Archives of Acoustics, 45, 1, pp. 165–175, 2020
10.24425/aoa.2020.132492

Analysis of the Usefulness of Measurement on a Board at Ground Level for Assessing the Noise Level from a Wind Turbine

Tadeusz WSZOŁEK
AGH University of Science and Technology in Krakow
Poland

Paweł PAWLIK
AGH University of Science and Technology in Krakow
Poland

Dominik MLECZKO
AGH University of Science and Technology in Krakow
Poland

Jagna CHRONOWSKA
AGH University of Science and Technology in Krakow
Poland

The specific working conditions of the wind turbine in strong wind cause a number of problems in the measurement of noise indicators used in its short and long-term assessment. The wind is a natural working environment of the turbine, but it also affects the measurement system, moreover, it can be a secondary source of other sounds that interfere with the measurement. One of the effective methods of eliminating the direct impact of wind on the measurement system is placing the microphone on the measurement board at ground level. However, the obtained result can not be directly compared with the admissible values, as it has to be converted to a result at a height of 4 m. The results of previous studies show that this relation depends, inter alia, on the speed and direction of the wind. The paper contains the results of measurements on the measurement board, according to EN 61400-11:2013, and at a height of 4 m above ground made simultaneously in three points around the 2 MW turbine at various instantaneous speeds and changing wind directions. Analysis of the impact of measuring point location on the measurement result of noise indicators and the occurrence of additional features affecting the relationship between the values measured on the board and at the height of 4 m, and especially the tonality, amplitude modulation and content of low frequency content, was made.
Keywords: wind turbine noise; amplitude modulation; acoustical measurements; environmental acoustics
Full Text: PDF

References

Egedal R., Søndergaard L.S., Hansen M.B. (2017), Wind turbine noise at neighbor dwellings, comparing calculations and measurements, [In:] INTER-NOISE and NOISE-CON Congress and Conference Proceedings, Vol. 255, No. 2, pp. 5034–5045.

EN 61400-11:2013. Wind turbine generator systems. Part 11. Acoustic noise measurement techniques (IEC 61400-11:2012).

Gamesa G87-2MW (n.d.), https://en.wind-turbine-models.com/turbines/548-gamesa-g87 (retreived February 12, 2019).

Golec M., Golec Z., Cempel C. (2006), Noise of wind power turbine VESTAS V80 in a farm operation, Diagnostyka’1 (37)/2006.

Hansen K., Zajamsek B., Hansen C. (2013), Evaluation of secondary windshield designs for outdoor measurement of low frequency noise infrasound, 5th International Conference on Wind Turbine Noise, Denver, August 28–30, 2013 (CD)

ISO 1996-2:2017, Acoustics – Description, measurement and assessment of environmental noise – Part 2: Determination of sound pressure levels.

Journal of Laws (2008), Regulation of the Minister of Environment of 4 November 2008 on requirements in scope of carrying out measurements of emissions and measurements of water intake, Journal of Laws 2008, No. 206, item 1291.

Kendrick P., von Hünerbein S., Cox TJ. (2016), The effect of microphone wind noise on the amplitude modulation of wind turbine noise and its mitigation, The Journal of the Acoustical Society of America, 140(1): EL79–EL83, doi: 10.1121/1.4955010.

Korbiel T. et al. (2017), Recognition of the 24-hour noise exposure of a human, Archives of Acoustics, 42(4): 601–607, doi: 10.1515/aoa-2017-0064.

Large S., Stigwood D., Stigwood M. (2017), Cotton Farm Wind Farm long term community noise monitoring 4 years on: testing comliane and AM control methods, Inter Noise 2017, Hong Kong 27–30 August 2017. Cotton Farm Wind Farm long term community noise monitoring 4 years on: testing compliance and AM control methods, [In:] INTER-NOISE and NOISE-CON Congress and Conference Proceedings, Vol. 255, No. 3, pp. 4844–4854.

McCabe J.N. (2011), Detection and qualification on amplitude modulation in wind turbine noise, Fourth International Meeting on Wind Turbine Noise.

Paulraj T., Välisuo P. (2017), Effect of wind speed and wind direction on amplitude modulation of wind turbine noise, Inter Noise 2017, August 27–30, 2017, Honk Kong (CD).

Pleban D., Radosz J. (2015), Noise emitted by a wind turbine during operation [in Polish], Rynek Energii, 2015(3): 109–114.

Tashibana H., Yano H, Fukushima A. (2013), Assessment of wind turbine noise in immission areas, 5th International Conference on Wind Turbine Noise, Denver, August 28–30, 2013 (CD).

van den Berg G.P. (2004), Effects of the wind profile at night on the wind turbine sound, Journal of Sound and Vibration, 277(4–5): 955–970, doi: 10.1016/j.jsv.2003.09.050.

Wszołek T., Kłaczyński M. (2014), Problems in measurements of noise indicators for Wind Turbine in Poland, Forum Acusticum, Krakow, Poland.

Wszołek T., Kłaczyński M., Mleczko D. (2014a), Effect of acoustic model input parameters to the range of wind turbine noise, Proceedings of Forum Acusticum.

Wszołek T., Kłaczyński M., Mleczko D., Ozga A. (2014b), On certain problems concerning environmental impact assessment of wind turbines in scope of acoustic effects, Acta Physica Polonica A, 125(4A): A-38–A-44, doi: 10.12693/APhysPolA.125.A-38.




DOI: 10.24425/aoa.2020.132492

Copyright © Polish Academy of Sciences & Institute of Fundamental Technological Research (IPPT PAN)