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INVESTIGATION OF LOW - FREQUENCY NOISE EMITTED BY POWER TRANSFORMER
Abstract
The subject area of this article applies to a study of low frequency noise - mainly infrasound signals generated by the operational indoor power transformer. The object of the study is localized in south Poland with a total apparent power equal to 1250 kVA. In addition, the power transformer is located away from national roads and motorways. Scope of the performed analysis includes designation of time runs, depicting temporal changes, and designation of frequency spectra of the recorded low frequency signals. Evaluation of the impact of acoustic background on surrounding was made. Moreover, the scope of the analysis, performed in this field, concerned assessment of the impact of meteorological parameters related to the applied measurement system on obtained results. Values obtained from measurements were related to and compared with the limits specified in standards and regulations existing in this field. The test results show that the transformer emits noise in the infrasound and low frequency band, but their level is lower than law limits.
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References6
Jancarczyk D., Research and Analysis of Infrasound Noise Emitted by Power Transformers, Electrical Engineering Poznan University of Technology Academic Journals, Polnad, 2018 (in Polish);
Boczar T., Malec T., Wotzka D., Studies on Infrasound Noise Emitted by Wind Turbine of Large Power, Acta PhysicaPpolonica No. 5, Vol. 122, 2012;
PN-EN 60076-10, Transformers. Part 10: Determination of sound loss;
Jancarczyk D., Bernaś M., Sidzina M., Janusz J., Comparative Analisis of Infrasound Noise Emitted by Power Transformers, The Scientific Papers of Faculty of Electrical and Control Engineering Gdansk University of Technology Nr 59, Poland, 2018 (in Polish);
Borucki S., Boczar T., Cichon A., Technical Possibilities of Reducing the Sound Pressure Level Emitted into the Environment by a Power Transformer, Archives of Acoustics 36, 1, 2011;
Zawieska W., A Power Transformer as a Source of Noise, International Journal of Occupational Safety and Ergonomics (JOSE) 2007, Vol. 13, No. 4, pp 381–389.
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Number of times cited according to Crossref: 1
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