Electronic Science and Technology ›› 2022, Vol. 35 ›› Issue (8): 21-26.doi: 10.16180/j.cnki.issn1007-7820.2022.08.004

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Optimization Design of Air Gap Structure of Series Compensating Saturated Core Fault Current Limiter

WANG Ruixin,YAO Lei   

  1. School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China
  • Received:2021-02-22 Online:2022-08-15 Published:2022-08-10
  • Supported by:
    National Natural Science Foundation of China(51707121)


Saturated core fault current limiter will cause higher harmonic pollution when used in series compensation. In order to ensure the safe and stable operation of the power system, the saturated core fault current limiter with improved air gap structure is designed based on the principle of segment saturated core. The simulation models of saturated core fault current limiter with different air gap structures are established by JMAG. The relationship between current and flux of the current limiter is imported into MATLAB/Simulink and the corresponding simulation system model is established to further analyze and compare the control characteristics, harmonic content and fault current limiting ability of the two current limiter models. The results show that the saturated core fault current limiter with improved air gap structure has about 1.5 times of reactance regulation range and lower harmonic distortion rate when compared with the full air gap structure without losing the current limiting capacity.

Key words: fault current limiter, finite element analysis, series compensation, air gap structure, saturated core, harmonic analysis, reactor, power quality

CLC Number: 

  • TN702