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Space charge characteristics of LDPE nanocomposite/LDPE insulation system

Space charge characteristics of LDPE nanocomposite/LDPE insulation system
Space charge characteristics of LDPE nanocomposite/LDPE insulation system
Two kinds of insulation systems with nanocomposite have been fabricated by co-pressing low-density polyethylene (LDPE) and nano-titania doped LDPE (TiO2-LDPE) films. The
three-layer systems considered are TiO2-LDPE/LDPE/TiO2-LDPE (namely, NLN) and LDPE/TiO2-LDPE/LDPE (namely, LNL). Space charge distributions under different applied electric fields were measured by the pulsed electro acoustic (PEA) method. The charge transport characteristics and the interface space charge formation as well as the
effect of nano-TiO2 concentration have been systematically discussed. The results show that heterocharges and homocharges are formed at the LDPE/TiO2-LDPE polymer
interfaces in the system NLN and LNL, respectively. The nature of the interfacial charge has been explained in term of the interfacial polarization theory combined with
conductivity and permittivity of the materials. Additionally, the recombination between charges influences the amount of the interface space charge. However, the NLN system always stores more charges than LNL, which was explained by the change of the effective electric field caused by the formation of the interface space charges. The results obtained would provide experimental support for optimizing high voltage direct current power cables.
LDPE, nano-TiO2, PEA, space charge characteristics, polymer interface
92-100
Li, Shengtao
e2d199c9-1c0c-40c8-aefb-ff3b3d8e4799
Zhao, Ni
adb2ee28-77bd-4c36-999f-2b136c382a06
Nie, Yongjie
a93f688f-85bf-4d76-a928-2e36f9f2b4b6
Wang, Xia
05442af1-b96d-4271-8b58-b8515946656a
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Teyssedre, Gilbert
22454a9c-5caf-4e66-9516-89eb03136127
Li, Shengtao
e2d199c9-1c0c-40c8-aefb-ff3b3d8e4799
Zhao, Ni
adb2ee28-77bd-4c36-999f-2b136c382a06
Nie, Yongjie
a93f688f-85bf-4d76-a928-2e36f9f2b4b6
Wang, Xia
05442af1-b96d-4271-8b58-b8515946656a
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Teyssedre, Gilbert
22454a9c-5caf-4e66-9516-89eb03136127

Li, Shengtao, Zhao, Ni, Nie, Yongjie, Wang, Xia, Chen, George and Teyssedre, Gilbert (2015) Space charge characteristics of LDPE nanocomposite/LDPE insulation system. IEEE Transactions on Dielectrics & Electrical Insulation, 22 (1), 92-100. (doi:10.1109/TDEI.2014.004524).

Record type: Article

Abstract

Two kinds of insulation systems with nanocomposite have been fabricated by co-pressing low-density polyethylene (LDPE) and nano-titania doped LDPE (TiO2-LDPE) films. The
three-layer systems considered are TiO2-LDPE/LDPE/TiO2-LDPE (namely, NLN) and LDPE/TiO2-LDPE/LDPE (namely, LNL). Space charge distributions under different applied electric fields were measured by the pulsed electro acoustic (PEA) method. The charge transport characteristics and the interface space charge formation as well as the
effect of nano-TiO2 concentration have been systematically discussed. The results show that heterocharges and homocharges are formed at the LDPE/TiO2-LDPE polymer
interfaces in the system NLN and LNL, respectively. The nature of the interfacial charge has been explained in term of the interfacial polarization theory combined with
conductivity and permittivity of the materials. Additionally, the recombination between charges influences the amount of the interface space charge. However, the NLN system always stores more charges than LNL, which was explained by the change of the effective electric field caused by the formation of the interface space charges. The results obtained would provide experimental support for optimizing high voltage direct current power cables.

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Accepted/In Press date: 8 September 2014
Published date: February 2015
Keywords: LDPE, nano-TiO2, PEA, space charge characteristics, polymer interface
Organisations: EEE

Identifiers

Local EPrints ID: 380101
URI: http://eprints.soton.ac.uk/id/eprint/380101
PURE UUID: 24338b9e-5c75-433e-9560-cdf95aa5dca9

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Date deposited: 07 Sep 2015 09:45
Last modified: 16 Dec 2019 20:15

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