NDLI: Transformation mechanism of electrical tree to water tree in XLPE cables

Content Provider	IEEE Xplore Digital Library
Author	Ming Huang Kai Zhou Wenbiao Tao Mingliang Yang Di Yang
Copyright Year	2014
Description	Author affiliation: Sch. of Electr. Eng. & Inf., Sichuan Univ., Chengdu, China (Ming Huang; Kai Zhou; Wenbiao Tao; Mingliang Yang; Di Yang)
Abstract	In this paper, the experimental phenomenon of transformation of electrical tree to water tree in XLPE cables is reported, the conditions and mechanism of the transformation are discussed. Electrical treeing aging experiment was used to obtain electrical trees in short XLPE cable samples, and water treeing accelerating aging experiment was performed after that, then the transformation phenomenon was discovered in samples by microscopic observation, based on the finite element simulation, and the transformation characteristics were analyzed. The study finds that electrical trees can be initiated in micro defects under the action of over-voltage in XLPE cables, because of the reduction of the electric field strength of the electrical tree tips, and along with moisture invasion, electrical trees become the beginning of water trees to grow; but the growth of water trees weaken the electric field distortion to some extent, and the development of electrical trees is inhibited; When the cables are subjected to over-voltage again, an electrical tree may be initiated at the tip of water tree and leads to the cable insulation failure finally.
Starting Page	1491
Ending Page	1496
File Size	1473499
Page Count	6
File Format	PDF
ISBN	9781479950324
DOI	10.1109/POWERCON.2014.6993780
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-10-20
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Trees - insulation Aging Power cables Needles Electric fields Power cable insulation transformation mechanism XLPE cables electrical tree water tree
Content Type	Text
Resource Type	Article

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The electrical trees initiation at different electric field strength in XLPE cable insulation

Some aspects of water tree growth in XLPE insulation exposed to DC voltage

Study on the transformation of electrical tree from water tree degradation in XLPE

Rehabilitation of water tree aged XLPE cable insulation

Effect of magnitude of space charges on the electric field distribution in XLPE insulation in presence of water trees

Development of New Water Tree Suppressive XLPE Cable

Insight on micro-structures of rejuvenated water-tree cables by two kinds of injection liquids

Toward understanding the relationship between insulation recovery and micro structure in water tree degraded XLPE cables

Diagnosis and restoration of water tree aged XLPE cable materials

Transformation mechanism of electrical tree to water tree in XLPE cables

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