relevant fields.
Objectives of the Journal
To achieve its defined objective, the journal ensures the implementation of the following key tasks:
· publication of the results of fundamental and applied research covering the fields of applied mechanics, mechanical engineering, materials science, energy systems, electrical engineering, electromechanics, and transport systems of the agro-industrial sector;
· promotion of the implementation of advanced technical and technological developments aimed at improving the efficiency of machinery, equipment, and production processes;
· creation of conditions for active scientific exchange among research institutions, higher education institutions, industrial enterprises, and other interested organizations;
· support for the development of interdisciplinary research and expansion of cooperation among specialists in various fields of science and technology;
· promotion of the improvement of the scientific and technical level of research related to the design, modernization, and operation of technical equipment used in agro-industrial production;
· dissemination of information on modern achievements in science and technology and the implementation of innovative technologies in the fields of technical support, energy, and transport;
· development of a scientific information environment that facilitates effective scientific communication and the integration of national research into the international scientific community.
Publication frequency: 4 issues per year
Languages of publication: Ukrainian, English
Editor-in-Chief: Vitalii YAROPUD
State Registration: Decision of the National Council of Ukraine on Television and Radio Broadcasting № 1337 and № 1180. Media Identifier: R30-05173
EDRPOU Code: 00497236
Publisher ROR: https://ror.org/05m3ysc06
Publisher DOI Prefix: 10.37128
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.
