비대칭 고장전류 저감 기능을 갖는 초전도 한류기 동작 방안

Title
비대칭 고장전류 저감 기능을 갖는 초전도 한류기 동작 방안
Other Titles
Operational Method of Superconducting Fault Current Limiter with Reduction Function of Asymmetric Fault Current
Author(s)
이상봉김창환서훈철[서훈철]김규호[김규호]김철환[김철환]
Keywords
Superconducting Fault Current Limiter(SFCL); Asymmetric Fault Current; Fault Angle; Electro-Magnetic Transients Program(EMTP)/Alternative Transient Program(ATP) Draw
Issue Date
201410
Publisher
한국조명.전기설비학회
Citation
조명.전기설비학회논문지, v.28, no.10, pp.56 - 62
Abstract
When fault currents contain decaying DC offset, the peak value of the fault current in the first cycle of the fault period is higher than the fault current during the steady-state period. To reduce the asymmetric fault current, this paper proposes an operation scheme using the series connection of two hybrid type Superconducting Fault Current Limiters (SFCLs) : an auxiliary SFCL and a main SFCL. The proposed method calculates the fault angle by comparing the zero-crossing time with fault detection time. According to the fault angle calculated, an auxiliary SFCL operates to reduce an asymmetric fault current during half a cycle after fault occurrence. After this process, the fault current is limited by a main SFCL. To confirm the usefulness of the proposed method, case studies using Electro-Magnetic Transients Program (EMTP)/Alternative Transient Program (ATP) Draw are perfomed.
URI
http://hdl.handle.net/YU.REPOSITORY/30575
ISSN
1229-4691
Appears in Collections:
공과대학 > 전기공학과 > Articles
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