Clustering Electricity Consumers Challenges and Applications for Operating Smart Grids By Andrés M. Alonso, Eduardo Martín, Alicia Mateo, Francisco J. Nogales, Carlos Ruiz, and Andrea Veiga Digital Object Identifier 10.1109/MPE.2022.3150826 Date of current version: 19 April 2022 54 ieeepower & energy magazine 1540-7977/22©2022IEEE may/june 2022 ©SHUTTERSTOCK.COM/SOLARSEVENhttp://www.SHUTTERSTOCK.COM/SOLARSEVEN