In what represents a major step toward modernizing the foundation of our nation’s grid, GE Research and Prolec GE have teamed with Cooperative Energy to develop and install the world’s 1st flexible large power transformer at the utility’s major substation in Columbia, Mississippi. This substation is part of a service network that delivers power to nearly a half million homes and businesses across Mississippi. The transformer, rated at 165kV, 60/80/100 MVA and developed as part of an ongoing project funded through the US Department of Energy’s Office of Electricity, has begun six months of field validation to assess its performance and understand how this new technology could transform grid management in the future.Transformers are part of the backbone of electricity grids, regulating the flow of power from generation plants, where electricity is produced, through transmission and distribution power lines to be delivered to people’s homes and businesses. Historically, the existing infrastructure has performed reliably well. But as higher percentages of renewables like wind and solar power come online, new transformers, with much greater flexibility in impedance, will be required to support the grid in voltage regulation, stability, fault management, and transmission lines restoration and resiliency. This new large flexible transformer technology is poised to help meet this need.