Three-Phase Saturated-Core Fault Current Limiter

Haocong Shen, Fei Mei, Jianyong Zheng, Haoyuan Sha and Changjia She
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Haocong Shen: Department of Electrical Engineering, Southeast University, Nanjing 210096, China
Fei Mei: College of Energy and Electrical Engineering, Hohai University, Nanjing 211100, China
Jianyong Zheng: Department of Electrical Engineering, Southeast University, Nanjing 210096, China
Haoyuan Sha: Department of Electrical Engineering, Southeast University, Nanjing 210096, China
Changjia She: Department of Electrical Engineering, Southeast University, Nanjing 210096, China

Energies, 2018, vol. 11, issue 12, 1-18

Abstract: The saturated-core fault current limiter (SFCL) is widely used to limit the fault current. However, in the conventional SFCL structure, alternating current (AC) and direct current (DC) coils are wound on different loosely coupled cores. Owing to the leakage inductance, the traditional structure demonstrates relatively large demand for DC excitation power and excessive impedance during saturation. In this study, a new structure for winding closely coupled DC and AC coils on the same core in three phases is proposed to reduce the influence of leakage reactance on the SFCL performance. The leakage magnetic flux generated by both structures is analyzed by performing finite element analysis simulations and utilizing a magnetic field division method. The impedance of the limiter is measured at different DC currents and air gaps to optimize its dynamic performance. A fabricated prototype of the proposed limiter exhibits smaller steady-state losses and high current-limiting capability.

Keywords: saturated-core fault current limiter; leakage reactance; air gap; magneto motive force (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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