Abstract
Superconducting Fault Current Limiter (SFCL) modules with distinct arrangements have been investigated, seeking design and performance enhancements. In this context, this work aims to propose a design for resistive SFCL (R-SFCL) modules, using RE-Ba-Cu-O high-temperature superconducting tapes (HTS) wound on an alternative support material. An R-SFCL bench prototype was designed for 400 A and 500 V. Two pieces of 2G tapes, arranged in a bifilar antiparallel configuration were wound on Acrylonitrile Butadiene Styrene (ABS) tubes, which were made by means of a 3D printer. During the experiments, the SFCL was immersed in an open bath cryostat with liquid nitrogen and several measurements were carried out. The average limited current is about three times lower than the prospective one. To test the SFCL recovery time, the following procedure was adopted: The fault is induced during three cycles, and after, the current is reduced to zero. The SFCL is reconnected after some time considering that the fault was extinct, and the voltage level returned to normal operation. The results showed promising levels of limitation and recovery time for further developments.
Highlights
Increases in electricity demand and the growing importance of distributed generation in power systems have risen concerns about fault current levels [1]
This paper presents an alternative R-superconducting fault current limiters (SFCL) module with RE-Ba-Cu-O superconducting tapes, using a helical bifilar [22] construction to minimize the total inductance effect from the system assembled on Acrylonitrile Butadiene Styrene (ABS) tubes
The resistive-type SFCL (R-SFCL) critical current is defined by the component with the lower Ic (430 A)
Summary
Increases in electricity demand and the growing importance of distributed generation in power systems have risen concerns about fault current levels [1]. The SFCL keep approximately zero impedance under normal conditions of the power system, whereas it provides high impedance when leaving the superconducting state (quench), at the fault occurrence [1], [5]-[7]. Due to its simple topology, compactness, and stability, when compared with other designs, the resistive-type SFCL (R-SFCL) stand out as being the most studied configuration [8]-[10]. Several R-SFCL prototypes have been investigated and developed considering different types of configurations and materials [11]-[13]. Some studies use these prototypes to measure electrical and Brazilian Microwave and Optoelectronics Society-SBMO received 5 Oct 2020; for review 26 Oct 2020; accepted 14 Mar 2021
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