Journal of Engineering Research

With the large-scale integration of new energy stations, flexible DC systems are widely used in the current power network. As a high-voltage direct current transmission technology based on voltage source converter (VSC), it can independently control active power and reactive power, and has high flexibility in application in the power grid, with good adaptability to various power demands. However, during the operation of new energy stations connected to flexible DC systems, AC line failures are difficult to avoid. To ensure the safe and stable operation of the system, it is necessary to accurately identify faults and adopt scientifically effective protection technologies. This paper focuses on the research of fault identification and protection technologies for AC lines connected to flexible DC systems in new energy stations.

New energy station; Flexible DC system; AC line; Fault identification; Protection technology