Influence of voltage polarity on the corona performance of ice-covered conductor

Hu, Qin; He, Gaohui; Shu, Lichun; Jiang, Xingliang; Yang, Hang; Tan, Jinfeng

doi:10.1016/j.ijepes.2018.08.010

Cited by 12 publications

(4 citation statements)

References 19 publications

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“…E max of the icicles near the high‐voltage end increases with the increase of the icicle length. When the icicle length is 8 cm, E max near the high‐voltage end can reach 30 kV/cm, which will cause violent corona reaction and corona noise [24].…”

Section: Simulation and Calculation Resultsmentioning

confidence: 99%

Three‐dimensional electric field simulation and flashover path analysis of ice‐covered suspension insulators

et al. 2020

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Flashover of ice-covered insulators seriously affects the safe operation of transmission lines. It is necessary to study the electric field distribution for flashover analysis of ice-covered insulators. The electric field of ice-covered insulators was mostly calculated by a two-dimensional (2D) axisymmetric model that cannot be well corresponded to actual icing situations. In this study, a 3D electric field simulation model of ice-covered suspension insulators under moderate icing condition with applied DC voltage was established. Two characteristic parameters, E av and E max were proposed to measure electric field distortion degree. Based on the simulation results, the effects of water film conductivity, icicle length, icicle deviation angle, and icicle distribution on E av and E max were studied. The results showed that icicles have a significant influence on the electric field distribution of insulators. E av increases with the increase of icicle length and decreases with the increase of icicle deviation angle. E max increases with the increase of the icicle length, icicle spacing and adjacent icicle length difference. When the icicle deviation angle is 45°, E max is the largest. Lastly, the possible flashover paths were analysed based on the simulation results, which would provide a theoretical basis for building a flashover model of ice-covered insulators.

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Section: Simulation and Calculation Resultsmentioning

confidence: 99%

Three‐dimensional electric field simulation and flashover path analysis of ice‐covered suspension insulators

et al. 2020

Self Cite

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“…The occurrence and accumulation of ice layers present a considerable risk of substantial harm to equipment, such as power lines, [ 1 ] aircraft engines, [ 2 ] and wind turbine systems, [ 3 ] even endangering human life and property safety. De‐icing systems are presently classified into two categories (i.e., active de‐icing and passive anti‐icing categories), depending on their action mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Functionalized Superhydrophobic Coatings with Electro‐Photothermal Effect for All‐Day Durable Anti‐Icing

Deng,

Du,

Chen

et al. 2024

Adv Materials Inter

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Superhydrophobic surfaces offer notable advantages, including markedly low water affinity and reduced ice adhesion strength. Nevertheless, their practical utility is impeded by their limited durability and vulnerability to failure in cold and humid environments. In this study, a novel approach for devising an electro‐photothermal superhydrophobic (EPS) nanocomposite coating is presented. The findings indicate that the EPS nanocomposite coating exhibits both physical and chemical self‐cleaning attributes, showcasing a synergistic interplay of superhydrophobicity, electrothermal, and photothermal characteristics. The superhydrophobic coating delays icing about four times longer than the original coating. At ambient temperatures of −20 °C, the coating stacked with an electro‐ and photo‐thermal performance de‐icing layer reduces the de‐icing time by about 5 times more than the purely photo‐thermal performance de‐icing time, and reduces the de‐icing time by about 4 times more than the purely electro‐thermal de‐icing time. Furthermore, the EPS surface demonstrates the capability to sustain temperatures above 0 °C through the photothermal effect on sunny days, utilizing both the electrothermal and photothermal effects on cloudy days, and relying on the electrothermal effect during cold nights. The research introduces a novel method for fabricating functional materials, pertinent to practical anti‐icing and de‐icing applications.

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“…The air near the wires will be repeatedly ionized under the action of the electric field to generate sound, light, and heat [9][10][11]. The above phenomenon not only results in noise pollution into the living environment of the nearby residents, causing misgivings about personal safety, but also leads to power loss [12][13][14][15][16]. Therefore, it is important to suppress the corona discharge of high-voltage transmission lines.…”

Section: Introductionmentioning

confidence: 99%

Superhydrophobic and Thermally Conductive Coating for Restraining Corona Loss and Audible Noise of High-Voltage Transmission Lines

Li,

Xu,

Wang

et al. 2023

Coatings

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In recent years, the number of high-voltage transmission lines has sharply increased with the rapid development of modern industry. However, a corona discharge phenomenon often occurs on the exposed high-voltage transmission lines, leading to energy loss and noise pollution. Herein, we have proposed a facile spraying method to prepare a superhydrophobic and thermally conductive coating to restrain the corona discharge phenomenon of high-voltage transmission lines, with vinyl silicone oil and hydrogen silicone oil as the main materials and modified boron nitride (BN) as a thermal conductive filler. The obtained composite coating exhibited superhydrophobicity, with a high water contact angle of 162°. In addition, the coating also showed a good self-cleaning capability, non-adhesion capability, mechanical stability, and chemical stability. Owing to the construction of the thermally conductive pathways with BN, the thermal conductivity of the coating reached 1.05 W/m·K, which was beneficial to quickly dissipating the heat generated by the current heating effect. Moreover, the corona losses of the positive and negative electrodes under simulated rainy conditions were decreased by 7.43% and 8.05%, respectively. The findings of our work have provided a new strategy to effectively restrain the corona discharge phenomenon of transmission lines, showing great application potential in the field of high-voltage power networks.

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Influence of voltage polarity on the corona performance of ice-covered conductor

Cited by 12 publications

References 19 publications

Three‐dimensional electric field simulation and flashover path analysis of ice‐covered suspension insulators

Three‐dimensional electric field simulation and flashover path analysis of ice‐covered suspension insulators

Functionalized Superhydrophobic Coatings with Electro‐Photothermal Effect for All‐Day Durable Anti‐Icing

Superhydrophobic and Thermally Conductive Coating for Restraining Corona Loss and Audible Noise of High-Voltage Transmission Lines

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