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배전계통에 초전도 전류제한기 적용 시 Recloser-Fuse 협조 분석
김명후(Myoung-Hoo Kim),김진석(Jin-Seok Kim),유일경(il-Kyoung You),문종필(Jong-Fil Moon),임성훈(Sung-Hun Lim),김재철(Jae-Chul Kim),안재민(Jae-Min Ahn) 한국조명·전기설비학회 2009 한국조명·전기설비학회 학술대회논문집 Vol.2009 No.5월
This paper shows us the basic protective devices to protect against fault current such as recloser and fuse. Also recloser has been coordinated with fuse in distribution system to protect against fault current efficiently. However, in distribution system with SFCL, recloser-fuse coordination could be different to now and fault current couldn't be clear, if occurred. Therefore, this paper analysed recloser-fuse coordination in distribution system with SFCL using PSCAD/EMTDC.
모의 배전계통에 초전도 전류제한기 적용을 고려한 보호기기간의 보호협조 분석
김명후(Myoung-Hoo Kim),문종필(Jong-Fil Moon),김재철(Jae-Chul Kim),최종수(Jong-Soo Choi),임성훈(Sung-Hun Lim),유일경(Il-Kyoung You),김진석(Jin-Seok Kim) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.11
배전계통에서 전력 수요가 증가하고 분산 전원의 도입으로 대용량 변압기의 적용이 불가피하게 되었다. 이로 인한 계통의 단락전류가 증가되어 계통에 설치된 차단기의 용량초과로 이들의 교체에 따른 경제적 비용 상승이 예상되며, 보다 효과적인 대안으로 초전도 전류제한기에 대한 연구가 활발하게 진행되고 있다. 하지만, 위와 같은 장점을 갖는 초전도 전류제한기를 배전계통에 적용할 경우 기존의 보호기기간의 보호협조가 달라진다. 따라서, 초전도 전류제한기 적용을 고려한 보호기기간의 보호협조 분석이 필요하다. 본 논문에서는 모의 배전계통에 초전도 전류제한기 적용을 고려한 보호기기간의 보호협조 분석을 PSCAD/EMTDC를 이용하여 분석하였다. 그 결과 초전도 전류제한기 적용으로 인해 고장전류 크기가 감소하여 보호기기의 동작시간이 지연되는 것을 확인할 수 있었다.
배전계통에 초전도 전류제한기 적용 시 Relcoser-Fuse 협조 방법에 관한 연구
김명후(Myoung-Hoo Kim),김진석(Jin-Seok Kim),유일경(Il-Kyoung You),문종필(Jong-Fil Moon),임성훈(Sung-Hun Lim),김재철(Jae-Chul Kim) 대한전기학회 2009 전기학회논문지 Vol.58 No.10
We analyze the problem of recloser-fuse coordination when a superconducting fault current limiter (SFCL) is installed to a power distribution system. Generally, The recloser is installed to upstream of fuse to protect against both permanent fault and temporary one appropriately. However, in a power distribution system with SFCL, the fault current is decreased by the effect of the impedance value of the SFCL and when a permanent fault occurs, the fuse may not melt during the last delay operation of the recloser because of the insufficient heat from the decreased current. Therefore, when SFCLs are applied into a power distribution system, the rating of the fuse has to be reselected to coordinate recloser to fuse effectively. To solve these problems, this paper analysed the operation of recloser-fuse coordination and presented the improved recloser-fuse coordination method in a power distribution system with SFCL using PSCAD/EMTDC.
배전계통에 분산형 전원 증가에 따른 초전도 전류제한기 적용시 보호기기 협조동작 특성 분석
김명후(Myoung-Hoo Kim),김진석(Jin-Seok Kim),유일경(Il-Kyoung You),문종필(Jong-Fil Moon),임성훈(Sung-Hun Lim),김재철(Jae-Chul Kim) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.11
This paper analyzed that characteristic of coordinating operation of protective device in a power distribution system with Superconducting Fault Current Limiter (SFCL) and Distributed Generation (DG). In a power distribution system with DG, the fault current is increased because the DG is adding current source when a permanent fault occurs, and the protective devices in each other could not be coordinated. However, when SFCLs are applied into a power distribution system with DG, the coordination of protective devices could be accomplished. Therefore, to solve these problems, we analysed the operation of protective devices coordination in a power distribution system linked DG with SFCL.
배전계통에 초전도 전류제한기 적용 시 Recloser-Fuse 협조 방법
김명후(Myoung-Hoo Kim),김진석(Jin-Seok Kim),유일경(il-Kyoung You),문종필(Jong-Fil Moon),임성훈(Sung-Hun Lim),김재철(Jae-Chul Kim),안재민(Jae-Min Ahn) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
This paper shows us the analysis of the Recloser-Fuse coordination in power distribution system. Recloser has been installed with fuse to coordinate in power distribution system to protect against fault current efficiently. However, in power distribution system with SFCL, fault current couldn't be clear if occurred it as the operation of the Recloser-Fuse coordination couldn't be done. Therefore, this paper analysed the operation of the Recloser-Fuse coordination and found the method of the Recloser-Fuse coordination in power distribution system with SFCL using PSCAD/EMTDC.
