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Model to estimate the trapping parameters of cross-linked polyethylene cable peelings of different service years and their relationships with dc breakdown strengths

Model to estimate the trapping parameters of cross-linked polyethylene cable peelings of different service years and their relationships with dc breakdown strengths
Model to estimate the trapping parameters of cross-linked polyethylene cable peelings of different service years and their relationships with dc breakdown strengths
In this study, an improved trapping/detrapping model was used to simulate the charge dynamics in cross-linked polyethylene peelings from different-year aged cables. Injection barrier of trapping parameters was estimated by the model fitted to experimental data for each type of sample. Moreover, dc breakdown tests were operated on those samples. It has been found that the dc breakdown strength of inner-layer samples is the lowest in cable sections with thicker insulation layer taken from high-voltage ac (HVAC) 220 kV service condition, whereas for the cable with thinner insulation from HVAC 110 kV, middle-layer samples have worst breakdown performance. This might be explained by the space charge issues under long-term HVAC condition. More importantly, a clear relationship between estimated model parameters, including injection barrier, trap depth and trap density, with the dc breakdown strength in each layer has been reported in this study.
2397-7264
95-105
Liu, Ning
f7db88b0-49eb-4cc4-9d98-c73be7da1784
Zhou, Churui
c790215c-c3e7-4398-bb05-c4f9fc27558f
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Xu, Yang
61510c27-6d1e-4d23-aded-65e5469bef1d
Cao, Junzheng
cf3a832d-7db0-48a0-a665-4b28ec9c138c
Wang, Haitian
7f867657-bb51-48a8-ad1a-98241c1d02b9
Liu, Ning
f7db88b0-49eb-4cc4-9d98-c73be7da1784
Zhou, Churui
c790215c-c3e7-4398-bb05-c4f9fc27558f
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Xu, Yang
61510c27-6d1e-4d23-aded-65e5469bef1d
Cao, Junzheng
cf3a832d-7db0-48a0-a665-4b28ec9c138c
Wang, Haitian
7f867657-bb51-48a8-ad1a-98241c1d02b9

Liu, Ning, Zhou, Churui, Chen, George, Xu, Yang, Cao, Junzheng and Wang, Haitian (2016) Model to estimate the trapping parameters of cross-linked polyethylene cable peelings of different service years and their relationships with dc breakdown strengths. High Voltage, 1 (2), 95-105. (doi:10.1049/hve.2016.0012).

Record type: Article

Abstract

In this study, an improved trapping/detrapping model was used to simulate the charge dynamics in cross-linked polyethylene peelings from different-year aged cables. Injection barrier of trapping parameters was estimated by the model fitted to experimental data for each type of sample. Moreover, dc breakdown tests were operated on those samples. It has been found that the dc breakdown strength of inner-layer samples is the lowest in cable sections with thicker insulation layer taken from high-voltage ac (HVAC) 220 kV service condition, whereas for the cable with thinner insulation from HVAC 110 kV, middle-layer samples have worst breakdown performance. This might be explained by the space charge issues under long-term HVAC condition. More importantly, a clear relationship between estimated model parameters, including injection barrier, trap depth and trap density, with the dc breakdown strength in each layer has been reported in this study.

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Accepted/In Press date: 9 June 2016
e-pub ahead of print date: 21 July 2016
Organisations: EEE

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Local EPrints ID: 402967
URI: http://eprints.soton.ac.uk/id/eprint/402967
ISSN: 2397-7264
PURE UUID: e728d7d9-3489-4343-b632-9744eecf7210

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Date deposited: 21 Nov 2016 11:43
Last modified: 06 Oct 2020 18:46

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