Multi-spatio-temporal scale coordinated dispatch for modern distribution systems with long-duration energy storage

Employing vast and heterogeneous distributed energy resources (DERs) is crucial for modern distribution systems (MDS). However, existing day-ahead and real-time top-down dispatch methods hardly accommodates long-duration energy storage needs with cross-day dispatch cycles, and fail to use the regulation capabilities of DERs owned by different entities. To this end, a novel multi-spatio-temporal scale coordinated MDS dispatch method is proposed, where the zonal management and the multi-temporal rolling correction with week horizon are utilized to manage DERs locally. First, in spatial dimension, a decentralized management framework based on zonal balancing and coordinated autonomy is proposed, where a self-adaptive zone division method and a hierarchical interactive framework are formed. Second, in temporal dimension, a rolling correction with week horizon mechanism is established, which uses weekly rolling electricity optimization and day-ahead-to-real-time decentralized power scheduling to utilize DERs with differentiated flexibility features. Third, an improved alternating direction multipliers method (ADMM) based solution algorithm is utilized to implement the proposed MDS dispatch method in a practical way. Case study validates the efficiency of the proposed method in improving the local penetration of renewable energy and ensuring operational economy.