Noise indicators for corona acoustic signal from power lines - estimation in intensified interference conditions

• Autorzy: Wszołek T.
• Języki publikacji: EN

Abstrakty

EN

In the spectrum of corona acoustic signal two characteristic components can be distinguished: (1) tonal components - higher harmonics of the network frequency and (2) noise component, observed in the frequency band extending above 1 kHz. On the other hand the total intensity of that signal is relatively low - up to 50dB at 15m distance from the outmost conductor - and it is strongly dependent on the environmental conditions. Thus the nature of that signal is essentially random. Because of the above-mentioned features, in practice the best evaluation method of the negative environmental impact is a continuous signal monitoring. Unfortunately for such a procedure some problems are encountered with automated extraction of the parameters (indicators) normally used for evaluation of the signal's acoustic annoyance, especially in intensified interference conditions. One of the more efficient methods of filtering out the random interference signals is the statistic spectrum measurement method. In this work a practical realization is described for estimation of corona noise indicators, making use of the statistic spectrum measurement. High efficiency of such an approach has been shown, especially in favorable weather conditions, when the acoustic signal of corona process is relatively low, while the random interference level may be intensified.

Słowa kluczowe

EN

corona acoustic signal; noise indicator; power lines; intensified interference

• Wydawca: Instytut Podstawowych Problemów Techniki PAN ; Komitet Akustyki PAN ; Polskie Towarzystwo Akustyczne
• Czasopismo: Archives of Acoustics
• Rocznik: 2009
• Tom: Vol. 34, No. 1
• Strony: 41--49
• Opis fizyczny: Bibliogr 9 poz., rys.

Twórcy

autor

Wszołek T.

• AGH University of Science and Technology, Department of Mechanics and Vibroacoustics, Al. Mickiewicza 30, 30-059 Kraków, Poland,

Bibliografia

• [1] Directive 2002/49/WE of the European Parliament and of the Council of 25 June 2002, relating to the assessment and management of environmental noise, Official Journal of the European Communities 18.7.2002.
• [2] Engel Z., Wszołek T., Audible Noise of Transmission Lines Caused by the Corona Effect: Analysis, Modelling, Prediction, Applied Acoustics, 47, 2, 149–163 (1996).
• [3] Kiyotomi Miyajima, Kazuo Tanabe, Evaluation of Audible Noise from Surface Processing Conductors for Overhead Transmission Line, Electrical Engineering in Japan, 159, 3, 19–25 (2007).
• [4] Rozporzadzenie Ministra Srodowiska z dnia 14 czerwca 2007 r. w sprawie dopuszczalnych poziomów hałasu w srodowisku, Dz.U. Nr 120, poz. 826.
• [5] Transmission Line Reference Book – 345 kV and Above, Second Edition, pp. 267–272, EPRI, Palo Alto, CA, 1982.
• [6] Ustawa Prawo ochrony srodowiska – Dz.U. 2001.62.627 z dnia 20 czerwca 2001.
• [7] Wszołek T., Uncertainty of LDEN Level Estimation for Corona Noise of UHV transmission Lines, International INCE Symposium “managing uncertainties in noise measurements and predictions: a new challenge for acousticians”, Le Mans 26–29 June 2005, on CD.
• [8] Wszołek T., Prognozowanie poziomu LDWN hałasu ulotu w liniach elektroenergetycznych WN, Przeglad Elektrotechniczny Konf., 1, 283–286 (2006).
• [9] Wszołek T., Uncertainty of LDEN calculation for corona noise from Ultra High Voltage power lines using reference methods, Archives of Acoustics, 31, 4 (Supplement), 303–310 (2006).