Validation of Integrated Microgrid Building Blocks Using At-Scale PHIL and CHIL Environments

This paper presents real-time validation of Microgrid Building Blocks (MBBs) using integrated Power Hardware-in-the-Loop (PHIL) and Controller Hardware-in-the-Loop (CHIL) testing. The MBB framework enables scalable, standardized microgrid deployment through modular control, communication, and power conversion blocks. A laboratory platform combining physical hardware with a digital real-time simulator was used to validate four key functions: dynamic decoupling during upstream grid faults, optimal power flow under variable load and generation, coordination among multiple microgrids, and decentralized restoration of a neighboring microgrid following a blackout. The test system comprises two microgrids based on modified IEEE 13-bus feeders with photovoltaics, battery energy storage systems, and diesel generators. PHIL and CHIL interfaces link real-time simulated assets with hardware controllers and field equipment to assess performance under realistic conditions.