scholarly journals Modeling the Heating in a High Temperature Superconducting Current Carrying Element in Fault Current Limiters

2020 ◽  
Vol 9 (2) ◽  
pp. 1792-1798
Keyword(s):  
High Temperature ◽  
Comsol Multiphysics ◽  
Fault Current ◽  
Cross Sectional ◽  
High Temperature Superconducting ◽  
Different Types ◽  
Fault Current Limiters ◽  
Heating Up ◽  
The Impact ◽  
Superconducting Current

Mathematical model was developed for modeling the increase temperature in high temperature superconducting (HTS) current carrying element in superconducting fault current limiters (SFCL). The variation in the heating up of HTS element along its length is a result primarily of the variation in its resistance that has to do with the manufacturing process employed to make it.The model was developed and mathematical modeling of the process was carried out in the Comsol MultiPhysics software package. Element that was tested was a 12 mm wide stack of three stainless steel tapes and three HTS soldered to each other. In order to get more precise parameters for the models the cross-sectional thermal conductivity was measured for the stacks of HTS of two different types. The estimates obtained using the model were very close to experimental data. The impact was also studied of the spread of the electrical resistance of HTS on how fast the current carrying element made from it heated up.

scholarly journals Investigations on Quench Recovery Characteristics of High-Temperature Superconducting Coated Conductors for Superconducting Fault Current Limiters

Electronics ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 259
Author(s):  
Wei Chen ◽  
Peng Song ◽  
Hao Jiang ◽  
Jiahui Zhu ◽  
Shengnan Zou ◽  
...  
Keyword(s):  
High Temperature ◽  
Smart Grids ◽  
Recovery Time ◽  
Coated Conductors ◽  
Transfer Model ◽  
Fault Current ◽  
High Temperature Superconducting ◽  
Fault Current Limiters ◽  
Recovery Characteristic ◽  
The Impact

Superconducting fault current limiters (SFCLs) are attracting increasing attention due to their potential for use in modern smart grids or micro grids. Thanks to the unique non-linear properties of high-temperature-superconducting (HTS) tapes, an SFCL is invisible to the grid with faster response compared to traditional fault current limiters. The quench recovery characteristic of an HTS tape is fundamental for the design of an SFCL. In this work, the quench recovery time of an HTS tape was measured for fault currents of different magnitudes and durations. A global heat transfer model was developed to describe the quench recovery characteristic and compared with experiments to validate its effectiveness. Based on the model, the influence of tape properties on the quench recovery time was discussed, and a safe margin for the impact energy was proposed.

scholarly journals Modelling and Fault Current Characterization of Superconducting Cable with High Temperature Superconducting Windings and Copper Stabilizer Layer

Energies ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 6646
Author(s):  
Eleni Tsotsopoulou ◽  
Adam Dyśko ◽  
Qiteng Hong ◽  
Abdelrahman Elwakeel ◽  
Mariam Elshiekh ◽  
...  
Keyword(s):  
High Temperature ◽  
Power Systems ◽  
Power System ◽  
Fault Analysis ◽  
Fault Current ◽  
Transient Fault ◽  
Continuous Increase ◽  
High Temperature Superconducting ◽  
Current Limiting ◽  
The Impact

With the high penetration of Renewable Energy Sources (RES) in power systems, the short-circuit levels have changed, creating the requirement for altering or upgrading the existing switchgear and protection schemes. In addition, the continuous increase in power (accounting both for generation and demand) has imposed, in some cases, the need for the reinforcement of existing power system assets such as feeders, transformers, and other substation equipment. To overcome these challenges, the development of superconducting devices with fault current limiting capabilities in power system applications has been proposed as a promising solution. This paper presents a power system fault analysis exercise in networks integrating Superconducting Cables (SCs). This studies utilized a validated model of SCs with second generation High Temperature Superconducting tapes (2G HTS tapes) and a parallel-connected copper stabilizer layer. The performance of the SCs during fault conditions has been tested in networks integrating both synchronous and converter-connected generation. During fault conditions, the utilization of the stabilizer layer provides an alternative path for transient fault currents, and therefore reduces heat generation and assists with the protection of the cable. The effect of the quenching phenomenon and the fault current limitation is analyzed from the perspective of both steady state and transient fault analysis. This paper also provides meaningful insights into SCs, with respect to fault current limiting features, and presents the challenges associated with the impact of SCs on power systems protection.

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