Effects of multiple parameters on static electrification and breakdown strength of transformer oil

Liu, Daosheng; Du, B. X.; Liu, Feifei; Wang, Shihui

doi:10.1049/iet-smt.2015.0303

Cited by 9 publications

(1 citation statement)

References 21 publications

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“…Both alternating (AC) and constant (DC) fields significantly increase the phenomenon of streaming electrification. Besides, Liu et al [13] showed that under certain conditions, the electrification current can change the sign after translating an external constant electric field. Li et al [14] analyzed the influence of particle electrification on the AC-based measurement circuit.…”

Section: Introductionmentioning

confidence: 99%

Measurement of Dielectric Liquid Electrification in the Shuttle System with Two Parallel Electrodes

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2021

Energies

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In this paper, a device with swinging plate electrodes has been proposed to measure contact electrification of a liquid sample. The proposed structure is composed of two parallel metallic plates immersed in a dielectric liquid. One of the plates is swinging with a constant frequency in a range from 0.4 to 4 Hz. The paper investigates the dependence in time and frequency of electrode velocity and streaming electrification. The measured current occurs for a very low intermittent velocity of less than 10 mm/s. In this range, the electrification current is around 50 pA. For higher velocities of up to 150 mm/s, the current is at the level of 1200 pA. The time–frequency characteristic using short-time Fourier transform shows no temporal changes in the frequency spectrum. The dependence of electrification on shuttle speed was calculated and it can be approximated with a second order polynomial model with the determination coefficient higher than 0.9. The advantage of the sensor is the ability to measure electrification phenomena without the necessity of having rotating electrodes or having a large volume of flowing liquids.

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Section: Introductionmentioning

confidence: 99%