소형 열병합발전 시스템이 연계된 배전계통에 초전도 전류제한기 적용시 리클로져-퓨즈 협조 분석
김명후(Myoung-Hoo Kim),김진석(Jin-Seok Kim),문종필(Jong-Fil Moon),임성훈(Sung-Hun Lim),김재철(Jae-Chul Kim),이준규(Joon-Kyu Lee) 대한전기학회 2010 전기학회논문지 Vol.59 No.3
This paper analyzed that the coordination of recloser-fuse when a superconducting fault current limiter (SFCL) is installed to a power distribution system linked small scale cogeneration system. As a rule, the recloser to properly protect against both permanent and temporary fault is installed to upstream of fuse. Therefore, in a power distribution system linked small scale cogeneration system, the fault current is increased by adding fault current of small scale Cogeneration system when a permanent fault occurs, and the fuse could melt during the first fast operation of the recloser because of more sufficient heat from the increased current. However, when SFCLs are applied into a power distribution system linked small scale cogeneration system, the coordination of recloser-fuse could be accomplished due to decreased fault current as the effect of the impedance value of the SFCL. Therefore, to solve these problems, we analysed the operation of recloser-fuse coordination in a power distribution system linked small scale cogeneration system with SFCL using PSCAD/EMTDC.
온민귀(Min-Gwi On),김명후(Myoung-Hoo Kim),김진석(Jin-Seok Kim),유일경(Il-Kyoung You),임성훈(Sung-Hun Lim),김재철(Jae-Chul Kim) 대한전기학회 2011 전기학회논문지 Vol.60 No.1
This paper analyzed the application of Superconducting Fault Current Limiter (SFCL) on 22.9 [㎸] bus tie in a power distribution system. Commonly, the parallel operations of power main transformers offer a lot of merits. However, when a fault occurs in the parallel operation of power main transformer, the fault currents might exceed the interruption capacity of existing protective devices. To resolve this problem, thus, the SFCL has been studied as the fascinating device. In case that, Particularly, the SFCL could be installed to parallel operation of various power main transformers in power distribution system of the Korea Electric Power Corporation (KEPCO) on 22.9 [㎸] bus tie, the effect of the resistance of SFCL could reduce the increased fault currents and meet the interruption capacity of existing protective devices by them. Therefore, we analyzed the effect of application and proposed the proper impedance of the R-type SFCL on 22.9 [㎸] bus tie in a power distribution system using PSCAD/EMTDC.
트리거형 초전도한류기의 접점구성에 따른 전류제한 및 회복특성 분석
최종수(Jong-Soo Choi),김명후(Myoung-Hoo Kim),유일경(Il-Kyoung You),김진석(Jin-Seok Kim),임성훈(Sung-Hun Lim),김재철(Jae-Chul Kim) 한국조명·전기설비학회 2010 조명·전기설비학회논문지 Vol.24 No.9
We experiment to analyze on current limiting and recovery characteristics of trigger type SFCL as the composition of the contact. Generally, some superconductor of SFCL is relatively largely loaded due to limit the fault current by oneself and recovery time is affected until the fault cleared. However, in the fault, the proposal trigger type SFCL transfer the fault current to current limiting reactor(CLR) using power switch so it could reduce the recovery time and load of the superconductor. However, because of applying the additional power switches, that could generate some power loss. Therefore, to solve this problem, we proposed the composition method of the double contact for a trigger type SFCL and analyzed on current limiting and recovery characteristics for ones.
배전변전소에 대용량변압기로 교체 적용시 보호협조를 위한 초전도 전류제한기의 임피던스 분석
김진석((Jin-Seok Kim),김명후(Myoung-Hoo Kim),류일경(Il-Kyoung You),문종필(Jong-Fil Moon),임성훈(Sung-Hun Lim),김재철(Jae-Chul Kim),안재민(Jae-Min Ahn) 대한전기학회 2009 전기학회논문지 Vol.58 No.8
The introduction of the large transformer due to the large power demand has increased the fault current in power distribution system. The increased fault current can exceed the cut-off ratings of the circuit breaker. As the methods to solve this problem, the superconducting fault current limiter(SFCL) has been notified. However, the limited fault current by SFCL affects the operational characteristics of the protective device such as overcurrent relay. Therefore, the selection of the proper impedance for the SFCL is required to keep overcurrent relay's protective coordination with the SFCL when a large transformer is introduced into the distribution system. In this paper, the SFCL's impedance for protective coordination was investigates in that a large transformer is introduced.