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Space charge polarization in insulating mineral oil

Space charge polarization in insulating mineral oil
Space charge polarization in insulating mineral oil
Dielectric spectroscopy is a powerful tool to study dipole relaxation, electrical conduction and structure of materials. Space charge polarization, as a parasitic effect due to the blocking of charge carriers in the vicinity of electrode, can mask dielectric response of the sample at low frequencies. In this paper, the frequency response of three different kinds of mineral oils have been measured and compared with the simulation based on a classic space charge polarization model. Since the creation of charge carriers in mineral oil is not only from dissociation but also injection from electrode, a modified model with injected part could describe the measurement result more accurately. The dielectric response due to electrode polarization has been simulated considering both the movement of internal charge carriers and injected charge carriers. According to the simulation results, the frequency-dependent curve of complex dielectric permittivity calculated from the polarization model could fit the experimental data well. The amount of the injected charge carriers increases with the aging time. A better fit can be obtained when high mobility charge carriers are taken into account. The present model of space charge polarization enables one to obtain a better understanding of electrical conduction in mineral oil
587-590
Zhou, Y.
a5398d19-1c29-40ca-9c74-72a1fa2db5e6
Hao, M.
fb7006e0-07c0-46f5-9279-e30a7d3bd614
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Wilson, Gordon
fd02d259-a5b6-44ce-be29-47073c552c5b
Jarman, Paul
f0133a9d-702e-489a-afc5-2950eeba10ab
Zhou, Y.
a5398d19-1c29-40ca-9c74-72a1fa2db5e6
Hao, M.
fb7006e0-07c0-46f5-9279-e30a7d3bd614
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Wilson, Gordon
fd02d259-a5b6-44ce-be29-47073c552c5b
Jarman, Paul
f0133a9d-702e-489a-afc5-2950eeba10ab

Zhou, Y., Hao, M., Chen, George, Wilson, Gordon and Jarman, Paul (2013) Space charge polarization in insulating mineral oil. 2013 IEEE Conference on Electrical Insulation and Dielectric Phenomena, China. 20 - 23 Oct 2013. pp. 587-590 . (doi:10.1109/CEIDP.2013.6748322).

Record type: Conference or Workshop Item (Poster)

Abstract

Dielectric spectroscopy is a powerful tool to study dipole relaxation, electrical conduction and structure of materials. Space charge polarization, as a parasitic effect due to the blocking of charge carriers in the vicinity of electrode, can mask dielectric response of the sample at low frequencies. In this paper, the frequency response of three different kinds of mineral oils have been measured and compared with the simulation based on a classic space charge polarization model. Since the creation of charge carriers in mineral oil is not only from dissociation but also injection from electrode, a modified model with injected part could describe the measurement result more accurately. The dielectric response due to electrode polarization has been simulated considering both the movement of internal charge carriers and injected charge carriers. According to the simulation results, the frequency-dependent curve of complex dielectric permittivity calculated from the polarization model could fit the experimental data well. The amount of the injected charge carriers increases with the aging time. A better fit can be obtained when high mobility charge carriers are taken into account. The present model of space charge polarization enables one to obtain a better understanding of electrical conduction in mineral oil

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Published date: October 2013
Venue - Dates: 2013 IEEE Conference on Electrical Insulation and Dielectric Phenomena, China, 2013-10-20 - 2013-10-23
Organisations: Faculty of Physical Sciences and Engineering

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Local EPrints ID: 364660
URI: http://eprints.soton.ac.uk/id/eprint/364660
PURE UUID: 0e682863-7c56-4191-985f-ab4a173ea91c

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Date deposited: 08 May 2014 10:48
Last modified: 19 Jul 2019 21:13

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Contributors

Author: Y. Zhou
Author: M. Hao
Author: George Chen
Author: Gordon Wilson
Author: Paul Jarman

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