Scientific and technical journal
«Environmental protection in oil and gas complex»
ISSN 2411-7013

Noise reduction of power transformers at fuel and energy complex enterprises
UDC: 502:331.45
DOI: -
Authors:

1 Rostov State Transport University, Rostov-on-Don, Russia
Keywords: power transformer, vibration and noise, cooling system, asynchronous motor, mode of spatial oscillation, electro-dynamic forces, noise from fans, periodic monitoring
Annotation:
Power transformers vibration and noise have been studied; which resulted in proving the fact that noise excess of power transformers relative to standard values is observed mainly in power transformers the operational life of which exceeds 40 years. For the appropriate use of expensive high-voltage equipment, many enterprises of the fuel and energy complex, depending on the actual condition, extend the service life of power transformers to 40 years or more, while regulating the timing of periodic monitoring and diagnostics of the main parameters of this equipment. The power transformers noise sources at industrial enterprise substations were analyzed. The results of the analysis showed that in addition to the main noise of the power transformer, caused by the magnetostriction of the magnetic circuit, additional sources of noise of the operating transformer are: the cooling system (noise from fans and oil pumps); switching under load; noise accompanying electrodynamic forces acting in the windings during sudden changes in load and its asymmetry. The author of the article presents the results of the analysis of noise sources of power transformer cooling systems, calculations of the frequencies of spatial oscillation modes of an asynchronous motor. Recommendations for reducing the noise produced by auxiliary equipment of power transformers are given. The materials presented in the article can be used when designing cooling systems for power transformers as well as developing organizational-technical measures to reduce the noise of power transformers.
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