scholarly journals Fault Current Limiting Characteristics of a Small-Scale Bridge Type SFCL with Single HTSC Element Using Flux-Coupling

Electronics ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 569 ◽  
Author(s):  
Tae-Hee Han ◽  
Seok-Cheol Ko ◽  
Sung-Hun Lim
Keyword(s):  
Energy Consumption ◽  
Small Scale ◽  
Fault Current ◽  
Fault Current Limiter ◽  
Superconducting Fault Current Limiter ◽  
Flux Coupling ◽  
Power Load ◽  
Current Limiting ◽  
Bridge Type ◽  
Load Characteristics

In this paper, a bridge type superconducting fault current limiter (SFCL) with a single high-temperature superconducting (HTSC) element is proposed to allow fault current limiting operation in direct current (DC) conditions. First, the principle of operation of the bridge type SFCL with a single HTSC element using flux-coupling was presented. After the fault occurrence, the fault current limiting operation and voltage characteristics, the power load characteristics of each device, and the energy consumption of the two coils and the HTSC element were analyzed in the proposed SFCL. As a result, it is confirmed that in the case of the additive polarity winding, the power consumption and the energy consumption of the HTSC element were lower than those in the subtractive polarity winding, and the fault current limiting characteristics were excellent.

scholarly journals Magnetizing Characteristics of Bridge Type Superconducting Fault Current Limiter (SFCL) with Simultaneous Quench Using Flux-Coupling

Energies ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1760
Author(s):  
Seok-Cheol Ko ◽  
Tae-Hee Han ◽  
Sung-Hun Lim
Keyword(s):  
Input Voltage ◽  
Critical Currents ◽  
Fault Current ◽  
Fault Current Limiter ◽  
Superconducting Fault Current Limiter ◽  
Flux Coupling ◽  
Current Limiting ◽  
Before And After ◽  
Bridge Type ◽  
Current Limiter

A bridge type superconducting fault current limiter (SFCL) with simultaneous quench using two high-temperature superconducting (HTSC) elements and two coils was fabricated to analyze the fault current limiting characteristics. Before and after the fault occurrence, the current limiting operation and the voltage waveforms of each device were compared according to the change of the input voltage. We also analyzed flux linkages and instantaneous powers of the bridge type SFCL with simultaneous quench using flux-coupling composed of HTSC elements with different critical currents. During the fault period, the magnetization power area and the flux linkage’s operating range variation due to the magnetizing current were compared with each other.

scholarly journals Fault Ride Through Capability Improvement of DFIG Based Wind Farm Using Nonlinear Controller Based Bridge-Type Flux Coupling Non-Superconducting Fault Current Limiter

Energies ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1696 ◽  
Author(s):  
Md. Rashidul Islam ◽  
Md. Najmul Huda ◽  
Jakir Hasan ◽  
Mohammad Ashraf Hossain Sadi ◽  
Ahmed AbuHussein ◽  
...  
Keyword(s):  
Wind Farm ◽  
Power Grid ◽  
Fault Current ◽  
Fault Current Limiter ◽  
Nonlinear Controller ◽  
Superconducting Fault Current Limiter ◽  
Flux Coupling ◽  
Fault Ride Through ◽  
Bridge Type ◽  
Current Limiter

High penetration of Doubly Fed Induction Generator (DFIG) into existing power grid can attribute complex issues as they are very sensitive to the grid faults. In addition, Fault Ride Through (FRT) is one of the main requirements of the grid code for integrating Wind Farms (WFs) into the power grid. In this work, to enhance the FRT capability of the DFIG based WFs, a Bridge-Type Flux Coupling Non-Superconducting Fault Current Limiter (BFC-NSFCL) is proposed. The effectiveness of the proposed BFC-NSFCL is evaluated through performance comparison with that of the Bridge-Type Fault Current Limiter (BFCL) and Series Dynamic Braking Resistor (SDBR). Moreover, a dynamic nonlinear controller is also proposed for controlling the operation of the BFC-NSFCL. Extensive simulations are carried out in the MATLAB/SIMULINK environment for both symmetrical and unsymmetrical temporary as well as permanent faults. Based on the simulation results and different numerical analysis, it is found that the proposed nonlinear controller based BFC-NSFCL is very effective in enhancing the FRT capability of the WF. Also, the BFC-NSFCL outperforms the conventional BFCL and SDBR by maintaining a near-seamless performance during various grid fault situations.

Influence of a Flux-Coupling Type Superconducting Fault Current Limiter on Power System Transient Stability

2012 ◽  
Vol 588-589 ◽  
pp. 632-637
Author(s):  
Ge Fei Qiu ◽  
Jun Hao Cao ◽  
Zi Qing Xu ◽  
Meng Song ◽  
Lei Chen ◽  
...  
Keyword(s):  
Power System ◽  
Transient Stability ◽  
Fault Current ◽  
Fault Current Limiter ◽  
Stability Calculation ◽  
Superconducting Fault Current Limiter ◽  
Flux Coupling ◽  
Calculation Results ◽  
Current Limiter ◽  
Coupling Type

In this paper, the influence of superconducting fault current limiter (SFCL, flux-coupling type) on power system transient stability is studied in detail. The influence of SFCL to transient stability of power system is studied using a model of single generator infinite bus system, different transient stability calculation results gotten with and without SFCL and with model system in different fault conditions are compared. The results show that the SFCL can effectively reduce the transient swing amplitude of rotor and extend the critical clearance time, and the application of SFCL in the power system can help to enhance its transient stability.

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