TY - RPRT TI - A Secondary Control Framework for Microgrid Interoperability With Vendor-Agnostic Grid-Forming Units: Design, Implementation, and Demonstration via Large-Scale Hardware Setup AU - Chakraborty, Soham [National Laboratory of the Rockies (NLR), Golden, CO (United States). Power Systems Engineering Center] (ORCID:0000000312294176) AU - Wang, Jing [National Laboratory of the Rockies (NLR), Golden, CO (United States). Power Systems Engineering Center] (ORCID:0000000261566302) AU - Ganguly, Subhankar [National Laboratory of the Rockies (NLR), Golden, CO (United States). Power Systems Engineering Center] (ORCID:0000000333070614) AU - Kroposki, Benjamin [National Laboratory of the Rockies (NLR), Golden, CO (United States). Power Systems Engineering Center] (ORCID:0000000262155206) PY - 2025 DO - 10.1109/access.2025.3643737 UR - https://www.osti.gov/biblio/3218394 ID - 3218394 ER -