Diagnostic Symptoms of Corona Audible Noise in Continuous Monitoring Systems

• Autorzy: Wszołek T.
• Języki publikacji: EN

Abstrakty

EN

Random nature of corona processes in UHV power lines and the accompanying noise is the reason that in practice the best determination of acoustic parameters, necessary for the noise evaluation, is obtained from the continuous monitoring procedure. However because of considerable fluctuations (both the useful signal part and the interfering components), careful selection of monitored parameters is necessary to enable a possibility of automatic determination of the parameters that are required for long-term evaluation of corona noise. In the present work a practical realization is shown for estimation of corona noise parameters, based on the data obtained from continuous monitoring stations, making use of the statistical spectra measurement and characteristic features of corona process acoustic signal. Selected results are presented from continuous monitoring of corona noise generated at a 400 kV power line, with special attention focused on definitions of the measured quantities, which enable automatic estimation of the basic factors required for noise evaluation. Accompanying monitoring of environmental conditions, including humidity, precipitation intensity and fog density, that are well correlated with the corona process intensity, which might definitely increase the filtration efficiency of environmental disturbances and on the other hand, it enables verification of calculation methods applied to corona noise. The paper also contains a description of practical approach to selection signal parameters of corona noise in continuous monitoring stations.

Słowa kluczowe

EN

corona audible noise; power lines; continuous monitoring systems; noise indicators; statistical levels

• Wydawca: Instytut Podstawowych Problemów Techniki PAN ; Komitet Akustyki PAN ; Polskie Towarzystwo Akustyczne
• Czasopismo: Archives of Acoustics
• Rocznik: 2011
• Tom: Vol. 36, No. 1
• Strony: 151--160
• Opis fizyczny: Bibliogr. 11 poz., fot., tab., wykr.

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 (2002), Official Journal of the European Communities., L189:12-25.
• 2. Engel Z., Wszołek T. (1996), Audible Noise of Transmission Lines Caused by the Corona Effect: Analysis, Modeling, Prediction, Applied Acoustics, 47, 2, 149-163.
• 3. Environmental Law Act (2001), [in Polish: - Dz.U.2001.62.627 from 20.06.2001].
• 4. Hardie S., Wood A., Bodger P. (2008), An investigation of excessive corona on a new 275 kV line, EEA Conference&Exhibition 2008, Christchurch, New Zealand [CD].
• 5. Tanabe K. (1991), Second Harmonics of Audible Noise from AC Transmission Lines Random Walk Model of Space Distribution, IEEE Transactions on Power Delivery, 6, 4, 1991.
• 6. Transmission Line Reference Book - 345 kV and Above (1982), Second Edition, EPRI, Palo Alto, CA, pp. 267-272.
• 7. Wszołek T. (2008), Preconditions of continuous monitoring of the acoustic signal from corona in high-voltage power lines [in Polish], Electrical Review, Przeglad Elektrotechniczny, 10, 222-225.
• 8. Wszołek T. (2009), Noise Indicators for Corona Acoustic Signal from Power Lines - Estimation in Intensified Interference Conditions, Archives of Acoustics, 34, 1, 41-49.
• 9. Wszołek T. (2010), Uncertainty Analysis for Corona Audible Noise Long-term Rate Level Estimation in Continuous Monitoring Systems in Vicinity of Overhead AC Power Lines, Internoise 2010, Lisbone Portugal, 13-16 June 2010 [CD].
• 10. Wszołek T., Tadeusiewicz R. (2005), Extraction of the vector of distinctive features for the diagnostic process of the technical condition of UHV transmission lines, Archives of Acoustics, 30, 4, Supplement, 237-240.
• 11. Wszołek T., Tadeusiewicz R. (2006), Application of the corona acoustic signal in the diagnosis of the UHV power lines technical condition, ICSV13 Vienna, July 2-6, [CD].