A Novel Hybrid Saturated Core Fault Current Limiter Topology Considering Permanent Magnet Stability and Performance

The saturated core fault current limiter (SFCL) is one of the most effective methods for limiting fault current. A permanent magnet (PM)-biased SFCL (PFCL) can reduce dc bias current and additional energy consumption. However, the thermal stability of NdFeB PMs in PFCL poses a major challenge. This...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2017-06, Vol.53 (6), p.1-4
Main Authors: Jiaxin Yuan, Yongheng Zhong, Yang Lei, Cuihua Tian, Weimin Guan, Yanhui Gao, Muramatsu, Kazuhiro, Baichao Chen
Format: Article
Language:English
Subjects:
Air gaps
Alternating current
Bias
Circuit faults
Coils
Coupling
Direct current
Eddy currents
Eddy-current loss
Electromagnetic coupling
Energy consumption
Fault currents
Finite element method
Inductors
Magnetic cores
Magnetic flux
Magnetism
Mathematical analysis
permanent magnets (PMs)
Power system stability
Reliability
Risk
saturated-core fault current limiter (SFCL)
Simulation
Stability analysis
Thermal stability
Topology
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Summary:The saturated core fault current limiter (SFCL) is one of the most effective methods for limiting fault current. A permanent magnet (PM)-biased SFCL (PFCL) can reduce dc bias current and additional energy consumption. However, the thermal stability of NdFeB PMs in PFCL poses a major challenge. This paper proposes a novel hybrid-type SFCL (HSFCL) topology that can reduce this risk. In the HSFCL, a hybrid PM/dc coil is designed to saturate the core, and a fault-limiting reactor is used to guarantee fault-clipping performance. The new structure provides air-gap branches for the time-varying magnetic field produced by alternating current, which reduces the eddy current in the PMs and enhances their stability. Electromagnetic coupling is used to analyze the operating principles and characteristics of HSFCL. Finite-element analysis simulations were performed using Maxwell and compared with verification experiments, proving that HSFCL is efficient in fault clipping and PM reliability enhancement.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2017.2669358