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The flexible, efficient, and reliable operation of grid-interactive efficientbuildings (GEBs) is increasingly impacted by the growing penetration ofdistributed energy resources (DERs). Besides, the optimization and control ofDERs, buildings, and distribution networks are further complicated by theirinterconnections. In this paper, we exploit load-side flexibility and cleanenergy resources to develop a novel two-level hybrid decentralized-centralized(HDC) algorithm to control DER-connected GEBs. The proposed HDC 1) achievesscalability w.r.t. to a large number of grid-connected buildings and devices,2) incorporates a two-level design where aggregators control buildingscentrally and the system operator coordinates the distribution network in adecentralized fashion, and 3) improves the computing efficiency and enhancescommunicating compatibility with heterogeneous temporal scales. Simulations areconducted based on the prototype of a campus building at the Oak Ridge NationalLaboratory to show the efficiency and efficacy of the proposed approach.

Two-Level Decentralized-Centralized Control of Distributed Energy Resources in Grid-Interactive Efficient Buildings