Location
Online
Event Website
https://hicss.hawaii.edu/
Start Date
3-1-2023 12:00 AM
End Date
7-1-2023 12:00 AM
Description
CAISO and PJM operate the majority of grid-connected batteries in the U.S. The two markets manage the energy constraints of batteries providing frequency regulation differently. PJM, which has a fast (RegD) and a slow (RegA) regulation signal, uses RegA to conditionally maintain energy neutrality of the RegD signal over short durations. CAISO offsets net energy produced/consumed for frequency regulation with energy from the real-time energy market. This paper presents a comparison of these strategies with the goal of assessing the advantages and disadvantages of each approach. Specifically, we compare the approaches in terms of regulation signal-following performance and additional system control effort. Case study results suggest that both strategies can reliably keep a battery away from its state of charge limits but that PJM's strategy requires larger energy deviation from base operations.
Recommended Citation
Moring, Hannah and Mathieu, Johanna, "A Comparison of Strategies for Managing Energy Constraints of Energy Storage Providing Frequency Regulation" (2023). Hawaii International Conference on System Sciences 2023 (HICSS-56). 7.
https://aisel.aisnet.org/hicss-56/es/markets/7
A Comparison of Strategies for Managing Energy Constraints of Energy Storage Providing Frequency Regulation
Online
CAISO and PJM operate the majority of grid-connected batteries in the U.S. The two markets manage the energy constraints of batteries providing frequency regulation differently. PJM, which has a fast (RegD) and a slow (RegA) regulation signal, uses RegA to conditionally maintain energy neutrality of the RegD signal over short durations. CAISO offsets net energy produced/consumed for frequency regulation with energy from the real-time energy market. This paper presents a comparison of these strategies with the goal of assessing the advantages and disadvantages of each approach. Specifically, we compare the approaches in terms of regulation signal-following performance and additional system control effort. Case study results suggest that both strategies can reliably keep a battery away from its state of charge limits but that PJM's strategy requires larger energy deviation from base operations.
https://aisel.aisnet.org/hicss-56/es/markets/7