Low-Frequency Small-Signal Modeling of Interconnected AC Microgrids

As a solution for optimized, reliable and flexible operation of distribution systems, multiple AC microgrids can be interconnected. In this paper, low-order low-frequency small-signal model is proposed large-scale interconnected in order to analyze stability dynamics as well synthesize high-level controllers, e.g. inter-microgrid power flow controller. A sensitivity analysis-based technique introduced find significant modules fully inverter-based preserving the dominant modes. The including both droop-based PQ-controlled distributed generation units obtained by removing insignificant detailed reconfiguring modules. concept virtual swing equation aggregation modeling method are employed achieve single-order from each microgrid with any number sources. analysis synthesis easily done using model. frequency control three presented case study, which leads introducing oscillatory