Power Quality Analysis of a 110 MW Wind Farm in a 130 kV Switchyard
Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Good power quality is not only determined by uninterruptable power supply, voltage deviations also affect the function of the network and the equipment connected. Electromagnetic disturbances as flicker, harmonics, interharmonics and unbalance are decreasing the power quality. How are the measurement methods and restrictions stated, to keep the voltagedeviations within reasonable limits and thereby maintaining the networkfunction?
Lillgrund wind farm has power quality restrictions set by E.ON Elnät to fulfil in the connection point to the subtransmission network. In addition isa fault ride through requirement set by SVK. All equipment connected tothe network are introducing voltage changes, which can be measured at the point of connection. The scope of the thesis has been to explicitly determine Lillgrund‟s emissions. Three-phase voltage and current measurements have been performed, with measurement systems comprising different bandwidth, to analyse the power quality parameters.Comparisons between standard documentation and technical specifications have been made in order to precise what is considered as good power quality and how it can be measured accurately.
Place, publisher, year, edition, pages
2012. , 65 p.
UPTEC ES, ISSN 1650-8300 ; 12014
Power Quality, Flicker, Interharmonics, Harmonics, Unbalance, Wind Power
Elkvalitet, Flimmer, Obalans, Mellantoner, Övertoner, Vindkraft
Engineering and Technology
IdentifiersURN: urn:nbn:se:uu:diva-181193OAI: oai:DiVA.org:uu-181193DiVA: diva2:558206
Vattenfall Research and Development
Master Programme in Energy Systems Engineering
Pernestål, Kjell, Univ.lekt.Bergkvist, Mikael, Univ.lekt.