Dynamic Modeling of a Hybrid Microgrid and Stability Analysis Considering Communication Delays

This paper presents a state-space model for analyzing hybrid microgrids (MG) with various dynamic components, including a detailed model of generator and two inverters. The model captures the details of the control loops of the generator and inverters. The energy storage-based inverter controls MG voltage and frequency, while the generator and slave inverter receive active and reactive power commands from the master inverter. The model also takes into account the effects of communication delays on the control of the hybrid MG. Each sub-model is linearized around an operating point and the resulting system matrix is used to derive the eigenvalues. The paper focuses on the study of the transient response of the hybrid MG using eigenvalues to indicate the frequency and damping of oscillatory components in both island and grid-connected modes.