Storage management by rolling unit commitment for high renewable energy penetration

This paper presents a deterministic unified unit commitment and economic dispatch model that integrates storage devices in the short-term power system scheduling under high renewable energy penetration. The presented model is a single multi-hour look-ahead real time tool that uses multiple time resolution to reduce its computational requirements. Operating on a rolling basis, the decisions of the first scheduling period are binding while the decisions of the remaining scheduling horizon are indicative. Adopting this approach, storage facilities can be more efficiently operated, since the problem of defining the appropriate energy level of the storage devices during economic dispatch is alleviated. The operational impact of storage is validated via extensive simulations using data from the Greek Interconnected Power System.