Experimental verification of the potential of superhydrophobic surfaces in reducing audible noise on HVAC overhead line conductors

Zhang, Xu; Cotton, Ian; Li, Qi; Rowland, S. M.; Emersic, Christopher; Lian, Chengxing; Li, Wenyuan

doi:10.1049/hve2.12200

Cited by 11 publications

(18 citation statements)

References 44 publications

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“…Yi et al (2016) found that the DC corona inception voltage increases with the thickness of the RTV coating on the aluminum conductor steel reinforced (ACSR). Zhang et al (2019Zhang et al ( , 2022 applied a commercial superhydrophobic coating on ACSR, the SCA was 162.4 °. The application of the superhydrophobic coating greatly reduces the quantity of droplets on the ACSR and reduces the electric field distortion generated by the tip of the water droplet.…”

Section: Coatings Aim At Conductors Coronamentioning

confidence: 99%

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A review on mechanism and application of functional coatings for overhead transmission lines

et al. 2022

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Overhead transmission line is the main method of power transmission. Conductors, insulators, and towers are the primary electrical equipment of overhead transmission lines. Due to overhead transmission lines work in the natural environment, problems such as icing, corona discharge, contamination deposition, and corrosion will arise. As a result, some accidents may occur, which cause enormous economic losses. The above problems can be solved by coating functional coatings with superhydrophobic, semiconductive, anti-corrosion, and other characteristics on electrical equipment, which has the advantages of low cost and high efficiency. Therefore, functional coatings have become a research hotspot in the field of external insulation in recent years. In view of the various problems of different electrical equipment in overhead transmission lines, distinctive solutions need to be adopted, so this review classifies the coatings according to the usage scenarios and functions. In each category, first briefly outlines the causes of the electrical equipment problem, then introduces the mechanism of using this type of functional coating to solve the problem, next summarizes the development and application status of this type of coating, after summarizes the limitations of this coating, and finally provides a summary of the key issues in the research of functional coatings and gives an outlook on potential future research directions. This review intends to provide readers with a comprehensive overview of the performance principles and current application status of functional coatings for overhead transmission lines.

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Section: Coatings Aim At Conductors Coronamentioning

confidence: 99%

“…The images captured by the UV camera of (A) uncoated conductors, (B) coated conductors (Zhang et al, 2022). Measured noise levels (dB above background) as a function of electric field and frequency with continuous water spray on (C) uncoated conductors, (D) coated conductors (Zhang et al, 2022).…”

Section: Figurementioning

confidence: 99%

A review on mechanism and application of functional coatings for overhead transmission lines

et al. 2022

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“…As it is known, the protective coatings under development for overhead line wires can improve or deteriorate the bandwidth of high-frequency communication channels, as well as affect the electrical characteristics of the conductor. Therefore, we experimentally determined the change of the studied characteristics from the application method and the number of layers of oxide nanostructured coating [35][36][37].…”

Section: Investigation Of the Effect Of A Nanostructured Coating On A...mentioning

confidence: 99%

Oxide Nanostructured Coating for Power Lines with Anti-Icing Effect

et al. 2022

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This paper presents the results of the development of a technology to obtain a nanostructured coating for the protection of overhead wires and the possibility of their application in the electric power industry. The paper provides an analysis of available data on methods of combating ice in different countries, ways to protect the surface of metals from environmental influences, and new materials used for protection. We studied the possibility of using a protective nanostructured coating to protect overhead wires. A technology for obtaining a protective nanostructured coating based on silicon oxide and methods for applying it to the wire of overhead lines are proposed. The analysis of the elemental composition and surface morphology of overhead line wires with protective coating is carried out by scanning electron microscopy. The influence of the nanostructured coating on the high-frequency signal bandwidth and wire resistance using a PCIe-6351 data acquisition board, equipped with a BNC-2120 terminal module generating a frequency signal were determined using the National Instruments LabVIEW software package. The subject of the study was a 110 kV overhead power line with a protective coating developed in this work. By analyzing the calculation, we obtained the operating requirements of the developed nanostructured coating. As a result, we developed a protective coating satisfying the working conditions and investigated its properties. In the final phase of the experiment, we tested the electrical characteristics of overhead wires with the developed protective coating.

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“…Therefore, a semianechoic chamber in the high voltage lab of the University of Manchester was built to reduce baseline noise levels. A comparison of untreated conductors and conductors with a superhydrophobic coating under a continuous water spray and an AC voltage was then carried out and reported in our previous paper [18]. It was shown that the 2f hum noise and overall sound pressure levels can both be reduced with a superhydrophobic coating.…”

Section: Introductionmentioning

confidence: 98%

“…It was shown that the 2f hum noise and overall sound pressure levels can both be reduced with a superhydrophobic coating. A comparison of the droplet distributions gave some evidence for the cause of noise reduction [18].…”

Section: Introductionmentioning

confidence: 99%

Audible Noise and Corona Discharge From Water Droplets on Superhydrophobic HVAC Conductors

Zhang

Cotton

Rowland

et al. 2023

IEEE Trans. Power Delivery

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Audible noise from transmission lines is mainly generated by corona discharge from defects and water droplets on the conductors' surface. Applying a superhydrophobic coating to the conductors can reduce corona discharge, thereby reducing the level of audible noise produced. In this paper, corona discharge and noise measurements from an untreated conductor and a conductor coated with superhydrophobic coatings were carried out in AC electric fields and continuous water spray. The coated conductors show higher partial discharge inception voltages (PDIV) than uncoated ones. PD magnitude and PD per cycle of the coated conductors are lower compared with uncoated conductors, especially at electric fields above 14 kV/cm. A linear correlation between overall sound pressure and total PD magnitude is established. The behavior of corona discharges from single droplets with various sizes and positions and associated droplet vibration were investigated and the local electric field enhancement was analyzed by finite element analysis to examine the influence of droplet size and position on electric field distribution. Superhydrophobic coatings result in reduced PD magnitude and number and therefore reduce audible noise generated. This is attributed to small sessile droplets forming rather than large pendant droplets.

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Experimental verification of the potential of superhydrophobic surfaces in reducing audible noise on HVAC overhead line conductors

Cited by 11 publications

References 44 publications

A review on mechanism and application of functional coatings for overhead transmission lines

A review on mechanism and application of functional coatings for overhead transmission lines

Oxide Nanostructured Coating for Power Lines with Anti-Icing Effect

Audible Noise and Corona Discharge From Water Droplets on Superhydrophobic HVAC Conductors

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