The use of ultrasound for the detection of water trees in XLPE cable

Author

Auckland, D.W. ; McGrail, A.J. ; Smith, C.D. ; Varlow, B.R.

Author_Institution

Dept. of Electr. Eng., Manchester Univ., UK

fYear

1995

fDate

10-13 Jul 1995

Firstpage

681

Lastpage

684

Abstract

This paper describes a method whereby the frequency content of ultrasonic signals is used to locate water trees in cross linked polyethylene, thus enabling the tree density in cables to be determined non-destructively. A conventional A-scan technique is used to generate an ultrasonic signal representative of the polyethylene under inspection. The time signal is transferred to a computer and transformed to the frequency domain. This signal is then categorized by a Back Propagation Neural Network

Keywords

XLPE insulation; acoustic signal processing; backpropagation; frequency-domain analysis; insulation testing; neural nets; power cable insulation; power engineering computing; trees (electrical); ultrasonic materials testing; XLPE cable; back propagation neural network; conventional A-scan technique; cross linked polyethylene; frequency content; frequency domain analysis; nondestructive technique; time signal; tree density; ultrasonic signal; ultrasonic signals; ultrasound; water trees; Acoustic pulses; Acoustic refraction; Detectors; Frequency domain analysis; Inspection; Neural networks; Probes; Signal analysis; Trees - insulation; Ultrasonic imaging;

fLanguage

English

Publisher

ieee

Conference_Titel

Conduction and Breakdown in Solid Dielectrics, 1995. ICSD'95., Proceedings of the 1995 IEEE 5th International Conference on

Conference_Location

Leicester

Print_ISBN

0-7803-2040-9

Type

conf

DOI

10.1109/ICSD.1995.523073

Filename

523073