Dr. Sarah Rönnberg is an Assistant Professor with Luleå University of Technology, Skellefteå, Sweden, from where she has contributed to research in power quality and is a leading researcher on the emerging field of supraharmonics. She is secretary of CIGRE working groups C4.24 and C4/C6.29, and is an active member of several other CIGRE and IEEE working groups. She received a Ph.D. in Electric Power Engineering from Luleå University of Technology in 2013.