Duke Energy's Notrees Battery Storage Project in Texas scooped the utility-scale energy storage innovation award at the 2013 Energy Storage North America (ESNA) Conference and Expo in San Jose, California.
The project's 36 MW advanced lead-acid battery helps smooth the naturally variable output from Duke Energy's 153 MW Notrees Wind Power Project. By storing energy generated by the wind farm, the project can respond quickly to regulate frequency and provide ancillary services for grid management.
The project has been operating since late 2012. Duke Energy matched a $22m Department of Energy grant to develop the project, and Texas-based Xtreme Power designed and installed the battery.
Award winners were judged on services provided to the grid, financing options, ownership model and technology strengths.