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Dynamic Characteristics of a 22.9 kV Hybrid SFCL for Short-Circuit Test Considering a Simple Coordination of Protection System in Distribution Networks

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8 Author(s)
Woo-Seok Kim ; KEPCO Res. Inst., Daejeon, South Korea ; Ok-Bae Hyun ; Chung-Ryul Park ; Seong-Woo Yim
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This paper presents the results of short-circuit tests with a 22.9 kV hybrid superconducting fault current limiter (SFCL) on the KEPCO test grid. The hybrid SFCL we used for the test had suffered from lots of field tests including a long term operation and it is still in working order. We have already proved that the SFCL showed high reliability as well as feasibility through a long term operation and short-circuit tests performed before. In this paper, we tried to study a dynamic characteristics of the same SFCL on the distribution power grid through short-circuit tests with a circuit breaker and a reclosing relay. An artificial fault generator (AFG) was used to generate fault currents in the KEPCO power test center. The two objectives of the tests are (1) verifying a precise reaction of the SFCL to reclosing operation and (2) a study for protection coordination with SFCL. The test results showed that the SFCL worked precisely with a fast recovery of the superconducting elements when we applied a one-time reclosing operation with the interval of 0.6 second. We also suggested a proper manipulation of the coordination of the protection system in distribution networks with the SFCL in the paper.

Published in:

Applied Superconductivity, IEEE Transactions on  (Volume:22 ,  Issue: 3 )

Date of Publication:

June 2012

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