Third International Champéry Power Conference to be held in the beautiful ski resort of Champéry. This event is organized by the School of Engineering of Valais and the Automatic Control Laboratoy of the Swiss Institute of Technology in Zürich. Following two successful editions in 2017 and 2019, this workshop will gather a panel of speakers and an audience of international experts in the field of electric power systems to identify current and future challenges, as well as opportunities facing electric power systems in the context of the energy transition and discuss possible solutions.