Monitoring harmonic distortion in microgrids using dynamic mode decomposition

This paper discusses the application of a spatiotemporal analysis method based on the dynamic mode decomposition (DMD) framework to analyze harmonic distortion in a microgrid test system with several distributed generation units. The proposed technique extracts spatiotemporal coherent patterns from which the frequency components, modal energy, mode-shape and participation factors can be determined simultaneously. Due to its multiscale nature, the method is well suited for the analysis and monitoring of harmonic distortion in complex microgrid systems. The explicit representation of switching processes in the power electronic converters and non-linear loads is fully considered to assess the robustness of the proposed framework.