Antti Harjula is a power system planning expert at the Finnish transmission system operator Fingrid Oyj. He works with long and mid-term planning of Finnish transmission network and is strongly involved with wind power connection studies, wind power plant modelling and grid connection requirements. During his seven years at Fingrid he has been also responsible for simulation grid model management, danger voltage analysis and other system studies. He has been working with ELVIS project since 2008, from the requirement definition phase, and is Fingrid team lead of ELVIS simulation grid model and calculations part. His special interest is to streamline the grid model management between different process areas among ELVIS system.