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Quantitative study of electric conduction in mineral oil by time domain and frequency domain measurement

Quantitative study of electric conduction in mineral oil by time domain and frequency domain measurement
Quantitative study of electric conduction in mineral oil by time domain and frequency domain measurement
Polarization and depolarization current measurement is a non-destructive testing method to study the dielectric properties of insulating materials. Two types of mineral oils with different aging times have been studied using both time domain and frequency domain methods separately. In this paper, a novel approach to understanding the correlation between the electric conduction in time domain and frequency domain has been proposed. When the charge carriers drift to the electrodes, they may be blocked and accumulated near the electrode. The amount of charge in the vicinity of electrode has been estimated. In the depolarization period, these charge layers will return to the bulk resulting in a depolarization current. In this paper, an analytical solution to the time dependence of the depolarization current has been developed and used to fit the experimental results. The field and temperature dependence of the polarization and depolarization current have been used to study the characteristics of charge carriers in mineral oil. The calculated conductivity has been used to simulate the frequency response in mineral oil and the simulating results have been compared with the experimental data.
current, conductivity, mineral oil, electric field, diffusion
2601-2610
Zhou, Yuan
32114695-f994-4f18-8393-779171c5a913
Hao, Miao
1ca8b57a-b1a6-40f9-8308-b8dfdfb8aead
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Gordon, Wilson
97fd1b49-2fa4-49be-9691-51c08fee9e02
Jarman, Paul
f0133a9d-702e-489a-afc5-2950eeba10ab
Zhou, Yuan
32114695-f994-4f18-8393-779171c5a913
Hao, Miao
1ca8b57a-b1a6-40f9-8308-b8dfdfb8aead
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Gordon, Wilson
97fd1b49-2fa4-49be-9691-51c08fee9e02
Jarman, Paul
f0133a9d-702e-489a-afc5-2950eeba10ab

Zhou, Yuan, Hao, Miao, Chen, George, Gordon, Wilson and Jarman, Paul (2015) Quantitative study of electric conduction in mineral oil by time domain and frequency domain measurement. IEEE Transactions on Dielectrics & Electrical Insulation, 22 (5), 2601-2610. (doi:10.1109/TDEI.2015.005062).

Record type: Article

Abstract

Polarization and depolarization current measurement is a non-destructive testing method to study the dielectric properties of insulating materials. Two types of mineral oils with different aging times have been studied using both time domain and frequency domain methods separately. In this paper, a novel approach to understanding the correlation between the electric conduction in time domain and frequency domain has been proposed. When the charge carriers drift to the electrodes, they may be blocked and accumulated near the electrode. The amount of charge in the vicinity of electrode has been estimated. In the depolarization period, these charge layers will return to the bulk resulting in a depolarization current. In this paper, an analytical solution to the time dependence of the depolarization current has been developed and used to fit the experimental results. The field and temperature dependence of the polarization and depolarization current have been used to study the characteristics of charge carriers in mineral oil. The calculated conductivity has been used to simulate the frequency response in mineral oil and the simulating results have been compared with the experimental data.

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Published date: 15 October 2015
Keywords: current, conductivity, mineral oil, electric field, diffusion
Organisations: EEE

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Local EPrints ID: 383890
URI: http://eprints.soton.ac.uk/id/eprint/383890
PURE UUID: ea4e8866-c811-4d51-a802-d32a84a2b3c0

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Date deposited: 30 Nov 2015 13:27
Last modified: 09 Sep 2019 18:35

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Contributors

Author: Yuan Zhou
Author: Miao Hao
Author: George Chen
Author: Wilson Gordon
Author: Paul Jarman

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