Reducing Power Losses in Corona Discharge under Rainfall Conditions

Тыныштыкбаев, К. Б.; Imanbaev, G. Zh.; Айнабаев, А.М.; Insepov, Zinetula

doi:10.1134/s1063785018060287

Cited by 5 publications

(8 citation statements)

References 1 publication

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“…And the power losses for CD increased by more than an order of magnitude at a scaled voltage of 120 kV corresponding to an average operating voltage of 290 kV, the power of corona losses on coated wires in rain conditions was reduced by approximately 40% compared to an uncoated wire. The power losses on the corona discharge in rain conditions are much lower for the A4 and A5 [10] coated samples than for the reference sample A0. The results of high-voltage breakdown tests of samples in the dry climate conditions are also show reduced losses ( Fig.…”

Section: Resultsmentioning

confidence: 81%

“…In this work, the samples of non-insulated (bare) industrial aluminium wires of AC300/39 [10] for 500 kV HVAC air transmission lines were used for the study. Here shown results for two types of electrolytes which were used for MAO.…”

Section: Mao Coatingmentioning

confidence: 99%

“…Proceedings of the SurfCoat Korea / Graphene Korea 2019 Joint International Conferences Seoul / Incheon -, Korea -March 27 -29, 2019 DOI: https://doi.org/10.26799/cp-surfcoat-graphene-korea-2019 EM images of wire surface samples: a) A0, b) A4, c) A5[10] …”

mentioning

confidence: 99%

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Development and fabrication of graphene oxide membranes for water desalination

Yelemessova¹

2019

SurfCoat Korea 2019 and Graphene Korea 2019 Joint Intl. Conferences Proceedings

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Mitigation of corona discharge is fundamental problem that was formulated by Lord Kelvin in 1911 but has not yet received a proper technical solution. On HVAC transmission lines up to 30% of the total electric power losses accounted for corona discharge (CD). A peak of losses occurs during adverse (wet) weather conditions, such as rain and snow. Coating on the surface of aluminium wire using microarc oxidation (MAO), also known as electrolytic plasma oxidation (EPO) was implemented to reduce losses due to CD. Samples covered by the surface with porous high-temperature α-Al2O3 aluminium oxide, silicon oxide SiO2, silicon carbide SiC reinforced with graphene oxide and carbon nanotubes. Industrial high-voltage testing shows that the significant reduction of the power loss due to corona of 30-50% has been measured in the present work where wires were coated with strong, adhesive, and super-hydrophilic layer. The corona ignition threshold voltage increased up to 40% in the rain conditions, and up to 15% for dry conditions. Simulations using finite element method (FEM) have shown a significant dependence of a local electric field enhancement factor on the surface wettability (hydrophilicity). Highly porous and hygroscopic properties of newly engineered surfaces allow to control contact angle of a water droplet on the wire and reduce the field enhancement factor in comparison with a uncoated surface via the effect of dielectric shielding.

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Section: Resultsmentioning

confidence: 81%

Section: Mao Coatingmentioning

confidence: 99%

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Development and fabrication of graphene oxide membranes for water desalination

Yelemessova¹

2019

SurfCoat Korea 2019 and Graphene Korea 2019 Joint Intl. Conferences Proceedings

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“…This paper demonstrates computer modelling results of experimental data for [8], for HV breakdown aluminium wires coated with thin film consisting of the alloys of high-temperature α-Al 2 O 3 alumina allow and various modifications of silicon oxide SiO 2 , silicon carbide SiC, reinforced with graphene oxide and carbon nanotubes. The extent scale of experimental conditions for CD ignition on HVAC in a dry and rain weather conditions were provided by a special climate chamber [13].…”

Section: Introductionmentioning

confidence: 84%

“…In this present work, aluminium wires were coated by the high-temperature alumina alloys α-Al 2 O 3 containing various modifications of silicon oxide SiO 2 and silicon carbide SiC, reinforced with graphene oxide (GO) and carbon nanotubes (CNT) were designed [7,8]. A compact ceramic coating using the MAO, also known as electrolytic plasma oxidation (EPO), is an attractive topic in the field of metal protection.…”

Section: Introductionmentioning

confidence: 99%

Highly effective anti-corona coatings on aluminium wires by surface modification

Zhakiyev

Tynyshtykbayev

Norem

et al. 2019

J. Phys. D: Appl. Phys.

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This work presents a detailed comparison of our computer simulation study with our own experiment on coatings of aluminium wires for high-voltage lines and characterization of coatings. Computer modelling, using finite element method (FEM), has shown a significant dependence of a local electric field enhancement factor (β-factor) on the surface hydrophilicity (wettability). Modelling explained that the β-factor from a micro-tip on a high-voltage line can be decreased with dependence from contact angles. It has been shown that highly porous and hygroscopic properties of the modified surface reduce the contact angle of water droplets on the wire and the β-factor from the rough surface due to the dielectric shielding. Newly engineered surfaces allow for control of the contact angle of a water droplet on the wire and also reduce the β-factor, in comparison with an uncoated surface.

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Laser nanoengineered coatings for efficient energy transportation through corona discharge suppression

Emelyanenko,

Boinovich

2024

Optics & Laser Technology

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Reducing Power Losses in Corona Discharge under Rainfall Conditions

Cited by 5 publications

References 1 publication

Development and fabrication of graphene oxide membranes for water desalination

Development and fabrication of graphene oxide membranes for water desalination

Highly effective anti-corona coatings on aluminium wires by surface modification

Laser nanoengineered coatings for efficient energy transportation through corona discharge suppression

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