Numerical Analysis of the Induced Corona Vibrations on High-Voltage Transmission Lines Affected by Rainfall

Brahami, Mostéfa; Gourbi, A.; Tilmatine, Amar; Dăscălescu, Lucian

doi:10.1109/tpwrd.2010.2093606

Cited by 17 publications

(13 citation statements)

References 10 publications

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“…A further classic experiment by Taylor quantified the maximum vertex angles developed before a liquid surface becomes unstable (resulting in ejection of small jets of fluid) [14]. Being inspired by Taylor's cone, a number of researchers conducted further investigations on this electro-hydrostatic phenomenon [15][16][17][18][19][20][21][22][23].…”

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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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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“…This in turn results in the increase of the costs of other system components including insulators, cables, accessories, and support structures. Another issue connected to energy losses during operation of power transmission lines, especially under extreme conditions at high humidity and temperature, is generation of corona discharges in the vicinity of power line [3][4][5][6]. There exist various methods for detection and localization of corona discharges [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Comparative Analysis of Optical Signals Emitted by Corona on a Laboratory Model of Transmission Lines Made of Various Materials

Krzewiński

Frącz

Urbaniec

et al. 2017

Journal of Spectroscopy

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The paper presents results of comparative analyses of optical signals generated by corona discharges occurring in the vicinity and on the surface of power transmission lines made of five different materials under laboratory conditions. Three aluminium-based materials were chosen: pure aluminium, aluminium with added magnesium, and aluminium with added silicon, and for comparison purposes also, steel-based lines were considered: copper-coated steel and steel with added chromium and nickel. A three-phase triangular arrangement system operating under maximal voltage equal to 110 kV was applied for experimental tests. The optical radiation was registered using a spectrophotometer. During research works, also the influence of corona generation voltage and distance between power lines was investigated. Based on the achieved results, it was stated that the highest corona intensity was found for aluminium-based lines, for both pure aluminium and aluminium with added magnesium and silicon. The lowest corona intensity was observed for chromium- and nickel-alloyed (stainless) steel.

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“…Recent studies find that, besides icing galloping, large-amplitude oscillations may occur in the bundled conductors under the certain rainwind conditions, and the mechanism is still unknown. The effects of this phenomenon resulted in fatigue fractures of conductors, fatigue failures of spacers, and insulators, which threaten the safety operation and serviceability of the UHV transmission lines [1,2].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Mechanism of Rain-Wind Induced Vibration of Bundled Conductors

Zhou

Liu

2016

Shock and Vibration

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Under the certain rain-wind conditions, bundled conductors exhibit a rain-wind induced large-amplitude vibration. This type of vibration can cause the fatigue fractures of conductors and fatigue failures of spacers, which threaten the safety operation and serviceability of high-voltage transmission line. To reveal the mechanism of rain-wind induced vibration of bundled conductors, a series of 2-dimensional CFD models about the twin bundled conductors with rivulets are developed to obtain the curves of aerodynamic coefficients with the upper rivulet angle. The influences of the forward conductor’s aerodynamic shielding and the upper rivulet’s aerodynamic characteristics on the leeward conductor are discussed. Furthermore, a 2-dimensional 3DOF model for the rain-wind induced vibration of the leeward conductor is established. The model is solved by finite element method and Newmark method, and the effects of the wind velocity and the upper rivulet’s motion on vibration amplitude of the leeward conductor are analyzed. By contrast with the wake-induced vibration, it can easily find that the characteristics of rain-wind vibration are obviously different from those of the wake-induced vibration, and the main reason of the rain-induced vibration may be due to the upper rivulet’s motion.

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Numerical Analysis of the Induced Corona Vibrations on High-Voltage Transmission Lines Affected by Rainfall

Cited by 17 publications

References 10 publications

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

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

Comparative Analysis of Optical Signals Emitted by Corona on a Laboratory Model of Transmission Lines Made of Various Materials

Modeling and Mechanism of Rain-Wind Induced Vibration of Bundled Conductors

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