Date & Time:
Tuesday, December 20, 2011; 12:00 PM
Ancillary services such as frequency regulation are required for reliable operation of the electric grid. Currently, the same traditional thermal generators that supply bulk power also perform nearly all frequency regulation. Instead, using high power energy storage resources to provide frequency regulation can allow traditional thermal generators to operate more smoothly. However, using energy storage alone for frequency regulation would require an unreasonably large energy storage capacity. Duration curves for energy capacity and instantaneous ramp rate are used to evaluate the requirements and benefits of using energy storage for a component of frequency regulation. High-pass filtering and closed-loop control are used to separate the portion of a frequency regulation control signal suitable for provision by an energy storage unit from the portion suitable for provision by traditional thermal generating resources. Not all frequency regulation signals are equally amenable to the filtering approach used here. Data from two U.S. control areas are used to demonstrate the techniques and the results are compared.
Olivia Leitermann is a Ph.D. candidate in Electrical Engineering at the Massachusetts Institute of Technology. Her research interests include power systems operations, grid-connected energy storage, and high-frequency power electronics. She previously received an S.M. degree in Electrical Engineering in 2008, and an S.B. degree in Ocean Engineering in 2005, both from MIT. She recieved the IEEE Power Electronics Society Transactions Prize Paper Award in 2008 and the IEEE Power Electronics Society Conference (PESC) Prize Paper Award in 2008.