Journal of South China University of Technology(Natural Science) >

2016 , Vol. 44 >Issue 8: 53 - 59

DOI: https://doi.org/10.3969/j.issn.1000-565X.2016.08.009

Power & Electrical Engineering

Influence of Aging Condition of XLPE Cable on Microstructure of Insulating Layer

Expand
  • 1.School of Electric Power//Guangdong Key Laboratory of Clean Energy Technology,South China University of Technology,Guangzhou 510640,Guangdong,China; 2.Transmission Department,Guangzhou Power Supply Bureau Co.,Ltd.,Guangzhou 510310,Guangdong,China
刘刚( 1969-) ，男，博士，副教授，主要从事智能高压电网、过电压及其防护、电力设备外绝缘研究．

Received date: 2015-11-12

  Revised date: 2016-04-13

  Online published: 2016-07-04

Supported by

Supported by the National High-tech R&D Program of China ( 863 program) ( 2015AA050201) ， the National Natural Science Foundation of China ( 51477054 ) and the Science and Technology Planning Project of Guangdong Province ( 2013B010405002)

Fold

Abstract

By testing two retired 110 kV XLPE cables and a spare cable,the influence of the aging condition of XLPE cables on the microstructure of insulating layers is revealed by means of PEA ( Pulsed Electro-Acoustic Method) and XRD.The results show that ( 1) the aging of the cables causes the size and crystallinity of insulation crystal to decrease,thus increasing the ability of the crystal to capture the space charges; ( 2) the aging process begins in the outermost layer of the cables,and a lasting aging has a greater influence on the intermediate insulating layer; ( 3) therefore,the intermediate layer may be the weak link where the breakdown occurs easily; and ( 4) due to the aging of XLPE cables,the microstructure characteristic changes from“high in the middle and low in both ends”to "homogenization”.

Key words： 110 kV XLPE cable; pulsed electro-acoustic method; X-ray diffraction; crystal; space charge

Cite this article

LIU Gang WU Liang JIN Shang-er HUANG Jia-sheng . Influence of Aging Condition of XLPE Cable on Microstructure of Insulating Layer[J]. Journal of South China University of Technology(Natural Science), 2016 , 44(8) : 53 -59 . DOI: 10.3969/j.issn.1000-565X.2016.08.009

Options
Outlines

/

〈 〉