Long-term power quality measurements in medium voltage networks
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Paper number
652
Working Group Number
Conference name
CIRED 2019
Conference date
3-6 June 2019
Conference location
Madrid, Spain
Peer-reviewed
Yes
Short title
Convener
Authors
Rönnberg, Sarah , Luleå University of Technology, Sweden
Gutiérrez Ballesteros, Elena, University of Cordoba, Spain
Gil de Castro, Aurora, University of Cordoba, Spain
Westman, Mailn, Skellefteå Kraft Elnät, Sweden
Brodin, Magnus, Skellefteå Kraft Elnät, Sweden
Gutiérrez Ballesteros, Elena, University of Cordoba, Spain
Gil de Castro, Aurora, University of Cordoba, Spain
Westman, Mailn, Skellefteå Kraft Elnät, Sweden
Brodin, Magnus, Skellefteå Kraft Elnät, Sweden
Abstract
A
power quality survey has been performed in several Swedish medium voltage (MV)
substations and a study of the long-term power quality levels under normal
operation has been done. The measurements have been performed during several
years and the study includes seasonal variations as well as weekly and daily
variations. This paper will focus on harmonic voltage distortion (THD and
individual harmonics). An analysis has been done looking into metrological data
to see any possible correlation with variations in harmonic distortion. Conclusions
show that there are some significant differences over the years and between
days for all sites. Long term measurements are needed to gain information on
which levels one can expect, measuring for only a few weeks or month can give
an over or underestimation of the actual levels. Results also shows that the magnitudes
of harmonic distortion are well below the permitted level at all time at the
selected sites.
Table of content
Keywords
Publisher
AIM
Date
2019-06-03
Published in
Permanent link to this record
https://cired-repository.org/handle/20.500.12455/96
http://dx.doi.org/10.34890/197
http://dx.doi.org/10.34890/197
ISSN
2032-9644
ISBN
978-2-9602415-0-1