Duke Energy, Samsung SDI and Younicos are partnering to update Duke Energy’s 36-megawatt (MW) energy storage and power management system at the company’s Notrees Windpower Project in west Texas. The system, one of the US’ largest, has been operating since 2012 with lead acid batteries. Over the course of 2016, these batteries will be gradually replaced with lithium-ion technology.
Duke Energy, the nation’s largest electric utility, currently owns nearly 15% of the grid-connected, battery-based energy storage capacity in the US, according to independent research firm IHS Energy.
Duke Energy works closely with ERCOT (Energy Reliability Council of Texas), which signals to the battery storage system to either dispatch stored energy to increase frequency or absorb energy to decrease frequency, helping to smooth and balance peaks and valleys on the ERCOT grid. By rapidly storing or releasing energy, the system can respond quickly to regulate frequency and provide additional services for grid management.
Samsung SDI, as primary engineering, procurement and construction manager, will provide its high-performing lithium-ion batteries and associated Battery Management System (BMS).
Younicos will provide its energy storage management system (ESMS), which will work in concert with the Samsung SDI software and batteries. The Younicos ESMS interprets the signal from ERCOT, enabling the Notrees battery project to store or dispatch energy as needed, while maintaining the energy storage system in an optimal performance state.
Younicos is also providing system design, engineering, software integration and testing, along with post-implementation engineering services.
In 2009, Duke Energy announced plans to match a $22-million grant from the US Department of Energy (DOE) to install large-scale batteries capable of storing electricity from the grid or produced by the company’s 153-MW Notrees Windpower Project. The system, one of the nation’s largest, is located in Ector and Winkler Counties, Texas, and has been operating since 2012.