PROJECT TITLE :

Joint Optimal Design and Operation of Hybrid Energy Storage Systems

ABSTRACT:

The big selection of performance characteristics of storage technologies motivates the employment of a hybrid energy storage system (HESS) that combines the most effective features of multiple technologies. However, HESS design is advanced, in that it involves the selection of storage technologies, the sizing of each storage component, and deciding when to charge and discharge each underlying storage component (operating strategy). We tend to formulate the problem of jointly optimizing the sizing and also the operating strategy of an HESS that can be used for a large category of applications and storage technologies. Rather than a single set of storage element sizes, our approach determines the Pareto-optimal frontier of the sizes of the storage elements along with the corresponding optimal operating strategy. Therefore, as long as the performance objective of a storage application (such as an off-grid microgrid) can be expressed as a linear combination of the underlying storage sizes, the optimal vector of storage sizes falls somewhere on this frontier. We tend to present 2 case studies to illustrate our approach, demonstrating that a single storage technology is generally inadequate to satisfy application necessities, unlike an HESS designed using our approach. We tend to additionally find easy, close to-optimal, and sensible operating strategies for these case studies, which permits us to achieve several new engineering insights.