Solid-State Transformers (IMAGE) North Carolina State University Caption Solid-state transformers, developed at NC State, can make the smart grid concept a reality. Credit NC State University Usage Restrictions Photo credit must be given. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.