The Vibration Characteristics of Rain Droplet on the Surface of the Overhead Line Conductors

Li, Qi; Rowland, S. M.

doi:10.1109/cieec.2018.8745753

Cited by 4 publications

(2 citation statements)

References 23 publications

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“…The deformation and vibration modes of the water droplet depend on a number of factors. The factors include the magnitude of the applied field, the surface tension, droplet size (volume) and the water density of the water droplet [13,20,21]. Additionally, the actual insulator surface has a non-uniform electric field distribution.…”

Section: Creepage Phenomenon On the Insulator Surfacementioning

confidence: 99%

The Dynamic Behaviour of Multi-Phase Flow on a Polymeric Surface with Various Hydrophobicity and Electric Field Strength

Liu

et al. 2022

Polymers

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The dynamic behaviour of rain droplets on the insulator surface is a key measure to its reliability and performance. This is due to the fact that the presence and motion of rain droplets cause intensive discharge activities, such as corona and low current arcing, which accelerate the ageing process and flashovers. This article aims to investigate and characterize the movement of a rain droplet placed on an inclined insulator surface subject to an intensive electric field. The rain droplets’ movement on hydrophobic surfaces in the absence of an electric field is investigated. A high speed camera is used to capture the footage and finite element method (FEM) is used to simulate the multi-physics phenomenon on two polymeric surfaces, namely, silicon rubber (SiR) and PTFE (polytetrafluoroethylene). A ‘creepage’ motion was observed. The inception of motion and the movement speed are analysed in correlation with various surface conditions. Models are established to estimate the moisture and potential discharge characteristics on the inclined polymeric surfaces. They are further utilized to analyse the actual insulators subject to wet conditions.

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Section: Creepage Phenomenon On the Insulator Surfacementioning

confidence: 99%

The Dynamic Behaviour of Multi-Phase Flow on a Polymeric Surface with Various Hydrophobicity and Electric Field Strength

Liu

et al. 2022

Polymers

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“…The phase relationship between applied voltage and droplet vibration depends on the size of the droplet, and the size range of the droplet formed on the conductor surface is the main factor affecting the inception of a corona. Each raindrop has a fixed resonance frequency that makes its vibration amplitude reach its maximum, which is determined by its volume [13,14].…”

Section: Introductionmentioning

confidence: 99%

The Electric Field Evaluation for Vibrating Rain Droplets on the Overhead Line Conductors

Meng

et al. 2023

Energies

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The water droplets on the surface of the overhead line (OHL) conductors are subject to an intensive electric field, which induces electric force on the charged liquid surface. Under the combined action of the surface tension as well as the electric force, movement and deformation can be observed on those water droplets. These result in a re-distribution of charge density on the liquid surface and therefore a re-distribution of electric force. In this paper, in order to strengthen the understanding of this complex multi-physics problem of interaction and mutual coupling, the vibration characteristics of water droplets under alternating electric fields is studied using the finite element method (FEM). Parameters such as the volume size of the water droplet, static/dynamic contact angle between the water droplet and conductor surface and voltage level are studied in relation to the vibration characteristics. The reproducible correlation between the phase and amplitude of the water droplet vibration on the surface of the conductor and the applied voltage is established. According to the calculated instantaneous electric field strength, it is explained that protrusions such as water droplets are the starting point of corona discharge.

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The Dynamic Contact Angle of Water Droplets Subjected to AC Electric Fields

Rowland

et al. 2022

2022 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)

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The Vibration Characteristics of Rain Droplet on the Surface of the Overhead Line Conductors

Cited by 4 publications

References 23 publications

The Dynamic Behaviour of Multi-Phase Flow on a Polymeric Surface with Various Hydrophobicity and Electric Field Strength

The Dynamic Behaviour of Multi-Phase Flow on a Polymeric Surface with Various Hydrophobicity and Electric Field Strength

The Electric Field Evaluation for Vibrating Rain Droplets on the Overhead Line Conductors

The Dynamic Contact Angle of Water Droplets Subjected to AC Electric Fields

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