Protection and Earthing Requirements of Low Voltage AC and DC Distribution Networks Interfaced by Smart Transformers

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Paper number
2002
Working Group Number
Conference name
CIRED 2019
Conference date
3-6 June 2019
Conference location
Madrid, Spain
Peer-reviewed
Yes
Short title
Convener
Authors
Emhemed, Abdullah, Department of Electronic and Electrical Engineering- University of Strathclyde, United Kingdom
Smith, Kyle, Department of Electronic and Electrical Engineering University of Strathclyde, United Kingdom
Burt , Graeme M., University of Strathclyde, United Kingdom
Black, Paul, WSP, United Kingdom
Kazerooni, Ali, WSP, United Kingdom
Donoghue, Anthony, SP Energy Networks, United Kingdom
Eves, Michael, SP Energy networks, United Kingdom
Abstract
Electrification of more transport and heat will place increasing demand on LV networks for which they have not been designed for. This can potentially overload MV/LV transformers and LV cables, and may result in voltage drops outside statutory voltage limits. Deployment of solid state smart transformers (ST) at secondary substations has recently been considered as an alternative approach to address such issues. However, their deployment will lead to a radical change in the operation of associated LV networks and, in particular, protection systems. Therefore this paper investigates in detail the impact of a smart transformer deployment at a secondary substation on the performance of conventional MV/LV protection, and provide recommendation on suitable earthing and protection for LVDC and hybrid AC/DC distribution networks interfaced by a smart transformer. 
Table of content
Keywords
Publisher
AIM
Date
2019-06-03
Permanent link to this record
https://cired-repository.org/handle/20.500.12455/684
http://dx.doi.org/10.34890/905
ISSN
2032-9644
ISBN
978-2-9602415-0-1