Abstract
In this study, the characteristics of the double quench and instantaneous power of a superconducting fault current limiter (SFCL) using two magnetically coupled windings were analyzed. In the proposed model of SFCL, two magnetically coupled windings are wound on the iron core and each winding is connected to one superconducting element. When a fault occurs, the SFCL can limit the fault current by the double quench occurrence of two superconducting elements. In order to analyze the influence of the winding direction on the fault current limiting characteristics of the proposed SFCL, two magnetically coupled windings were designed to allow the same and the reverse directions. From the simulated short circuit experiment, the currents and the voltages of two coupled windings and two superconducting elements were measured and the instantaneous power and the double quench occurrence were analyzed. It was confirmed from the experimental results analysis that the fault current limiting characteristics of the SFCL were more favorable in the reverse winding direction than in the same winding direction.
Highlights
The continuous increase in power demand and the various distributed power facilities have made the power supply flexible in the power system
From the analysis thethe experimental results, theoffault currentincluding limiting characteristics of analysis on the double quenchon and instantaneous power the superconducting fault current limiter (SFCL), the joule energy the could be confirmed to be more advantageous in the reverse winding direction compared to according to the winding direction of its magnetically coupled winding, were performed
The currents the transformers voltages of the SFCL, elements, twooff coupled windings were measured with the and current (CTs) and two the superconducting elements, potential transformers (PTs).and two coupled windings were measured with the current transformers (CTs) and the potential transformers (PTs)
Summary
The continuous increase in power demand and the various distributed power facilities have made the power supply flexible in the power system. This study’s researchers have published the results of the fault current limiter and the recovery characteristics of a series-connected resistance type SFCL using a magnetically coupled shunt-reactor [21,22]. From the analysis thethe experimental results, theoffault currentincluding limiting characteristics of analysis on the double quenchon and instantaneous power the SFCL, the joule energy the could be confirmed to be more advantageous in the reverse winding direction compared to according to the winding direction of its magnetically coupled winding, were performed. From the the sameon winding direction from the point of view of the increase in power capacity the suggested analysis the experimental results, the fault current limiting characteristics of theofSFCL could be SFCL. Energies 2020, 13, 5533 direction from the point of view of the increase in power capacity of the suggested SFCL
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