Utilization of a mixture of CTs and current sensors in line differential protection applications

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Paper number
292
Working Group Number
Conference name
CIRED 2019
Conference date
3-6 June 2019
Conference location
Madrid, Spain
Peer-reviewed
Yes
Short title
Convener
Authors
Raipala, Ontrei, ABB Oy, Finland
Hovila, Petri, ABB Oy, Finland
Leminen, Janne, ABB Oy, Finland
Farughian, Amir, University of Vaasa, Finland
Memon, Aushiq, University of Vaasa, Finland
Kauhaniemi, Kimmo, University of Vaasa, Finland
Abstract
The popularity of Rogowski sensors is increasing due to their advantages over conventional CTs. Consequently, network utilities may sometimes end up facing a question whether it would be possible to use line differential protection on a line where the current measurements at the local end are based on CTs, whereas, the remote end measurements are based on current sensors. The main challenge in the use of such a combination in line differential protection applications is that while CTs may saturate, Rogowski sensors do not. Such issues were studied in a hardware-in-the-loop simulation setup. Based on the studies conducted, it appears that the use of mixture of CTs and current sensors for line differential protection applications is a feasible option provided that the CTs are properly dimensioned and that the protection settings are carefully chosen.
Table of content
Keywords
Publisher
AIM
Date
2019-06-03
Permanent link to this record
https://cired-repository.org/handle/20.500.12455/808
http://dx.doi.org/10.34890/1026
ISSN
2032-9644
ISBN
978-2-9602415-0-1