Dr. Stan Atcitty received his BS and MS degree in electrical engineering from the New Mexico State University in 1993 and 1995, respectively. He received his Ph.D. from Virginia Tech University in 2006. He is presently a Distinguished Member of Technical Staff at Sandia National Laboratories in the Energy Storage Technology & Systems department. He has worked at Sandia for over 25 years. His interest in research is power electronics necessary for integrating energy storage and distributed generation with the electric utility grid. He leads the power electronics subprogram as part of the DOE Office of Electricity Energy Storage Program.

Keynote Speech: Role of power electronics and wide bandgap in grid-tied energy storage systems

Abstract: Grid-tied energy storage systems are a key subsystem to the electric utility infrastructure in that they provide multiple technical and economic benefits such increasing asset utilization and deferring upgrades of the grid, providing flexibility for the customer and cost control, maintaining power quality, and increasing the value of variable renewable generation from photovoltaic and wind generation systems. Such systems will ultimately improve the flexibility, reliability, security, quality, and cost effectiveness of the existing and future electric utility systems. Current energy storage systems including the power conversion system are packaged in standard shipping containers for the ease of transportability and siting. They are attractive because they have lower installation cost and less installation time to operation. This design approach provides unique technical challenges for the energy storage technology as well as the power conversion system. Due to the containerized approach, high power density and small footprint design is critical. There has been increase interest in the utilization of wide band gap (WBG) devices such as SiC and GaN for switch mode power supply applications. These materials offer the potential for higher switching frequencies, higher blocking voltages, lower switching losses and a higher junction temperature than traditional silicon-based switches. It has been shown that WBG-based power conversion systems along with advanced capacitors, magnetics and packaging can result in higher power density than silicon-based system and thus an attractive approach for containerized energy storage systems. This presentation will focus on the role of power electronics used in grid-tied energy storage systems.