A new model of fault current limiter using YBCO thin film

A new low-loading HTS Superconductive-Normal (S-N) current switch using a YBCO thin film stripe is introduced in this paper. Low cost 2.45 Ghz microwave signal is applied as the triggering method. Two configuration patterns, cavity layout and transmission line layout, have been tested in the experimental environment. Reliable 100 ms S-N switching is observed with transmission line layout where the loading current is set below 5% of the critical current (Ic). This work demonstrates that a high frequency RF signal is an applicable approach for S-N switch development.

Section: B Current Pulse Triggered S-n Switchesmentioning

confidence: 99%

A New Low-Loading HTS Current Switch Triggered by RF Signals

Liu¹,

Mansour

Salama

2005

“…Due to this phenomenon, which is called quench of superconductors, some resistance is generated and fault current is greatly reduced. After the fault Manuscript current is reduced, superconductors recover from resistive state and can flow current in a superconducting state [1], [2]. The most typical materials of resistive fault current limiters are YBCO films or bulk Bi-2212.…”

Section: Introductionmentioning

confidence: 99%

Quench behavior of YBaCuO films for fault current limiters under magnetic field

Park

Kang

Lee

et al. 2003

The resistive superconducting fault current limiters (SFCLs) are very attractive devices for the electric power network. But they have some serious problems when the YBCO thin films were used for the current limiting materials due to the in homogeneities caused by manufacturing process. When the YBCO films have some inhomogeneities, simultaneous quenches are difficult to achieve when the fault current limiting units are connected in series for increasing operating voltage ratings.In order to solve these problems, vertical magnetic fields varied from 0 to 130 mT were applied to the YBCO elements. Then, extensive electric field-current ( -) and quench characteristics were investigated for all elements by using both electrical measuring method and observations of bubble behaviors. The experimental results were compared with the quench properties of YBCO elements, which were connected in series.From the experiment works, it was revealed that applied magnetic fields generated by surrounding coils could induce uniform quench distribution for all strips and simultaneous quenches were realized in all YBCO elements. Finally, by applying vertical magnetic fields perpendicular to the limiting devices, 1.2 kV rms rated resistive fault current limiter were realized using five YBCO films in series.Index Terms-Magnetic field, superconductive fault current limiter, YBCO film.

“…One of the first successes on the concept proof for using YBCO thin films in SFCL was achieved by Siemens-Germany during the 90s, where different deposition techniques and substrates were compared and tested for low, medium, and high voltage rated powers [15]. Iin the same period other no less important designs were also proposed by companies like Toshiba in Japan [16]. Then, in the next decade most of the research on SFCL based upon YBCO thin films was mainly dominated by Japan [17]- [20] and Korea [21] by pursuing some novel designs.…”

Section: Practical Implementation Of Sfcl: Field Test Status and mentioning

confidence: 99%

Resistive-Type Superconducting Fault Current Limiters: Concepts, Materials, and Numerical Modeling

Ruiz

Zhang

Coombs

2015

Abstract-In recent years, major industrialized countries have began to be concerned about the need for developing strategies on the integration and protection of the growing power capacity of renewable source energies, attracting back their interest on the development and understanding of superconducting fault current limiters (SFCL). The reasons for this are simple: a SFCL may offer a rapid, reliable and effective current limitation, with zero impedance during normal operation, and an automatic recovery after the fault. Nowadays, most of the R&D projects have turned towards to the study of the resistive type SFCL due to their potential to be small, and the likely decrease in price of 2G coated conductors. Thus, in this paper we provide an updated review on the state of the art of resistive type SFCL, emphasizing on the different approaches for the numerical modelling of their local physical properties, as well as on the already tested experimental concepts. Comparison between the properties and characteristics of different resistive-type SFCL using different superconducting materials is presented.