Construction of testing facilities and verifying tests of a 22.9 kV/630 A class superconducting fault current limiter

Yim, Seong-Woo; Yu, Seung-Duck; Kim, H.-R.; Kim, M.-J.; Park, C.-R.; Yang, Seong Eun; Kim, W.-S.; Hyun, Ok-Bae; Sim, Jae Kyeom; Park, K.-B.; Oh, I.S.

doi:10.1016/j.physc.2010.05.173

Cited by 11 publications

(3 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…And, if fault current flows, superconducting element is quenched, within 1/4 cycle fault current is limited. It minimizes the influence to the external equipment in electric power system and minimizes the damage, as well as after completing the fault current limitation role, within 0.5 sec it is reversed to superconducting status [3][4][5][6][7].…”

Section: 서 론mentioning

confidence: 99%

Electric Power Characteristics of a SFCL based on Turn-ratio of 3-Phase Transformer

Jeong¹,

Choi²,

Jung³

2014

The Transactions of The Korean Institute of Electrical Engineer

View full text Add to dashboard Cite

-At present, the demand for electric power increases, the electric power system is complicated. The size of the line-to-ground fault and the line-to-line fault occurred with complication of electric power system continue to increase, therefore several issues are raised. To address these issues effectively, the superconducting fault current limiter (SFCL) has been proposed, this study is ongoing. In this paper, we applied the SFCL in three-phase transformer and comparative analysis of the electric power burden to the SFCL. The superconductor is combined to the third winding of transformers in connection structure. In case of a third line-to-line fault, we did comparative analysis of the electric power burden to the SFCL based on the turn ratio of transformer third winding. In this case, we could confirm as the third turn ratio increased, electric power impressed to the superconducting element increased.

show abstract

Section: 서 론mentioning

confidence: 99%

Electric Power Characteristics of a SFCL based on Turn-ratio of 3-Phase Transformer

Jeong¹,

Choi²,

Jung³

2014

The Transactions of The Korean Institute of Electrical Engineer

View full text Add to dashboard Cite

show abstract

“…Recently, the fault current of the 345kV power systems, which play the central role in South Korea, also exceeded the breaking capacity of circuit breakers [2][3][4][5][6][7][8]. They were replaced with higher-grade breakers as with the 154kV systems, but because they cannot endure the fault current either, the bus separation system has been adopted [4][5][6][7][8]. The bus separation system, however, decreases the coherence between systems when operated for a long time.…”

Section: Introductionmentioning

confidence: 99%

“…The bus separation system, however, decreases the coherence between systems when operated for a long time. This damages stability and destroys the active and reactive power transmission flexibility, which leads to low supply reliability [5][6][7][8]. In addition, many methods for reducing the fault current have been presented, such as replacement of circuit breakers and installation of serial reactors and high-impedance transformers.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Transient Characteristics of a SFCL Applied Into Third-winding Transformer in a Single Line-to-ground Fault

Choi¹,

Choi²,

Jung³

2013

The Transactions of The Korean Institute of Electrical Engineer

View full text Add to dashboard Cite

-Coercion transformer is commonly used in the electrical grid which in three phase of distribution system. The accident of the electrical grid is divided into a single, a double, a third line-to-ground faults and a double, a third line-to-line faults. A single line-to-ground fault accounts for nearly 75[%] among them. In this research, when a Superconducting Fault Current Limiters (SFCL) was applied to the three phase power system, operation in a single line-to-ground fault and limiting characteristics of fault current according to turns ratio of third winding were analyzed. When a single line-to-ground fault happened, secondary winding's circuit was open. Then third winding's circuit with a SFCL was closed. So fault current was limited by diverted circuit. At this time, we could find out that size of the limited fault current could be changed according to third winding rate. We confirmed that limiting operation of the fault current was carried out within one-period. These results will be utilized in adjusting the size of the SFCL.

show abstract

Analysis on the Fusion Technology of a Commercial Transformer and an SFCL

Cho

Jung

Choi

2012

J Supercond Nov Magn

View full text Add to dashboard Cite

Construction of testing facilities and verifying tests of a 22.9 kV/630 A class superconducting fault current limiter

Cited by 11 publications

References 5 publications

Electric Power Characteristics of a SFCL based on Turn-ratio of 3-Phase Transformer

Electric Power Characteristics of a SFCL based on Turn-ratio of 3-Phase Transformer

Analysis of Transient Characteristics of a SFCL Applied Into Third-winding Transformer in a Single Line-to-ground Fault

Analysis on the Fusion Technology of a Commercial Transformer and an SFCL

Contact Info

Product

Resources

About