An Analysis and Short Circuit Test of Various Types of Bi-2223 Bifilar Winding Fault Current Limiting Module

This research work proposed an improved Resonant Fault Current Limiting (RFCL) protection scheme to reduce the impact of three-phase short-circuit faults in a power system sub-transmission network. The model used an interpolator-extrapolator technique based on a Resonant Fault Current Limiter (RFCL) for automating the procedure of predicting the required reactor value that must be in resonant circuit to limit the short-circuit current values to permissible values. Using the developed model, short-circuit fault simulations on the three phases of the transmission line (Phase A-C) were performed in the MATLAB-SIMULINK environment. Simulation results were obtained by varying the resonant inductance (reactor) parameter of the RFCL circuit for each of the phases to obtain permissible short-circuit current levels and the values used to program a functional interpolator-extrapolator in MATLAB; the resonant values were typically set to values of inductance equal to 0.001H, 0.01H and from 0.1H to 0.5H in steps of 0.1H. Simulation results revealed the presence of very high short-circuit current levels at low values of the resonant inductor. From the results of simulations, there are indications that the RFCL approach is indeed very vital in the reduction of the short circuit current values during the fault and can safeguard the circuit breaker mechanism in the examined power system sub-transmission system. In addition, lower fault clearing times can be obtained at higher values of inductances; however, the clearance times start to converge at inductance values of 0.1H and above.

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Research and application of fault current control methods for artificial DC short-circuit test

10.1109/icempe51623.2021.9509182 ◽

2021 ◽

Author(s):

Luo Pan-dian ◽

Xiao Lei-shi ◽

Sheng Chao ◽

Zhu Liang-he

Keyword(s):

Short Circuit ◽

Current Control ◽

Fault Current ◽

Control Methods ◽

Short Circuit Test

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Experiment of a Resistive Superconducting Fault Current Limiter Based on MgB2 under Different Supply Voltages

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.721.527 ◽

2013 ◽

Vol 721 ◽

pp. 527-530

Author(s):

Lei Yao ◽

Jun Mei ◽

Jian Yong Zheng ◽

Bin Liu ◽

You Xu

Keyword(s):

Short Circuit ◽

Short Circuit Current ◽

Test System ◽

Fault Current ◽

Fault Current Limiter ◽

Voltage Level ◽

Superconducting Fault Current Limiter ◽

Current Limiting ◽

Current Limiter ◽

Test Result

In order to limit the short-circuit current, and to prevent the power grid and its equipment from the shock of the short circuit, the fault current limiter with detection, trigger and limiting was introduced. A small resistive type superconducting fault current limiter prototype based on MgB2, cooled by liquid helium and heliumgas, was developed and tested by a test system. The test result showed that the prototype based on MgB2 produced superior limiting performance, the short-circuit current suppressing ratio was up to more than 45%, and with the rise of the voltage level, the current limiting capability was also gradually increased, up to 56%.

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DC Current Limiting Characteristics of Flux-Coupled Type SFCL Using Superconducting Element Connected in Parallel in a DC System

Energies ◽

10.3390/en14041096 ◽

2021 ◽

Vol 14 (4) ◽

pp. 1096

Author(s):

Young-Pil Kim ◽

Seok-Cheol Ko

Keyword(s):

Short Circuit ◽

Secondary Coil ◽

Fault Current ◽

Dc System ◽

Power Load ◽

Current Limiting ◽

Operating Current ◽

In Series ◽

Performance Conditions ◽

Dc Current

In this paper, the fault current limiting (FCL) characteristics of a flux-coupled type superconducting fault current limiter (SFCL) with parallel connection between two windings in a DC system were analyzed. The flux-coupled type SFCL was composed of two coils connected in parallel and a superconducting element (SE), which was connected in series with the secondary coil. The flux-coupled type SFCL works in DC systems similar to those in AC systems. Before a fault occurs, the respective magnetic fluxes generated by the two coils connected in parallel offset each other, maintaining the voltage induced in the two coils at zero. In case of a fault, however, resistance is generated in the SE, preventing the magnetic fluxes generated by the two coils from offsetting each other. Thus, some voltage is induced in the two coils, and this starts to limit the fault current. DC short circuit tests were conducted, and the test results confirmed that the flux-coupled type SFCL with the two parallel connected coils was effective in limiting the fault current in a DC system. Additionally, the effect of the wiring direction of the two coils on the SFCL’s FCL performance and operating current, limiting impedance, and instantaneous power load was further analyzed, and as a result, the performance conditions of the SFCL in a DC system were determined.

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