Sensors and Materials
ISSN 0914-4935

Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
Sensors and Materials
is covered by Science Citation Index Expanded (Clarivate Analytics), Scopus (Elsevier), and other databases.

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Sensors and Materials,
Volume 29, Number 8 (2017)

Copyright(C) MYU K.K. All Rights Reserved.
pp. 1181-1190
S&M1410
https://doi.org/10.18494/SAM.2017.1539
Published: August 16, 2017

Space Charge Measurement for a 27-mm Thick Cross-Linked Polyethylene Sample using the PEA Method [PDF]

Masumi Fukuma and Takashi Maeno

(Received December 5, 2016; Accepted April 24, 2017)

Keywords: space charge, thick sample, XLPE, polymer insulating material, PEA method

Cross-linked polyethylene (XLPE) is used in electric power cables as insulation. The maximum thickness of an XLPE layer is 27 mm in a 500 kV class electric power cable. The pulsed electroacoustic (PEA) method is widely used to measure the space charge distribution in dielectric materials. When measuring the space charge distribution in dielectric materials using the normal PEA method, the acoustic wave (PEA signal) from which the space charge profile is obtained is detected by a piezoelectric device in the system. Usually, the sample thickness is less than 10 mm in a normal PEA system. When a thicker sample is used, the space charge measurement is very difficult to obtain with a normal PEA system, because the amplitude of the acoustic wave from the upper electrode decreases with thickness compared with that of the acoustic wave from the lower electrode. Using a redesigned PEA system, space charge distributions have been measured in the 27-mm-thick XLPE sample in a 1 kV/mm DC electric field. The experimental results show that the redesigned PEA system can detect a PEA signal from the lower and upper electrodes in the 27-mm-thick XLPE sample. The deconvolution technique applied to the dispersion in the thick XLPE sample has also been improved.

Corresponding author: Masumi Fukuma


Cite this article
Masumi Fukuma and Takashi Maeno, Space Charge Measurement for a 27-mm Thick Cross-Linked Polyethylene Sample using the PEA Method, Sens. Mater., Vol. 29, No. 8, 2017, p. 1181-1190.


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