Protection of Tie Lines Connected to Large-Scale Renewable Power Sources: Research Status, Challenges and Future Trends

This paper presents a detailed review of protection methods for tie lines connected to large-scale renewable energy sources (RESs). The control methods and fault characteristics of different types of RESs are first introduced as a theoretical basis. Secondly, the adaptability of conventional protection methods in the power grid connected with large-scale RESs is analyzed. Then the existing protection methods adapted to the tie line connected to RESs are summarized into two categories and reviewed. Finally, the technical development trend of RESs in power grids is introduced, and the challenges and possible future development trends of protection are proposed.