Review and Prospects of Fault Ride-Through Technologies for Grid-Forming Converters

Grid-forming converters play a crucial role in power systems characterized by high levels of renewable energy integration. In contrast to grid-following converters, they regulate internal voltage for power injection, offering rapid reactive voltage support. Nonetheless, their reliability is a key issue as they can produce significant surge currents during faults, thereby posing safety hazards. This review paper examines fault ride-through solutions for grid-forming converters, emphasizing transient behaviors and strategies for current limitation. The objective is to present a comprehensive overview of progress, highlight existing challenges, and outline potential future developments in this domain.