Synchrophasor-Based State Estimation for Microgrid Protection

The challenge of microgrid protection is associated with many factors, such as frequently changing conditions and topology, lack of established power flow direction, presence of inverter-interfaced generation, among others. To overcome the challenges faced by the conventional protection, the paper demonstrates the application of a synchrophasor-based state estimation algorithm for protection of microgrids. The approach is tested on a model of an existing microgrid/test feeder. The results show the inherent flexibility of the approach towards changing conditions of microgrid operation. It requires minimum coordination that ensures quick detection of various types of faults in different locations.