Origin and abatement of tonal emission from high voltage transmission lines

The origin of the locally unacceptable and intensive tonal 2f=100 Hz emission from overhead high voltage lines has been clearly traced by means of multiple diagnostics applied to a model line in the laboratory. Use of a special hydrophilic surface preparation has demonstrated a significant reduction of tonal acoustic noise emission after heavy rain.ZusammenfassungDer Ursprung von an manchen Orten unannehmbar empfundenen tonalen 2f=100 Hz Lärmemissionen von Hochspannungsleitungen wurde durch Anwendung vielfacher Diagnostikmethoden auf eine Modellanordnung im Labor eindeutig geklärt. Bei Anwendung einer speziellen hydrophilen Oberflächenbehandlung wurde eine beträchtliche Reduktion der akustischen Gesamtemission nach schwerem Regen nachgewiesen.

[1]  J. Latham,et al.  The instability of evaporating charged drops , 1967, Journal of Fluid Mechanics.

[2]  L. E. Zaffanella,et al.  Audible-Noise Reduction by Bundle Geometry Optimization , 1973 .

[3]  Geoffrey Ingram Taylor,et al.  Disintegration of water drops in an electric field , 1964, Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences.

[4]  R. H. Schlomann,et al.  Investigation of Corona Effects from Wet Bundle Conductions for Application to UHV Configurations , 1972 .

[5]  L. Rayleigh.  XX. On the equilibrium of liquid conducting masses charged with electricity , 1882 .

[6]  John Zeleny,et al.  Instability of Electrified Liquid Surfaces , 1917 .

[7]  G. Taylor,et al.  The bursting of soap-bubbles in a uniform electric field , 1925, Mathematical Proceedings of the Cambridge Philosophical Society.

[8]  G. Castle,et al.  The electric field at a conductive liquid surface stressed by an AC voltage , 1999, Conference Record of the 1999 IEEE Industry Applications Conference. Thirty-Forth IAS Annual Meeting (Cat. No.99CH36370).

[9]  M. Akazaki,et al.  Corona Phenomena from Water Drops on Smooth Conductors under High Direct Voltage , 1965 .

[10]  J. Hoburg,et al.  Current-driven, corona-terminated water jets as sources of charged droplets and audible noise , 1975, IEEE Transactions on Power Apparatus and Systems.

[11]  D. J. Bosack,et al.  Spectral Characteristics of Acoustic Noise from Metallic Protrusions and Water Droplets in High Electric Fields , 1974 .

[12]  E. R. Taylor,et al.  Audible noise and visual corona from HV and EHV transmission lines and substation conductors , 1969 .