Origin and abatement of tonal emission from high voltage transmission lines

Teich, T.H.; Weber, Herman

doi:10.1007/bf03161466

Cited by 11 publications

(12 citation statements)

References 12 publications

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“…Disturbance after the construction of power lines can be minimized by prohibiting hunting, vehicles and pets along them (Bergerud et al, 1984;Miller et al, 2001;Clair and Forrest, 2009). Power line corona noise, flashes and magnetic fields can be reduced through engineering solutions (Teich and Weber, 2002;Conti et al, 2003;Kalhor and Zunoubi, 2005;Semmler et al, 2005).…”

Section: Implications For Power Line Routingmentioning

confidence: 99%

The effects of power lines on ungulates and implications for power line routing and rights-of-way management

Bartzke¹,

May²,

Bevanger³

et al. 2014

Int. J. Biodivers. Conserv.

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Thousands of kilometres of power lines exist and more are planned. Ungulates that range over large areas are likely to encounter power lines, but a synthesis of power line effects on ungulates is lacking. Reindeer (Rangifer tarandus tarandus) are suspected to avoid power lines up to distances of 4 km. In contrast, some forest ungulates preferentially forage in power line rights-of-way, cleared areas under power lines. We reviewed the factors that possibly influence avoidance and attraction effects of power lines on ungulates, construct a conceptual framework, and make suggestions on how to mitigate avoidance effects through power line routing and rights-of-way management. Power line construction, noise and electromagnetic fields are possible sources of disturbance, while rights-of-way management influences habitat use under power lines. Disturbance and altered habitat use can induce barrier and corridor effects, thereby influencing connectivity. Species-specific effects influence behavioural disturbance and habitat use. We found little evidence for behavioural disturbance of reindeer or forest ungulates under power lines. Forest ungulates could benefit from browsing in power line rights-of-way if they are managed to provide abundant and preferred forage as well as sufficient cover. However, power lines may facilitate access for hunters and predators. As a precaution, construction of power lines should be avoided in calving areas. To establish a causal relationship between the construction of power lines and potential avoidance, before-after-impact-control studies are recommended. More research is needed to make recommendations for the optimal design of power line networks.

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Section: Implications For Power Line Routingmentioning

confidence: 99%

The effects of power lines on ungulates and implications for power line routing and rights-of-way management

Bartzke¹,

May²,

Bevanger³

et al. 2014

Int. J. Biodivers. Conserv.

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“…Teich and Weber considered AC droplet vibration phenomena on transmission line conductors [31]. However due to the limited imaging technology, most of the work in this area assumes that the vibration of droplets under AC field has little impact on the inception of corona discharge [32,33].…”

Section: Literature Reviewmentioning

confidence: 99%

The Impact of Water Droplet Vibration on Corona Inception on Conductors Under 50 Hz AC Fields

Rowland

Dupere

et al. 2018

IEEE Trans. Power Delivery

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Abstract--The relationship between the size of water droplets on the surface of AC high voltage conductors, their vibration and corona onset is investigated. Measurements have been carried out on individual droplets in high voltage experiments, including high speed photography, and discharge inception measurements. These have been correlated with acoustic emission from larger arrays of droplets on overhead transmission line conductors. A numerical model based on the finite element method has also been developed to simulate the vibration of the droplet enabling evaluation of the electric field and the characteristics of the droplet vibration. It is shown that the size of water droplet is critical in its mechanical response to the field and that corona does not necessarily occur when the droplet is deformed into its most conical state as is the case under DC fields. For larger droplets the phase shift between field and droplet vibration results in the maximum field occurring when the droplet is in a 'flattened' profile rather than when it is 'pointed'. The phase relationship between the droplet vibration and the electric field thus controls the onset of corona. It is argued that conductors which facilitate the development of small, uniform, stable droplets on their surface are the cause of abnormally high levels of low-frequency audible noise sometimes observed by transmission utilities. Moreover the narrow resonant response of the droplet may lead to a difference in acoustic emissions experienced between power utilities with 50 Hz and 60 Hz system frequencies.

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“…This adds a complication to the stability of the liquid interface. Teich and Weber [7] carried out early studies on vibrating droplet on the surface of overhead line conductors. Their experiment was designed by to examine the oscillation of pendant water droplets under a 100 kV AC supply voltage.…”

Section: Literature Reviewmentioning

confidence: 99%

“…However the work is only focused on pendent droplets on a very hydrophilic conductor. Dynamic behaviour was also evaluated on the water stream from the bottom of conductors [7][8]. As a result of the development of composite insulators, considerably more work has been published on water droplet behaviour on insulation surfaces [10][11][12][13][14][15][16][17][18][19].…”

Section: Literature Reviewmentioning

confidence: 99%

Wet conductor surfaces and the onset of corona discharges

Rowland

2015

2015 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)

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Origin and abatement of tonal emission from high voltage transmission lines

Cited by 11 publications

References 12 publications

The effects of power lines on ungulates and implications for power line routing and rights-of-way management

The effects of power lines on ungulates and implications for power line routing and rights-of-way management

The Impact of Water Droplet Vibration on Corona Inception on Conductors Under 50 Hz AC Fields

Wet conductor surfaces and the onset of corona discharges

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