Measuring PD propagation in complex MV distribution network configurations

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Paper number
757
Working Group Number
Conference name
CIRED 2019
Conference date
3-6 June 2019
Conference location
Madrid, Spain
Peer-reviewed
Yes
Short title
Convener
Authors
Barrios Pereira, Sonia Raquel, Ormazabal Corporate Technology, Spain
Gilbert, Ian, Ormazabal Corporate Technology A.I.E, Spain
Orue, Iñaki, Ormazabal Corporate Technology A.I.E, Spain
Mulroy, Patrick, Ormazabal Corporate Technology A.I.E, Spain
Hurtado, Aritz, Ormazabal Corporate Technology A.I.E, Spain
Abstract
The presence of Partial Discharge (PD) activity in an electrical network indicates potential future failures that could be prevented knowing the PD source location. Although several location techniques are used, the accurate location in complex configurations is a difficult task because the PD pulse is attenuated, dispersed and reflected according to the cable system configuration. The pulse shape is also distorted and measurements are influenced by high amplitude noise and other external interference. This paper investigates the behaviour of PD pulses propagation in a laboratory controlled medium voltage network that allows reconfiguration and repeatability under the same conditions. An online PD monitoring system is used to register the PD activity and a time-of-flight (TOF) method is applied to determine the time of arrival of pulses at different points of this network. The pulse propagation velocity is subsequently calculated. The main objective is to determine if the presence of different components, like transformers, switchgears, substations, busbars, etc. significantly affects propagation. An average propagation velocity throughout the cable system will be calculated. It will be determined if this value is useful in determining PD source location and its relative error.
Table of content
Keywords
Publisher
AIM
Date
2019-06-03
Permanent link to this record
https://cired-repository.org/handle/20.500.12455/140
http://dx.doi.org/10.34890/280
ISSN
2032-9644
ISBN
978-2-9602415-0-1