Single-phase self-synchronized synchronverter with current-limiting capability

In this paper, a single-phase self-synchronized inverter with current limiting capability without a dedicated synchronization unit is presented. It offers an approach for power systems to control distributed renewable energy sources. The proposed system has the capability to synchronize itself with the utility grid before connection and track the grid frequency after connection without a phase-locked loop (PLL). Moreover, it provides the synchronverter with a current limiting capability during grid disturbances.