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삼차권선을 이용한 이중퀜치 자속구속형 초전도한류기의 전류제한 특성 분석
한태희,임성훈,Han, Tae-Hee,Lim, Sung-Hun 한국전기전자재료학회 2016 전기전자재료학회논문지 Vol.29 No.5
The flux-lock type superconducting fault current limiter (SFCL) connects the two parallel windings in parallel with a ferromagnetic core. We suggest that the double quench flux-lock type SFCL should add a third winding. We analyzed characteristics of the fault current and the peak current using the quench of the high-Tc superconducting element. The proposed SFCL's inductances of a primary winding and the third winding were fixed and the amplitude of inductance of the secondary winding was changed. We found that the fault current can be more effectively controlled through the analysis of the equivalent circuit and the short-circuit tests.
피크전류제한 기능을 갖는 초전도한류기의 전류제한 특성분석
한태희,임성훈,Han, Tae-Hee,Lim, Sung-Hun 한국전기전자재료학회 2011 전기전자재료학회논문지 Vol.24 No.1
The superconducting fault current limiter (SFCL) with a peak current limiting function according to the initial fault current with the different amplitudes was suggested. The proposed SFCL, which consists of two limiting components, causes only the first superconducting element among two limiting components to be quenched in case that the initial fault current with the lower peak amplitude happens. On the other hand, the initial fault current with the higher peak amplitude makes both the superconducting elements of two limiting components to be quenched, which contributes to the peak current limiting function of the SFCL. To confirm the fault current limiting operation of the proposed SFCL, the short-circuit tests of the SFCL according to the fault angle were carried out and its effective fault current limiting operations could be discussed.
자속구속형 초전도전류제한기의 권선비 변화에 따른 전류제한 및 전압강하 보상 특성
한태희,임성훈,Han, Tae-Hee,Lim, Sung-Hun 한국전기전자재료학회 2011 전기전자재료학회논문지 Vol.24 No.5
In this paper, we investigated the fault current limiting and the load voltage sag suppressing characteristics of the flux-lock type SFCL, designed with the additive polarity winding, according to the variations of turn number's ratio and the comparative analysis between the resistive type and the flux-lock type SFCLs were performed as well. From the analysis for the short-circuit tests, the flux-lock type SFCL designed with the larger turn number's ratio was shown to perform more effective fault current limiting and load voltage sag suppressing operations compared to the flux-lock type SFCL designed with the lower turn number's ratio through the fast quench occurrence of the high-$T_C$ superconducting (HTSC) element comprising the flux-lock type SFCL. In addition, the recovery time of the flux-lock type SFCL after the fault removed could be confirmed to be shorter in case of the flux-lock type SFCL designed with the lower turn number ratio.
모의전력계통에 적용된 자속구속형 초전도 전류제한기의 전류제한 특성 분석
한태희,임성훈,Han, Tae-Hee,Lim, Sung-Hun 한국전기전자재료학회 2011 전기전자재료학회논문지 Vol.24 No.2
When the current of the superconducting element exceeds its critical current by the fault occurrence, the quench of the high-$T_C$ superconducting fault current limiter (HTSC) comprising the flux-lock type superconducting fault current limiter (SFCL) occurs. Simultaneously, the magnetic flux in the iron core induces the voltage in each coil, which contributes to limit the fault current. In this paper, the fault current limiting characteristics of the flux-lock type SFCL as well as the load voltage sag suppressing characteristics according to the flux-lock type SFCL's winding direction were investigated. To confirm the fault current limiting and the voltage sag suppressing characteristics of the this SFCL, the short-circuit tests for the simulated power system with the flux-lock type SFCL were carried out. The flux-lock type SFCL designed with the additive polarity winding was shown to perform more effective fault current limiting and load voltage sag suppressing operations through the fast quench occurrence right after the fault occurs and the fast recovery operation after the fault removes than the flux-lock type SFCL designed with the subtractive polarity winding.
변압기 권선을 이용한 자속구속형 초전도 전류제한기의 전류제한 특성 분석
한태희,임성훈,Han, Tae-Hee,Lim, Sung-Hun 한국전기전자재료학회 2011 전기전자재료학회논문지 Vol.24 No.2
The fault current limiting characteristics of the flux-lock type superconducting fault current limiter (SFCL) using a transformer winding were investigated. The suggested flux-lock type SFCL consists of two parallel connected coils on an iron core and the transformer winding connected in series with one of two coils. In this SFCL, the high-TC superconducting (HTSC) element was connected with the secondary side of the transformer. The short-circuit experimental devices to analyze the fault current limiting characteristics of the flux-lock type SFCL using the transformer winding were constructed. Through the short-circuit tests, the flux-lock type SFCL using transformer winding was shown to perform more effective fault current limiting operation compared to the previous flux-lock type SFCL without the transformer winding from the viewpoint of the quench occurrence and the recovery time of the HTSC element.
두 트리거 전류를 갖는 자속구속형 초전도한류기의 고장전류 크기에 따른 초전도 모듈의 전력부담 분석
한태희,임성훈,Han, Tae-Hee,Lim, Sung-Hun 한국전기전자재료학회 2016 전기전자재료학회논문지 Vol.29 No.7
In this paper, the power burden of High-TC superconducting (HTSC) module comprising the flux-lock type superconducting fault current limiter (SFCL) with two triggering currents during the fault period was analyzed. The short-circuit tests for the simulated power system with the SFCL in the different fault positions, which were expected to affect the amplitude of the fault current, were carried out. Through the comparative analysis on the power burden of the HTSC modules, the proposed flux-lock type SFCL was confirmed to be effective to divide into two power burdens according to the amplitude of the fault currents.
두 번의 피크전류제한 기능을 갖는 변압기형 초전도한류기의 과도전류제한 동작 특성 연구
한태희,임성훈,Han, Tae-Hee,Lim, Sung-Hun 한국전기전자재료학회 2016 전기전자재료학회논문지 Vol.29 No.8
In this paper, we analyzed the operational characteristics of the fault current limiting according to the amplitude of the fault current for the transformer type superconducting fault current limiter (SFCL). If the fault current happens, the superconducting element connected to the secondary coil is occurred quench and the fault current is limited. When the larger fault current occurs, the superconducting element connected to the third coil is occurred additional quench and the peak fault current is limited. We found that the fault current can be more effectively controlled through the analysis of the fault current limiting and the short-circuit tests.
한태희,Han, Tae-Hui 한국통신학회 2007 정보와 통신 Vol.24 No.3
이동통신 SoC 설계는 통신, 반도체, 컴퓨터 등 IT 기술의 학제간 융합이 가장 활발히 실현되는 선도적 위치를 차지하고 있다. 본고에서는 시대적 흐름과 기술적 주요 이슈를 중심으로 이동 통신 SoC설계 기술, 모뎀 주요 블록, 시스템 통합 기술의 현재와 미래에 대해 산업체에서의 개발 경험을 바탕으로 폭넓게 고찰하고 향후 방향과 해결책을 모색하고자한다.