Low-Cost Communication-Assisted Line Protection for Multi-Inverter Based Microgrids

Multi-inverter microgrid systems, particularly those with loop topology, offer higher power supply reliability and robustness compared to conventional radial distribution systems. In meshed communication-less protection schemes have proved be ineffective for multi-inverter microgrids due bidirectional flow, limited controlled fault currents generated by the voltage source converters interfacing energy network. This makes communication-assisted line preferable such systems despite necessity communication means. While these are effective, their depends much on availability. requires a back-up path in case main one fails bringing up cost issue that hinders uptake. paper proposes novel low-cost based directional blocking strategy can operate as well any scheme using means between terminals. As main, it low-bandwidth system. back-up, would share same use of healthy lines when faulted line's fails. Thus saving