Aggregated Emulation of Multiple Converters with Heterogeneous Dynamics in Low-Voltage Microgrids – A Clustering Approach

The high penetration of renewable generation and the increasing applications of power electronic converters are bringing about stability issues in modern microgrids. Considering multi-dynamic interactions among converters, the system-level modeling and validation of microgrids are of importance, where both the test strategies and hardware implementations are required. In this paper, a clustering method is proposed for stability validation in microgrids based on aggregated emulation of a bus with multi-dynamic converters. The method is demonstrated by real-time simulation results. A reconfigurable test setup is also introduced, which can functionally support the aggregated emulation and also high-fidelity validation of system-level stability in microgrids.