Understanding Real-world Energy Storage Performance and Reliability with Operational Data

Session: Rapid-Fire Introductions by Poster PresentersDate: Wednesday, October 16, 2019 / 11:35AM - 12:05PM PDTTags: Poster / Performance, Reliability and Technological Advancements

Battery storage systems are being integrated into the electric grid in increasing numbers to allow for enhanced grid stability and increased adoption of renewable resources.  With the increased presence and dependence on these storage assets, it is necessary to understand how reliably they have operated in the past and are projected to operate in the future.  Accurate performance measurement and reporting is central to characterizing long-term capabilities and improving operational efficiency, safety, and reliability.  These systems often report vendor-calculated performance metrics like State of Health (SOH) and State of Charge (SOC).  These are typically proprietary calculations used to indicate system performance and provide insight into warranty adherence.  As storage performance and reliability verification becomes more important to a wide spectrum of stakeholders, it has become necessary to develop methods to validate or correct this calculation independently. This presentation will describe current efforts in a collaboration between Electric Power Research Institute and Pacific Northwest National Laboratory to independently evaluate and assess performance and reliability metrics for operational energy storage systems. The presentation will also display the framework used to define the needed data; how the field data is collected, stored, and queried; as well as a description of the analytical tools under development.