Evaluation of different local var control strategies in low voltage grids

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Paper number
0454
Working Group Number
Conference name
CIRED 2018 Ljubljana Workshop
Conference date
7 - 8 June 2018
Conference location
Ljubljana, Slovenia
Peer-reviewed
Yes
Short title
Convener
Authors
Schultis, Daniel-Leon, TU Wien, ESEA, Gußhausstraße 25/370-1, 1040, Wien, Austria
ILO, Albana, TU Wien, ESEA, Gußhausstraße 25/370-1, 1040, Wien, Austria
Schirmer, Christian, TU Wien, ESEA, Gußhausstraße 25/370-1, 1040, Wien, Austria
Abstract
This paper compares for the first time the impact of different var-control strategies on the behaviour of low voltage grids. Besides existing control strategies like Q(U)- and cosφ(P)-control of PV-inverters also the new ones, namely L(U)-control with or without Q-Autarkic customers, are investigated. The assessment of different control strategies is made by means of social and technical criteria. Investigations show that involving the prosumer-owned inverters in voltage control entails in principle social issues like discrimination and threat to data privacy. Local cosφ(P)- and Q(U)-control cause relatively high grid losses, extensive Q-exchanges between medium and low voltage grids and thus also considerable distribution transformer loadings. The application of L(U)-control mitigates the social issues and fulfils best the technical criteria. In this case the network operator is able to perform an effective voltage control by using his own devices. This control strategy enables the prosumers to internally compensate their reactive power needs; thus acting Q-Autarkic.
Table of content
Keywords
Publisher
AIM
Date
2018-06-07
Permanent link to this record
https://www.cired-repository.org/handle/20.500.12455/1134
http://dx.doi.org/10.34890/173
ISSN
2032-9628
ISBN
978-2-9602415-1-8