Energy Storage for Frequency Regulation

Trane selected Nuvation Energy to build a custom energy storage system (ESS) for a wastewater treatment plant in the City of Santa Rosa, CA. The plant employs backup diesel generators as part of their demand charge management system. It can take a few minutes for the diesel generators to get fully ramped up and online. Nuvation Energy created a custom energy storage system that could be used for demand charge management and facilitate the seamless transition from the utility grid to the diesel gensets.

Alevo selected Nuvation Energy's battery management system to manage the batteries in their 2 MW /1MWh energy storage system. A key reason they chose Nuvation Energy's BMS is because it can measure battery cells from 0 volts and accurately manage the charging process from 0% to 100%. Managing this charging process requires highly accurate current readings and a level of precision that most battery management systems cannot provide. Alevo's high energy density cells had 99% availability and could be safely discharged to zero volts. Today the Alevo Gridbank ESS pictured here continues to provide frequency regulation services to the PJM interconnect. Nuvation Energy's Multi-Stack Controller provides parallel stack management and enables servicing of individual battery stacks without taking down the ESS.