Measurement of Audible Noise from Transmission Lines

Force, Task

doi:10.1109/tpas.1981.316619

Cited by 13 publications

(3 citation statements)

References 6 publications

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“…The scope of this work will be the analysis of the audio files of the effluvia in the strings of insulators at 220 kV in the coastal zone of Peru, the lines analyzed being L-2212 and L-2110. As for the tests, they will be analyzed under real operating conditions measurements taken directly in operation, so they work with real wind and environment noises [29].…”

Section: A Scopementioning

confidence: 99%

Corona Effect Measurement in High Voltage Lines with Innovation Projects

Padilla¹

2022

Preprint

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The investigation consists of taking data from the insulator chains of the 220 kV voltage for lines located in the coastal areas of Peru, in this case line 2212 from Huacho to Zapallal was chosen and the data consists of audios and images taken in hours at night when there is low temperature and high relative humidity, with the objective of identifying the characteristics that show the occurrence of effluvia that are atmospheric discharges due to the voltage of the line and the environmental conditions, this phenomenon is known as the Corona effect. Data were taken during the months of October 2020 June and July 2022, being more than 20 thousand archives of video, audio, and data (collected in csv type files), allowing to determine that the Corona effect does not manifest itself during the moments of lowest temperature. This allows redefining the maintenance strategy to be more effective in combating the damage to the insulators.

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Section: A Scopementioning

confidence: 99%

Corona Effect Measurement in High Voltage Lines with Innovation Projects

Padilla¹

2022

Preprint

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“…The scant literature [17][18][19][20][21][22][23] suggesting mechanisms of this 2f -emission is either vague or controversial. The references [21][22][23] in passing present an idea of the mechanism of the 2f -emission whereby the transfer of momentum of the ions around the conductor is said to be responsible for this emission. This idea intrinsically supports the connection of the emission to corona discharges.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, oscillating drops acting as acoustic membranes or the modulation of pulses forming a harmonic contribution at the frequency in question may be excluded as relevant sources of the 2f -emission. But as corona seems to be linked to the 2f -emission and as the ionization itself responsible for the crackling noise is not the source of the tonal component, the focus in this work is directed on the effects of the ions after the ionization took place, thus following the idea of [21][22][23]. Due to collisions with gas molecules, the drifting ions cause in the sum a rise of heat h in and a force f applying on the neutral gas.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of the tonal emission from ac high voltage overhead transmission lines

Straumann¹

2011

J. Phys. D: Appl. Phys.

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Foul weather conditions can lead to corona discharges on high voltage overhead transmission lines which are perceivable as an audible broadband crackling and hissing noise. In such situations this noise is often accompanied by a humming noise at twice the mains frequency (2f). While the crackling and hissing noise component was widely investigated in the past, the 2f-component went largely uncommented. Only a scant amount of literature suggests mechanisms explaining the occurrence of this emission, but these suggestions are either vague or controversial. In this paper a mechanism analogous to that of ion loudspeakers is presented, which describes the sound levels of audible 2f-emissions from high voltage model lines quantitatively in a satisfactory manner. While the broadband component of corona noise emissions has its immediate origin in the discharges themselves, the 2f-emissions arise from the drift of ions left behind by the discharges. Due to collisions with gas molecules, these ions cause in the sum a rise of heat in and a force applying on the neutral gas, thus producing the 2f-emissions. Depending on the situation, both can give rise to contributions of similar magnitude.

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