Title :
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
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;
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
DOI :
10.1109/ICSD.1995.523073
