Cognition on the Current-Limiting Effect of Saturated-Core Superconducting Fault Current Limiter

The saturated-core superconducting fault current limiter (SCSFCL) is an important facility for limiting the short-circuit fault current of the power grid. However, the cognition or the judgment on the current-limiting effect, which is the key indicator of the SCSFCL, is not unique. This is because t...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on magnetics 2015-11, Vol.51 (11), p.1-4
Main Authors: Jia, Yuelong, Shi, Zhengjun, Zhu, Haojun, Hao, Li, Zou, Jun, Yuan, Jiansheng
Format: Article
Language:English
Subjects:
Cognition
Coils
Constraining
Current limiters
Current-limiting effect
Electric potential
Electric utilities
Fault current limiters
Fault currents
Faults
High-temperature superconductors
Limiting
Magnetism
Power grids
Reactance
Reduction
saturated core
superconducting fault current limiter
Superconducting transmission lines
Superconductivity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The saturated-core superconducting fault current limiter (SCSFCL) is an important facility for limiting the short-circuit fault current of the power grid. However, the cognition or the judgment on the current-limiting effect, which is the key indicator of the SCSFCL, is not unique. This is because the nonlinear property of the steel cores in the limiting state makes the voltage on the SCSFCL and the current passing through the SCSFCL not sinusoidal any more. In this paper, it is presented that the equivalent limiting reactance, which is commonly used currently, cannot reflect the current-limiting effect, nor is the induced voltage. It is pointed out that for a certain SCSFCL, the current-limiting effect is not fixed, and it depends on the parameters of the power grid as well as the position, where the SCSFCL is installed. It is clarified that only the current reduction rate by comparing the short-circuit fault current before and after the installation of the SCSFCL in a certain power grid can correctly reflect the current-limiting effect. Certainly, the calculation for the current-limiting effect must be conducted by the field-circuit coupled method, where the field concerns the property inside the SCSFCL and the circuit concerns the property of the power grid. This paper does not mainly focus on the simulation method, but provides the means of judging or evaluating current-limiting effect of the SCSFCL.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2015.2436715