Condition assessment of medium voltage underground cables based on tangent delta and partial discharge measurements

Thumbnail Image

Files

CIRED 2019 - 1866.pdf (761.88 KB)

Paper number

1866

Working Group Number

Conference name

CIRED 2019

Conference date

3-6 June 2019

Conference location

Madrid, Spain

Peer-reviewed

Yes

Short title

Convener

Authors

Pakonen, Pertti, Tampere University, Finland
Keränen, Juha, Helen Sähköverkko Oy, Finland
Heinonen, Tuomo, Dekra Industrial Oy, Finland
Verho, Pekka, Tampere University, Finland

Abstract

The suitability of 0.1 Hz VLF tangent delta (TD) and three different partial discharge (PD) measurement methods for condition assessment and commissioning measurements of MV underground cable systems were studied. On-site measurements were conducted in MV networks of 12 Finnish distribution network operators (DNOs) on a total of 100 three phase cable systems of different ages and 5 different cable types. Based on the TD measurement results the limits given in IEEE Std400.2-2013 seem too high for Finnish cable systems. No clear correlation between the PD and TD measurement results or the age of the cable and TD was observed. It could be concluded that the measurements complement each other revealing different degradation mechanisms. TD measurement does not reliably reveal the presence of PD and thus, for cable commissioning, PD measurement is recommended.

Table of content

Keywords

Publisher

AIM

Date

2019-06-03

Published in

CIRED 2019 Conference

Permanent link to this record

https://cired-repository.org/handle/20.500.12455/616
http://dx.doi.org/10.34890/841

ISSN

2032-9644

ISBN

978-2-9602415-0-1