2025/03/21 by Jun Wu, Jia Chen, Jiawei Liu +4
Engineering · #Composite material #Computer science #Core (optical fiber) #Current (fluid) #Electrical Fault Detection and Protection #Fault current limiter #Limiter #Materials science #Phase (matter) #Physics #Telecommunications #Thermodynamics
paper · doi:10.1109/tmag.2025.3553564
openalex publication_date 2025/03/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/26
Traditional three-phase saturated core fault current limiter (TSCFCL) uses silicon steel as the iron core working material, resulting in the need for a large dc excitation magnetomotive force and the poor transient current-limiting effect. In this article, a three-phase energy drain-type saturated core fault current limiter (TEDFCL) is proposed to limit the transient short-circuit current in three-phase system under different conditions. The TEDFCL structure can effectively limit all kinds of short-circuit fault currents of the power grid and accelerate the attenuation of the short-circuit current dc component (CDCC). It has the advantages of small eddy current loss and improved reliability of permanent magnet (PM). First, the topology structure and working principle of the TEDFCL are introduced, and its equivalent electromagnetic model is established. Second, the transient current-limiting functions of the TEDFCL and PM eddy current loss are analyzed by finite element method (FEA). Next, the material optimization of the proposed TEDFCL using nanoamorphous material is analyzed. Finally, the experimental model of TEDFCL prototype is designed and built, and current-limiting experiment was carried out. The FEA simulation and experimental results demonstrate the feasibility and effectiveness of the current-limiting method and structure proposed in this article.