Coordinated operation of a grid scale energy storage system with tap changer for voltage control on primary substations

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Paper number
1994
Working Group Number
Conference name
CIRED 2019
Conference date
3-6 June 2019
Conference location
Madrid, Spain
Peer-reviewed
Yes
Short title
Convener
Authors
Nieto, Alejandro, UK Power Networks Services, United Kingdom
Efstratiadi, Maria-Aliki, UK Power Networks Services, United Kingdom
Coughlan, Kieran, UK Power Networks Services, United Kingdom
Currie, Alastair, UK Power Networks Services, United Kingdom
Do, Sam, UK Power Networks, United Kingdom
Abstract
On-Load Tap Changers (OLTC) are used by Distribution Network Operators (DNOs) to regulate the output voltage of transformers and thus manage the voltage at grid and primary substations. An Energy Storage System (ESS) is equipped with power electronics interfaces which are capable of supporting the voltage control in different network points while delivering ancillary services in parallel to the electricity grid.The aim of this paper is to propose an alternative scheme of voltage control which uses reactive power from an ESS, optimising the utilisation and thus extending the life of OLTCs used on distribution networks. The proposed ESS Co-ordinated Voltage Control Service (CVCS) has been developed and assessed in a real 6MW/10MWh ESS connected on the secondary (11kV) side of an HV/MV substation in the UK.The trial results showed that a grid scale ESS is suitable and effective in providing voltage support across a full load cycle (24 hours), while allowing a lifetime extension and maintenance deferral of OLTC’s in primary substations.
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Keywords
Publisher
AIM
Date
2019-06-03
Permanent link to this record
https://cired-repository.org/handle/20.500.12455/680
http://dx.doi.org/10.34890/902
ISSN
2032-9644
ISBN
978-2-9602415-0-1