The microgrids can provide sustainable supply to the important power users. However, the internal fault detection methods are not mature yet. A kind of microgrid topology is defined to decide the protection configuration. For a microgrid with inverter-based distributed generation (IBDG), the transient characteristics of typical faults are studied. And a fault detection method is put forward based on statistical analysis. All above may contribute to the research on the protection strategy for the microgrid.
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