Variations of supraharmonic emissions in low voltage networks
Paper number
55Conference name
CIRED 2019Conference date
3-6 June 2019Conference location
Madrid, SpainPeer-reviewed
YesMetadata
Show full item recordAuthors
Rönnberg, Sarah , Luleå University of Technology, SwedenGil de Castro, Aurora, University of Cordoba, Spain
Espin Delgado, Angela, Luleå University of Technology, Sweden
Abstract
This paper describes and presents measurements of supraharmonic emission in low voltage grids in Europe, North America and Asia. One-minute average values for 2 kHz grouped components are given and a total supraharmonic distortion (TSHD) value is calculated for the frequency band 2 to 150 kHz. Statistical analyses are performed, investigating the site and time dependency of supraharmonic voltages. Results show that the average values are, with a 90% confidence within an interval of 0.09-0.56% of fundamental (FND) but higher values can occur. Based on analyses of these measurements some early conclusions can be drawn:Supraharmonic emission are present in low voltage gridsThe magnitudes and frequencies vary between sites and over timeThere is a daily pattern but also some randomness when supraharmonics appearPublisher
AIMDate
2019-06-03Published in
Permanent link to this record
https://cired-repository.org/handle/20.500.12455/116http://dx.doi.org/10.34890/234